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2018最新最全java高级工程师面试题
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Java作为一门广泛使用的编程语言,其高级工程师面试题往往涵盖了多方面的知识点,旨在考察候选人的技术深度、广度以及实际问题解决能力。2018年最全的Java高级工程师面试题集锦,包含了十几个文档,可以预见这些文档将涵盖JVM原理、并发编程、设计模式、数据结构与算法、Spring框架、数据库设计与优化、网络协议等多个领域。 1. **JVM(Java虚拟机)** - 类加载机制:了解双亲委派模型,类加载器的职责,以及如何自定义类加载器。 - 内存模型:堆内存、栈内存、方法区(元空间)的结构与作用,以及内存溢出问题的分析与解决。 - 垃圾回收:GC的工作原理,垃圾收集器类型,新生代与老年代的划分,Stop-the-world事件的理解。 - 调优:JVM参数设置,如何进行性能调优,如调整堆大小、新生代与老年代的比例等。 2. **并发编程** - 线程池:线程池的工作原理,ExecutorService接口的使用,以及线程池参数的配置与优化。 - 锁机制:synchronized关键字、Lock接口(ReentrantLock)的使用,读写锁(ReentrantReadWriteLock),以及锁优化。 - 并发工具类:ConcurrentHashMap、BlockingQueue、CountDownLatch、CyclicBarrier、Semaphore等的使用场景与实现原理。 3. **设计模式** - 创建型模式:单例模式、工厂模式、建造者模式、原型模式等,以及它们在实际项目中的应用。 - 结构型模式:适配器模式、装饰器模式、代理模式、桥接模式、组合模式等。 - 行为型模式:策略模式、观察者模式、模板方法模式、责任链模式等。 4. **数据结构与算法** - 常见数据结构:数组、链表、栈、队列、树、图、哈希表等的特性及操作。 - 排序算法:快速排序、归并排序、堆排序、冒泡排序、插入排序等的时间复杂度与稳定性。 - 查找算法:二分查找、哈希查找、二叉搜索树等。 5. **Spring框架** - Spring核心:依赖注入(DI)、面向切面编程(AOP)、Bean管理。 - Spring MVC:请求处理流程、ModelAndView、视图解析、拦截器等。 - Spring Boot:自动配置、起步依赖、健康检查、Actuator等特性。 - Spring Cloud:服务发现、负载均衡、熔断、降级等微服务相关技术。 6. **数据库设计与优化** - SQL查询优化:索引、JOIN操作、子查询、存储过程的优化。 - 数据库设计:范式理论、数据库规范化、数据冗余问题。 - 分布式数据库:CAP理论、BASE理论,分布式事务的解决方案。 7. **网络协议** - TCP/IP五层模型:物理层、数据链路层、网络层、传输层、应用层的协议与功能。 - HTTP/HTTPS:工作原理、报文结构、状态码、请求方法。 - WebSocket:用于建立持久连接的新一代通信协议。 每个领域的知识点都需要深入理解和实践,以应对面试中的各种挑战。同时,对新技术的关注和学习也是成为优秀Java高级工程师的关键。通过深入研究这些面试题,不仅可以为面试做准备,更能提升自身的技术水平。
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