java interview questions: 21 important Java/J2EE interview questions

Wednesday, 2 November 2011

This following part will cover the most asked Java/J2EE interview questions during Java/J2EE interview.

So have a look on the same and do revise it when ever you go for the Java/J2EE interview questions interview.

Normally the Java’s interviewer starts with.....

What is the difference among JVM Spec, JVM Implementation, JVM Runtime?
What are JDK and JRE?
What is JIT?
What is a JVM heap?
What is sandbox?
What is Locale?
What is a ResourceBundle class?
How will you get the platform dependent values like line separator, path separator?
How does garbage collector decide which objects are to be removed? Can garbage collector be forced?
What is the final keyword denotes w.r.t class, method and variable?
What are the methods in Object?
Can you instantiate the Math class?
What is the difference between the instanceof and getclass, these two are same or not?
Can main method be declared final?
What is a native method?
Does Java provide any construct to find out the size of an object?
Is Empty .java file a valid source file?
Can a .java file contain more than one java classes?
What is the difference between an argument and a parameter?
What are the different scopes for Java variables?
What are wrapper classes?

Also see the following video on on FlyWeight Pattern which will help you to boost your interview preparation: -

Regards,

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java interview questions