Define in brief an array.
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How would you sort a linked list?
Why is null not allowed in concurrenthashmap?
Are duplicates allowed in hashmap?
Why does hashset use hashmap?
On clicking a node in a tree, all the adjacent edges are turned on. Calculate min of clicks such that all the edges are turned on.
How to find 3rd element from end in a linked list in one pass?
Is there any difference between int[] a and int a[]?
Differentiate between priorityqueue and treeset.
Explain the term binding time?
Explain binary tree traversals?
Are duplicates allowed in list?
What is the difference between hashmap and arraylist?