Is it safe for adding 10,00,000 records/objects to HashMap?, i.e is it safe to add millions of objects to HashMap?
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Why hashset is used in java?
Is string is a keyword in java?
Explain about varargs in java?
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What does int [] mean in java?
What are the differences between wait() and sleep()?
What languages are pass by reference?
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which pattern is default in scanner package?
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When to use runnable interface vs thread class in java?
Differentiate between static and non-static methods in java.
What is gc()?
What are the fileinputstream and fileoutputstream?