What is the purpose of thread?
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What do you mean by collision in hashing?
Briefly explain recursive algorithm?
Which is better hashmap or arraylist?
Treemap orders the elements on which field?
Check if duplicates exist in an array of N which has range 1 to N.
Stack can be described as a pointer. Explain.
What is the best time complexity of bubble sort?
What is Another name of Dynamically allocating memory.
Explain pre-order and in-order tree traversal.
Which is faster hashmap or concurrenthashmap?
Differentiate between iterator and listiterator.
How do I push an element into a stack?