Why do we need variables?
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Is null a string?
What are packages in java?
Why are inner classes required?
Can an unreachable object become reachable again?
Which non-unicode letter characters may be used as the first character of an identifier?
how u do unit testing?
How is hashset defined in java?
wht is customised exception?
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How many types of classes are there in java?
What data type is true or false?
What is boolean in java?
What is the += operator called?