What is a memory leak in java?
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why the constructor should be used in class,if there is no constructor what will happen?
Can we sort array in java?
What are the different ways of implementing thread? Which one is more advantageous?
Is null or empty java?
Write a program to find the whether a number is an Armstrong number or not?
What is isa relationship?
Suppose if we have variable ' I ' in run method, if I can create one or more thread each thread will occupy a separate copy or same variable will be shared?
What is casting?
What is a ?
Explain OOPs concept.
Why strings in java are called as immutable?
String class is defined under which package in java?