What is time complexity of arrays sort?
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What is difference between list and array?
Write an algorithm to show the postfix expression with the input given as : a b + c d +*f ? .
Is merge sort better than quick?
Can a binary tree be empty?
Which is faster arraylist or hashmap?
Stack can be described as a pointer. Explain.
Tell me about the different sorting techniques.
What is weight balanced tree in data structure?
Why do we need to recycle?
What is difference between hashmap and hashtable?
What are the types of queues?
Why is null not allowed in concurrenthashmap?