Java程序员进阶必练题

No

Topic

Summary

1

JVM basic concept

1. What's is JVM
2. Concept of JVM, JDK, JRE
3. HotSpot
4. Reference type
5. Garbage Collection

2

How to create new object in Java

1. new
2. deseriablize
3. clone
4. reflect

3

Serializable

1. Official definition
2. Why this interface is introduced.
3. When serialized to Persistent status, which is saved, the class or the object? 
4. How to deal the case when property is an object?
5. How to do rollback the object?
6. Why need set serialVersionUID?
7. What's means of externalizable?

4

Transient

1.official definition, should from Java Spec
2. why this keyword is introduced
3. Can be applied to local variable? Static variable? Method? Class?
4. Use example to express
5. Typical purpose

5

Shadow clone vs deep clone

1. Official definition 
2. Why need clone? Any difference between these 2 types?

6

native

1.official definition, should from Java Spec
2. why this keyword is introduced 
3. Typical usage
4. Example

7

final

1. Official definition 
2. Why this interface is introduced. 
3. What's means of final variable, final method, final class.
4. Typical usage.

8

Volatile

1.official definition, should from Java Spec
2. why this keyword is introduced 
3. Typical usage

9

synchronized

1. Official definition 
2. Why this key word is introduced. 
3. What's means of critical resource, how to avoid competition
4. Give example when applied to method, class

10

MultiThread

1. Multithread code sample
2. Concurrent package in java src

11

How to implement Connection Pool

1. What's connection pool, target
2. The normal connection pool setting
3. How to implement

12

Class and object

1. Inner class
2. anonymous class
3. static class

13

Java similar technology and language

1. Java, .net, c#
2. Groovy, Ruby, Ruby on Rails
3. Python, Scala

14

mutex, futex, spin lock

1. Need know the basic term.
2. Need understand the background knowledge

15

Concurrent

1. Java.concurrent package
2. SynchronizedMap and Map.synchronize method
3. BlockingQueue

16

Generic

1. PECS: Produce Extended, Comsumer Super

17

Collection

1. Map, List, Vector, Set
2. Synchornized and Asynchornized
3. Thread-safe and thread-unsafe