Ultimate Java Interview Guide|書籍線上App不用買-HotApp4Game

The Ultimate Java Interview Guide is a comprehensive collection of more than 130 interview questions for core Java. Each question has detailed answers, along with relevant code snippets. The questions have been carefully selected to cover a wide range of topics on both theoretical aspects and practical best practices of Java coding.

This app is a handy guide for refreshing your Java knowledge with the key concepts and tricky areas that will help you ace any Java interview.

Following topics are covered:

1. Object Oriented Programming – basic concepts, including encapsulation, polymorphism, abstraction, association and composition.

2. Classes, Objects and Interfaces – constructors, abstract classes, static classes and method, inner classes

3. Java Keywords and Operators – java access modifiers, final, synchronized, volatile keywords, use of this and super keywords, java annotations

4. Java String Class – string comparision, manipulations, StringBuffer and StringBuilder classes, immutability

5. Collections – Iterators, Enumerators, HashMap, ArrayList, Lists, Sets, Maps, concepts of generics, type erasure etc.

6. Java Serialization and File I/O - Concepts of serialization and Serializable interface, transient variables, File class, byte streams and character streams, Reader/Writer and the InputStream/OutputStream classes, I/O filter

7. Threads and Synchronization - Synchronized method vs synchronized block, Thread and Runnable interfaces, concepts of deadlock, livelock and atomic variables

8. Exception and Error Handling - try, catch and finally blocks, throw and throws keyword, Checked Exceptions vs. Errors vs. Runtime exceptions

9. Java Reflection API – concept of reflection, advantages and disadvantages, use cases

10. Java Virtual Machine (JVM) - Concepts of garbage collection, finalize methods, strong, weak and phantom references, memory leak, JIT compilation, Java HotSpot