What is collection api?
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How do you declare a string variable?
What is the use of collections in java? How it is implemented in real time applications?
Can a abstract class be declared final?
How does queue work in java?
Why stringbuffer is faster than string?
How do you reverse sort in java?
Why does java have two ways to create child threads?
1) Find the Merge point of two linked lists. 2) Swap two bits of integer. 3) Reverse individual words of the sentence. 4) Reverse string without using temp string.
When does a class need a virtual destructor?
What primitive Java types? Howmany are they and what are their names?
How could Java classes direct program messages to the system console, but error messages, say to a file?
Is 'sizeof' a keyword?