How hashmap works in java?
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How do you clear an arraylist in java?
What are the types of inner classes (non-static nested class) used in java?
Explain yield() method in thread class ?
How to reverse a string in java?
What are the performance implications of interfaces over abstract classes?
What is == mean?
Can we clone singleton class in java?
What is the synchronized method modifier?
Why chararray() is preferred over string to store the password?
What value is a variable of the string type automatically initialized?
Why string is not thread safe?
worst case complexities of Quick sort and Merge sort.