Following are commonly asked Java questions in Technicial Interview

Use of volatile and transient modifiers?

Why would you use a synchronized block vs. synchronized method?

waht are heavy weight and light weight components?

Is JVM platform dependent?

What is TEBCO? What it is used for? How it is related to MQ-Series

How can you force garbage collection?

Can you write a Java class that could be used both as an applet as well as an application?

How would you call a static block in one class from another class?. And is it possible to call a
free floating?

which frame work is better in realtime i.e(struts or spring framework)?

GetOnbytes() method,explain?

Why JAVA does not have POINTERS?

Explain the usage of the keyword transient?

Can we have more than one connection object with database at same time?

what is the System , out in the System.out.println( "MSG");

How can we call multiple applications using simple command in java

What's the "performance" difference between i++ and ++i?

Performance difference between i++ and ++i? Considering the following 2 conditions.1. i++;

What are the difference between Java & C++?

Main drawback of C++?

What do you meant by HashMap in Java

How can you increase the JVM memory?

Can HashMap store null values?If yes, how many and in which one?

How we upload and download files in JSP and Servlets ,What methods we are using?

Can you call one constructor from another if a class has multiple constructors

If a class is located in a package, what do you need to change in the OS environment to be able to use it?

How can a subclass call a method or a constructor defined in a superclass?

If you’re overriding the method equals() of an object, which other method you might also consider?