What is a byte array?
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Why do we need wrapper classes?
what is the difference between ArrayList and Vector
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What are the main uses of this keyword?
If I have 1000 objects and my requirement is to sort them quickly, then which collection would you recommend and why?
What is a classloader in java?
How does arraylist size increase in java?
What is an Exception ?
What is a map? What are the implementations of map?
Why does my function print none?
Give a briefing on the life cycle of a thread.
What is lexicographically smallest string?
Difference between ?System.out.println? and ?System.error.println??