what is polymorhism what is inheritance? what is Abstract n Interface? what if two interfaces have same method and a concrete class is implementing both the interfaces. Will there be a compilation error? What are mutable and immutable classes? How can u make a class mutable? when will u use dem ...explain with example? what is overriding and overloading? what is garbage collection? what is Thread? how do dey communicate? what are the different ways of implementing ? have u used any messaging technologies? what is synchronization? what are some additions in java 1.5? what are generics? whst is advanced for loop? what is finally block? can u have a try in finally? yes!! can u have a finally in finally? how do you write junits? when is a object eligible for garbage collection?explain? a = null and b has ref to a will b be eligible to be garbage collected? sql questions like diff joins? how do dey work? exception handling? what is marker interface? what is the need??

0 Answers   JPMorgan Chase,

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What is stringbuffer in java?

0 Answers  

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When you declare a method as abstract method ?

2 Answers   HP,

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What is javac used for?

0 Answers  

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How to prevent to create multiple objects of a java class?

3 Answers   ASD Lab, TCS,

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What are the types of classes in java?

4 Answers   HCL,

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What are reference variables in java?

0 Answers  

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What is meant by stack and queue?

0 Answers   GrapeCity,

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Differentiate between class and structure.

0 Answers   Amdocs, Motorola,

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What is the top class of AWT event hierarchy?

5 Answers  

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What is boolean query?

0 Answers  

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In method overloading ,if i change the return type to Long instead of INT,is the program execute

6 Answers   HCL,

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