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黑马java面试宝典.pdf(568页)

Java语言基础

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第一章 内容介绍.................................................................................................................................................................................20
第二章 JavaSE 基础 ...........................................................................................................................................................................21
一、 Java 面向对象....................................................................................................................................................................21
1. 面向对象都有哪些特性以及你对这些特性的理解...................................................................................................21
2. 访问权限修饰符 public、private、protected, 以及不写(默认)时的区别(2017-11-12).......................22
3. 如何理解 clone 对象....................................................................................................................................................22
二、 JavaSE 语法(2017-11-12-wl) .................................................................................................................................27
1. Java 有没有 goto 语句?(2017-11-12-wl) .......................................................................................................27
2. & 和 && 的区别(2017-11-12-wl) ...................................................................................................................27
3. 在 Java 中,如何跳出当前的多重嵌套循环(2017-11-14-wl) .......................................................................27
4. 两个对象值相同 (x.equals(y) == true) ,但却可有不同的 hashCode,这句话对不对?(2017-11-14-
wl).......................................................................................................................................................................................28
5. 是否可以继承 String (2017-11-14-wl).............................................................................................................28
6. 当一个对象被当作参数传递到一个方法后,此方法可改变这个对象的属性,并可返回变化后的结果,那么
这里到底是值传递还是引用传递?(2017-11-14-wl)..............................................................................................29
7. 重载(overload)和重写(override)的区别?重载的方法能否根据返回类型进行区分?(2017-11-15-
wl).......................................................................................................................................................................................29
8. 为什么函数不能根据返回类型来区分重载?(2017-11-15-wl).....................................................................30
9. char 型变量中能不能存储一个中文汉字,为什么?(2017-11-16-wl).......................................................31
10. 抽象类(abstract class)和接口(interface)有什么异同?(2017-11-16-wl) ..............................................31
11. 抽象的(abstract)方法是否可同时是静态的(static), 是否可同时是本地方法(native),是否可同时被


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synchronized(2017-11-16-wl)................................................................................................................................32
12. 阐述静态变量和实例变量的区别?(2017-11-16-wl) ...................................................................................32
13. ==和 equals 的区别?(2017-11-22-wzz)......................................................................................................33
14. break 和 continue 的区别?(2017-11-23-wzz) ...........................................................................................33
15. String s = "Hello";s = s   " world!";这两行代码执行后,原始的 String 对象中的内容到底变了没有?
(2017-12-1-lyq)...........................................................................................................................................................33
三、 Java 中的多态....................................................................................................................................................................35
1. Java 中实现多态的机制是什么?................................................................................................................................35
四、 Java 的异常处理 ...............................................................................................................................................................35
1. Java 中异常分为哪些种类............................................................................................................................................35
2. 调用下面的方法,得到的返回值是什么?...............................................................................................................35
3. error 和 exception 的区别?(2017-2-23).........................................................................................................36
4. java 异常处理机制(2017-2-23)............................................................................................................................37
5. 请写出你最常见的 5 个 RuntimeException(2017-11-22-wzz)..................................................................37
6. throw 和 throws 的区别(2017-11-22-wzz) .....................................................................................................38
7. final、finally、finalize 的区别?(2017-11-23-wzz)......................................................................................38
五、 JavaSE 常用 API ...............................................................................................................................................................39
1. Math.round(11.5)等于多少?Math.round(- 11.5) 又等于多少?(2017-11-14-wl).....................................39
2. switch 是否能作用在 byte 上,是否能作用在 long 上,是否能作用在 String 上?(2017-11-14-wl)........39
3. 数组有没有 length() 方法?String 有没有 length() 方法?(2017-11-14-wl) .............................................39
4. String 、StringBuilder 、StringBuffer 的区别?(2017-11-14-wl) ...............................................................39


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5. 什么情况下用“ ”运算符进行字符串连接比调用 StringBuffer/StringBuilder 对象的 append 方法连接
字符串性能更好?(2017-11-14-wl)..............................................................................................................................40
6. 请说出下面程序的输出(2017-11-14-wl) ................................................................................................................47
7. Java 中的日期和时间(2017-11-19-wl)....................................................................................................................48
六、 Java 的数据类型 ...............................................................................................................................................................70
1. Java 的基本数据类型都有哪些各占几个字节...........................................................................................................70
2. String 是基本数据类型吗?(2017-11-12-wl)...................................................................................................71
3. short s1 = 1; s1 = s1   1; 有错吗?short s1 = 1; s1  = 1 有错吗;(2017-11-12-wl)...........................71
4. int 和 和 Integer 有什么区别?(2017-11-12-wl)...............................................................................................71
5. 下面 Integer 类型的数值比较输出的结果为?(2017-11-12-wl).......................................................................72
6. String 类常用方法(2017-11-15-lyq)..................................................................................................................74
7. String、StringBuffer、StringBuilder 的区别?(2017-11-23-wzz)...........................................................74
8. 数据类型之间的转换(2017-11-23-wzz)............................................................................................................75
七、 Java 的 IO ..........................................................................................................................................................................75
1. Java 中有几种类型的流(2017-11-23-wzz)........................................................................................................75
2. 字节流如何转为字符流 ................................................................................................................................................76
3. 如何将一个 java 对象序列化到文件里......................................................................................................................76
4. 字节流和字符流的区别(2017-11-23-wzz)........................................................................................................77
5. 如何实现对象克隆?(2017-11-12-wl) ....................................................................................................................77
6. 什么是 java 序列化,如何实现 java 序列化?(2017-12-7-lyq) ........................................................................80
八、 Java 的集合........................................................................................................................................................................81


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1. HashMap 排序题,上机题。(本人主要靠这道题入职的第一家公司)................................................................81
2. 集合的安全性问题.........................................................................................................................................................83
3. ArrayList 内部用什么实现的?(2015-11-24)....................................................................................................83
4. 并发集合和普通集合如何区别?(2015-11-24) ................................................................................................89
5. List 的三个子类的特点(2017-2-23).....................................................................................................................91
6. List 和 Map、Set 的区别(2017-11-22-wzz)....................................................................................................91
7. HashMap 和 HashTable 有什么区别?(2017-2-23) .......................................................................................92
8. 数组和链表分别比较适合用于什么场景,为什么?(2017-2-23) .................................................................93
9. Java 中 ArrayList 和 Linkedlist 区别?(2017-2-23) .......................................................................................96
10. List a=new ArrayList()和 ArrayList a =new ArrayList()的区别?(2017-2-24)....................................97
11. 要对集合更新操作时,ArrayList 和 LinkedList 哪个更适合?(2017-2-24).................................................97
12. 请用两个队列模拟堆栈结构(2017-2-24)......................................................................................................101
13. Collection 和 Map 的集成体系(2017-11-14-lyq).....................................................................................102
14. Map 中的 key 和 value 可以为 null 么?(2017-11-21-gxb)...................................................................103
九、 Java 的多线程和并发库................................................................................................................................................104
(一)多线程基础知识--传统线程机制的回顾(2017-12-11-wl)....................................................................104
(二)多线程基础知识--线程并发库(2017-12-11-wl).....................................................................................118
(三)多线程面试题.......................................................................................................................................................246
十、 Java 内部类.....................................................................................................................................................................272
1. 静态嵌套类 (Static Nested Class) 和内部类(Inner Class)的不同?(2017-11-16-wl)......................272
2. 下面的代码哪些地方会产生编译错误?(2017-11-16-wl)...........................................................................272


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第三章 JavaSE 高级 ........................................................................................................................................................................273
一、 Java 中的反射.................................................................................................................................................................273
1. 说说你对 Java 中反射的理解...................................................................................................................................273
二、 Java 中的动态代理........................................................................................................................................................273
1. 写一个 ArrayList 的动态代理类(笔试题) .........................................................................................................273
2. 动静态代理的区别,什么场景使用?(2015-11-25).....................................................................................274
三、 Java 中的设计模式&回收机制....................................................................................................................................274
1. 你所知道的设计模式有哪些.....................................................................................................................................274
2. 单例设计模式..............................................................................................................................................................275
3. 工厂设计模式..............................................................................................................................................................276
4. 建造者模式(Builder)............................................................................................................................................279
5. 适配器设计模式..........................................................................................................................................................280
6. 装饰模式(Decorator)..........................................................................................................................................282
7. 策略模式(strategy)..............................................................................................................................................283
8. 观察者模式(Observer)........................................................................................................................................285
9. JVM 垃圾回收机制和常见算法 ................................................................................................................................287
10. 谈谈 JVM 的内存结构和内存分配........................................................................................................................291
11. Java 中引用类型都有哪些?(重要)..................................................................................................................293
12. heap 和 stack 有什么区别(2017-2-23) ........................................................................................................295
13. 解释内存中的栈 (stack) 、堆 (heap) 和方法区 (method area) 的用法(2017-11-12-wl)..........302
四、 Java 的类加载器(2015-12-2) ...............................................................................................................................302


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1. Java 的类加载器的种类都有哪些? ........................................................................................................................302
2. 类什么时候被初始化? .............................................................................................................................................303
3. Java 类加载体系之 ClassLoader 双亲委托机制 (2017-2-24)....................................................................303
4. 描述一下 JVM 加载 class (2017-11-15-wl) .................................................................................................307
5. 获得一个类对象有哪些方式?(2017-11-23-wzz) ........................................................................................308
五、 JVM 基础知识(2017-11-16-wl)...........................................................................................................................309
1. 既然有 GC 机制,为什么还会有内存泄露的情况 (2017-11-16-wl)........................................................309
六、 GC 基础知识(2017-11-16-wl).............................................................................................................................310
1. Java 中为什么会有 GC 机制呢?(2017-11-16-wl) .......................................................................................310
2. 对于 Java 的 GC 哪些内存需要回收(2017-11-16-wl).................................................................................310
3. Java 的 GC 什么时候回收垃圾(2017-11-16-wl) ...........................................................................................311
七、 Java8 的新特性以及使用(2017-12-02-wl)........................................................................................................312
1. 通过 10 个示例来初步认识 Java8 中的 lambda 表达式(2017-12-02-wl)..............................................312
2. Java8 中的 lambda 表达式要点(2017-12-02-wl) ........................................................................................320
3. Java8 中的 Optional 类的解析(2017-12-02-wl)..........................................................................................322
八、 在开发中遇到过内存溢出么?原因有哪些?解决方法有哪些?(2017-11-23-gxb) .................................329
第四章 JavaWEB 基础...................................................................................................................................................................330
一、JDBC 技术.........................................................................................................................................................................330
1. 说下原生 jdbc 操作数据库流程?(2017-11-25-wzz)..................................................................................330
2. 什么要使用 PreparedStatement?(2017-11-25-wzz)..............................................................................331
3. 关系数据库中连接池的机制是什么?(2017-12-6-lyq)................................................................................332


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三、Http 协议..........................................................................................................................................................................333
1. http 的长连接和短连接(2017-11-14-lyq)......................................................................................................333
2. HTTP/1.1 与 HTTP/1.0 的区别(2017-11-21-wzy).......................................................................................333
3. http 常见的状态码有哪些?(2017-11-23-wzz)............................................................................................336
4. GET 和 POST 的区别?(2017-11-23-wzz).....................................................................................................337
5. http 中重定向和请求转发的区别?(2017-11-23-wzz)................................................................................338
四、Cookie 和 Session..........................................................................................................................................................338
1. Cookie 和 Session 的区别(2017-11-15-lyq)................................................................................................338
2. session 共享怎么做的(分布式如何实现 session 共享)?.............................................................................339
3. 在单点登录中,如果 cookie 被禁用了怎么办?(2017-11-23-gxb) ........................................................342
五、jsp 技术..............................................................................................................................................................................342
1. 什么是 jsp,什么是 Servlet?jsp 和 Servlet 有什么区别?(2017-11-23-wzz)....................................342
2. jsp 有哪些域对象和内置对象及他们的作用?(2017-11-25-wzz)..............................................................343
六、XML 技术 ..........................................................................................................................................................................344
1. 什么是 xml,使用 xml 的优缺点,xml 的解析器有哪几种,分别有什么区别?(2017-11-25-wzz) 344
第五章 JavaWEB 高级....................................................................................................................................................................346
一、 Filter 和 Listener...........................................................................................................................................................346
二、AJAX ..................................................................................................................................................................................346
1. 谈谈你对 ajax 的认识?(2017-11-23-wzz)...................................................................................................346
2. jsonp 原理(2017-11-21-gxb)...........................................................................................................................347
三、Linux ..................................................................................................................................................................................348


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1. 说一下常用的 Linux 命令.........................................................................................................................................348
2. Linux 中如何查看日志?(2017-11-21-gxb) ..................................................................................................349
3. Linux 怎么关闭进程(2017-11-21-gxb)...........................................................................................................350
四、 常见的前端框架有哪些.................................................................................................................................................351
1. EasyUI(2017-11-23-lyq)....................................................................................................................................351
2. MiniUI(2017-11-23-lyq)....................................................................................................................................353
1. jQueryUI(2017-11-23-lyq)...............................................................................................................................354
2. Vue.js(2017-11-23-lyq).....................................................................................................................................355
3. AngularJS (2017-11-23-lyq)...........................................................................................................................357
第六章 数据库..................................................................................................................................................................................361
一、 Mysql...............................................................................................................................................................................361
1. SQL 的 select 语句完整的执行顺序(2017-11-15-lyq).................................................................................361
2. SQL 之聚合函数(2017-11-15-lyq)...................................................................................................................363
3. SQL 之连接查询(左连接和右连接的区别)(2017-11-15-lyq).................................................................363
4. SQL 之 sql 注入(2017-11-15-lyq) ...................................................................................................................364
5. Mysql 性能优化(2017-11-15-lyq)...................................................................................................................364
6. 必看 sql 面试题(学生表_课程表_成绩表_教师表)(2017-11-25-wzz)..................................................365
7. Mysql 数据库架构图(2017-11-25-wzz).........................................................................................................366
8. Mysql 架构器中各个模块都是什么?(2017-11-25-wzz)............................................................................367
9. Mysql 存储引擎有哪些?(2017-11-25-wzz).................................................................................................368
10. MySQL 事务介绍(2017-11-25-wzz).............................................................................................................369


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11. MySQL 怎么创建存储过程(2017-11-25-wzz)............................................................................................371
12. MySQL 触发器怎么写?(2017-11-25-wzz) ................................................................................................372
13. MySQL 语句优化(2017-11-26-wzz).............................................................................................................373
14. MySQL 中文乱码问题完美解决方案(2017-12-07-lwl) .............................................................................374
15. 如何提高 MySQL 的安全性(2017-12-8-lwl)...............................................................................................376
二、 Oracle..............................................................................................................................................................................378
1. 什么是存储过程,使用存储过程的好处?(2017-11-25-wzz) ...................................................................378
2. Oracle 存储过程怎么创建?(2017-11-25-wzz)............................................................................................379
3. 如何使用 Oracle 的游标?(2017-11-25-wzz)..............................................................................................380
4. Oracle 中字符串用什么连接?(2017-11-25-wzz)........................................................................................380
5. Oracle 中是如何进行分页查询的?(2017-11-25-wzz) ...............................................................................381
6. 存储过程和存储函数的特点和区别?(2017-11-25-wzz)............................................................................381
7. 存储过程与 SQL 的对比?(2017-11-21-gxb).....................................................................................................381
8. 你觉得存储过程和 SQL 语句该使用哪个?(2017-11-21-gxb) .......................................................................382
9. 触发器的作用有哪些?(2017-11-21-gxb)...........................................................................................................383
10. 在千万级的数据库查询中,如何提高效率?(2017-11-23-gxb).............................................................383
第七章 框架 ......................................................................................................................................................................................387
一、 SpringMVC....................................................................................................................................................................387
1. SpringMVC 的工作原理(2017-11-13-lyq)....................................................................................................387
2. SpringMVC 常用注解都有哪些?(2017-11-24-gxb)..................................................................................388
3. 如何开启注解处理器和适配器?(2017-11-24-gxb)....................................................................................388


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4. 如何解决 get 和 post 乱码问题?(2017-11-24-gxb).................................................................................388
二、 Spring..............................................................................................................................................................................389
1. 谈谈你对 Spring 的理解(2017-11-13-lyq)....................................................................................................389
2. Spring 中的设计模式(2017-11-13-lyq)..........................................................................................................389
3. Spring 的常用注解(2017-11-13-lyq)..............................................................................................................390
4. 简单介绍一下 Spring bean 的生命周期(2017-11-21-gxb) ......................................................................391
5. Spring 结构图(2017-11-22-lyq)......................................................................................................................392
6. Spring 能帮我们做什么?(2017-11-22-lyq) .................................................................................................394
7. 请描述一下 Spring 的事务(2017-11-22-lyq) ...............................................................................................395
8. BeanFactory 常用的实现类有哪些?(2017-12-03-gxb)............................................................................398
9. 解释 Spring JDBC、Spring DAO 和 Spring ORM(2017-12-03-gxb)..................................................399
10. 简单介绍一下 Spring WEB 模块。(2017-12-03-gxb).............................................................................399
11. Spring 配置文件有什么作用?(2017-12-03-gxb).....................................................................................400
12. 什么是 Spring IOC 容器?(2017-12-03-gxb)...........................................................................................400
13. IOC 的优点是什么?................................................................................................................................................400
14. ApplicationContext 的实现类有哪些? (2017-12-03-gxb)....................................................................400
15. BeanFactory 与 AppliacationContext 有什么区别(2017-12-03-gxb)................................................401
16. 什么是 Spring 的依赖注入?(2017-12-04-gxb) .......................................................................................401
17. 有哪些不同类型的 IOC(依赖注入)方式?(2017-12-04-gxb).............................................................401
18. 什么是 Spring beans? (2017-12-04-gxb)................................................................................................402
19. 一个 Spring Beans 的定义需要包含什么?(2017-12-04-gxb)..............................................................402


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20. 你怎样定义类的作用域? (2017-12-04-gxb)...............................................................................................403
21. Spring 支持的几种 bean 的作用域。(2017-12-04-gxb).........................................................................403
22. Spring 框架中的单例 bean 是线程安全的吗? (2017-12-04-gxb) ........................................................403
23. 什么是 Spring 的内部 bean?(2017-12-04-gxb).....................................................................................404
24. 在 Spring 中如何注入一个 java 集合?(2017-12-04-gxb).....................................................................404
25. 什么是 bean 的自动装配?(2017-12-04-gxb) ..........................................................................................404
26. 解释不同方式的自动装配 。(2017-12-04-gxb).........................................................................................404
27. 什么是基于 Java 的 Spring 注解配置? 给一些注解的例子(2017-12-05-gxb)....................................405
28. 什么是基于注解的容器配置? (2017-12-05-gxb)......................................................................................405
29. 怎样开启注解装配?(2017-12-05-gxb) ......................................................................................................405
30. 在 Spring 框架中如何更有效地使用 JDBC? (2017-12-05-gxb) ............................................................405
31. 使用 Spring 通过什么方式访问 Hibernate? (2017-12-05-gxb)...........................................................406
32. Spring 支持的 ORM 框架有哪些?(2017-12-05-gxb).............................................................................406
33. 简单解释一下 spring 的 AOP(2017-12-05-gxb) ......................................................................................406
34. 在 Spring AOP 中,关注点和横切关注的区别是什么?(2017-12-05-gxb)........................................407
35. 什么是连接点?(2017-12-05-gxb)...............................................................................................................407
36. Spring 的通知是什么?有哪几种类型?(2017-12-05-gxb) ....................................................................407
37. 什么是切点?(2017-12-05-gxb)...................................................................................................................408
38. 什么是目标对象? (2017-12-05-gxb) ...........................................................................................................408
39. 什么是代理? (2017-12-05-gxb)...................................................................................................................408
40. 什么是织入?什么是织入应用的不同点?(2017-12-05-gxb).................................................................408


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三、 Shiro ................................................................................................................................................................................408
1. 简单介绍一下 Shiro 框架(2017-11-23-gxb).................................................................................................408
2. Shiro 主要的四个组件(2017-12-2-wzz).........................................................................................................409
3. Shiro 运行原理(2017-12-2-wzz)......................................................................................................................410
4. Shiro 的四种权限控制方式(2017-12-2-wzz).................................................................................................411
5. 授权实现的流程(2017-12-2-wzz)....................................................................................................................411
四、 Mybatis...........................................................................................................................................................................412
1. Mybatis 中#和$的区别?(2017-11-23-gxb) ................................................................................................412
2. Mybatis 的编程步骤是什么样的?(2017-12-2-wzz)...................................................................................413
3. JDBC 编程有哪些不足之处,MyBatis 是如何解决这些问题的?(2017-12-2-wzz)..............................413
4. 使用 MyBatis 的 mapper 接口调用时有哪些要求?(2017-12-2-wzz)...................................................414
5. Mybatis 中一级缓存与二级缓存?(2017-12-4-lyq).....................................................................................414
6. MyBatis 在 insert 插入操作时返回主键 ID(2017-12-4-lyq)......................................................................415
五、 Struts2.............................................................................................................................................................................415
1. 简单介绍一下 Struts2(2017-11-24-gxb) ......................................................................................................415
2. Struts2 的执行流程了解么?(2017-11-24-gxb)...........................................................................................416
3. Struts2 中 Action 配置的注意事项有哪些?(2017-11-24-gxb) ...............................................................418
4. 拦截器和过滤器有哪些区别?(2017-11-24-gxb)........................................................................................419
5. Struts2 的封装方式有哪些?(2017-11-24-gxb)...........................................................................................419
6. 简单介绍一下 Struts2 的值栈。(2017-11-24-gxb).....................................................................................421
7. SpringMVC 和 Struts2 的区别?(2017-11-23-gxb)...................................................................................422


14
8. Struts2 中的 # 和 % 分别是做什么的?(2017-11-30-wzz)....................................................................423
9. Struts2 中有哪些常用结果类型?(2017-12-1-lyq) ......................................................................................424
六、 Hibernate.......................................................................................................................................................................424
1. 简述一下 hibernate 的开发流程(2017-11-24-gxb)....................................................................................424
2. hibernate 中对象的三种状态(2017-11-24-gxb)..........................................................................................425
3. hibernate 的缓存机制。(2017-11-24-gxb)..................................................................................................425
4. Hibernate 的查询方式有哪些?(2017-11-24-gxb).....................................................................................426
5. Hibernate 和 Mybatis 的区别?(2017-11-23-gxb)....................................................................................427
6. Hibernate 和 JDBC 优缺点对比(2017-11-29-wzz).....................................................................................427
7. 关于 Hibernate 的 orm 思想你了解多少?(2017-11-29-wzz).................................................................428
8. get 和 load 的区别?(2017-11-30-wzz)........................................................................................................429
9. 如何进行 Hibernate 的优化?(2017-11-30-wzz) .......................................................................................429
10. 什么是 Hibernate 延迟加载?(2017-12-1-lyq).........................................................................................430
11. No Session 问题原理及解决方法?(2017-12-4-lyq)................................................................................430
12. Spring 的两种代理 JDK 和 CGLIB 的区别浅谈(2017-12-4-lyq) .............................................................432
13. 叙述 Session 的缓存的作用(2017-12-9-lwl)..............................................................................................432
14. Session 的清理和清空有什么区别?(2017-12-10-lwl).............................................................................433
15. 请简述 Session 的特点有哪些?(2017-12-10-lwl)...................................................................................433
16. 比较 Hibernate 三种检索策略的优缺点(2017-12-10-lwl)......................................................................433
七、 Quartz 定时任务..........................................................................................................................................................434
1. 什么是 Quartz 框架(2017-12-2-wzz) ...........................................................................................................434


15
2.配置文件 applicationContext_job.xml 各个属性作用(2017-12-2-wzz)................................................434
3.Cron 表达式详解(2017-12-2-wzz)....................................................................................................................435
4. 如何监控 Quartz 的 job 执行状态:运行中,暂停中,等待中? (2017-12-2-wzz).......................435
第八章 最新技术..............................................................................................................................................................................436
一、 Redis................................................................................................................................................................................436
1. Redis 的特点?(2017-11-25-wzz)...................................................................................................................436
2. 为什么 redis 需要把所有数据放到内存中?(2017-11-25-wzz)................................................................436
3. Redis 常见的性能问题都有哪些?如何解决?(2017-11-25-wzz).............................................................437
4. Redis 最适合的场景有哪些?(2017-11-25-wzz)..........................................................................................437
5. Memcache 与 Redis 的区别都有哪些?(2017-11-25-wzz)......................................................................437
6. Redis 用过 RedisNX 吗?Redis 有哪几种数据结构?(2017-11-14-lyq) ................................................438
7. Redis 的优缺点(2017-11-22-lyq) ....................................................................................................................439
8. Redis 的持久化(2017-11-23-lyq) ....................................................................................................................440
二、 消息队列 ActiveMQ .....................................................................................................................................................442
1. 如何使用 ActiveMQ 解决分布式事务?(2017-11-21-gxb).......................................................................442
2. 了解哪些消息队列?(2017-11-24-gxb).........................................................................................................443
3. ActiveMQ 如果消息发送失败怎么办?(2017-11-24-gxb).........................................................................444
三、 Dubbo.............................................................................................................................................................................445
1. Dubbo 的容错机制有哪些。(2017-11-23-gxb)...........................................................................................445
2. 使用 dubbo 遇到过哪些问题?(2017-11-23-gxb) .....................................................................................446
3. Dubbo 的连接方式有哪些?(2017-12-1-lyq)...............................................................................................447


16
四、 并发相关..........................................................................................................................................................................450
1. 如何测试并发量?(2017-11-23-gxb).............................................................................................................450
五、 Nginx...............................................................................................................................................................................451
1. Nginx 反向代理为什么能够提升服务器性能?(2017-11-24-gxb) ...........................................................451
2. Nginx 和 Apache 各有什么优缺点? (2017-11-24-gxb).........................................................................451
3. Nginx 多进程模型是如何实现高并发的?(2017-12-5-lyq).......................................................................452
六、 Zookeeper.....................................................................................................................................................................453
1. 简单介绍一下 zookeeper 以及 zookeeper 的原理。(2017-11-24-gxb) ..............................................453
七、 solr...................................................................................................................................................................................454
1. 简单介绍一下 solr(2017-11-24-gxb).............................................................................................................454
2. solr 怎么设置搜索结果排名靠前?(2017-11-24-gxb).................................................................................454
3. solr 中 IK 分词器原理是什么?(2017-11-24-gxb) .......................................................................................455
八、 webService....................................................................................................................................................................455
1. 什么是 webService?(2017-11-24-lyq)........................................................................................................455
2. 常见的远程调用技术(2017-11-24-lyq) ..........................................................................................................455
九、 Restful.............................................................................................................................................................................456
1. 谈谈你对 restful 的理解以及在项目中的使用?(2017-11-30-wzz).........................................................456
第九章 企业实战面试题..................................................................................................................................................................457
一、 智慧星(2017-11-25-wmm)..................................................................................................................................457
1. 选择题...........................................................................................................................................................................457
2. 编程题...........................................................................................................................................................................460


17
二、 中讯志远科技(2017-11-26-wmm)...........................................................................................................................463
1. 问答题...........................................................................................................................................................................463
三、 腾讯(2016 年校招面试题 2017-11-29-wzy) ....................................................................................................467
1. 选择题...........................................................................................................................................................................467
四、 北京宝蓝德股份科技有限公司(2017-12-03-wmm)........................................................................................481
1.选择题.............................................................................................................................................................................481
2.问答题.............................................................................................................................................................................483
五、 智慧流(2017-12-04-wmm)..................................................................................................................................485
1.选择题.............................................................................................................................................................................485
2. 问答题...........................................................................................................................................................................490
3. 逻辑思维题..................................................................................................................................................................492
六、 某公司(2017-12-05-wmm).......................................................................................................................................495
1. 选择题...........................................................................................................................................................................495
2. 问答题...........................................................................................................................................................................505
七、 华胜天成(2017-12-11-wzy).................................................................................................................................521
1. 不定项选择题..............................................................................................................................................................521
2. 简答题...........................................................................................................................................................................532
八、 诚迈(2017-12-7-lyq) .............................................................................................................................................532
1. 选择题...........................................................................................................................................................................532
2. 判断题...........................................................................................................................................................................534
3. 简答题...........................................................................................................................................................................534


18
4. 编程题...........................................................................................................................................................................538
5. linux 试题.....................................................................................................................................................................542
6. 数据库试题..................................................................................................................................................................545
7. 应用服务器试题..........................................................................................................................................................545
九、 科大讯飞(2017-12-11-lyq)...................................................................................................................................547
十、 泰瑞(2017-12-16-wmm)......................................................................................................................................552
1. 笔试题...........................................................................................................................................................................552
2. 上机题...........................................................................................................................................................................553
十一、 文思创新(2017-12-17-wmm).......................................................................................................................................556
1. 什么叫对象?什么叫类?什么面向对象(OOP)? ..........................................................................................556
2. 相对于 JDK1.4,JDK1.5 有哪些新特性? ...........................................................................................................557
3. JAVA 中使用 final 修饰符,对程序有哪些影响?................................................................................................557
4. Java 环境变量 Unix/Linux 下如何配置?..............................................................................................................558
5. 写出 5 个你在 JAVA 开发中常用的包含(全名),并简述其作用。...............................................................559
6. 写出 5 个常见的运行时异常(RuntimeException)。....................................................................................560
7. 方法重载(overload)需要满足什么条件,方法覆盖/方法重写(override)需要满足什么条件?(二选一)
.............................................................................................................................................................................................560
8. 继承(inheritance)的优缺点是什么?...............................................................................................................561
9. 为什么要使用接口和抽象类?.................................................................................................................................562
10. 什么是自定义异常?如何自定义异常?..............................................................................................................563
11. Set,List,Map 有什么区别?.............................................................................................................................563


19
12. 什么叫对象持久化(OBJect PERSIstence),为什么要进行对象持久化?.........................................564
13. JavaScript 有哪些优缺点?...................................................................................................................................564
14. Jsp 有什么特点?.....................................................................................................................................................565
15. 什么叫脏数据,什么叫脏读(Dirty Read) .....................................................................................................566
第十章 项目业务逻辑问题 .............................................................................................................................................................566
一、 传统项目(2017-12-5-lyq).....................................................................................................................................566
1. 什么是 BOS?.............................................................................................................................................................566
2. Activity 工作流...........................................................................................................................................................567

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