What is structure of java heap? What is perm gen space in heap?
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Which package is always imported by default?
What is consumer interface?
Explain a few methods of overloading best practices in java?
When we should use serialization?
can u override the start() method of Thread class
What is difference between hash mapping and hash table?
What is a variable and constant?
What is the use of join method?
What is busy spin, and why should you use it?
what are the major differences between jdk1.4 and jdk1.5?
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What java ide should I use?
What is the difference between the size and capacity of a vector?