Why we use arraylist instead of linked list?
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Give one example of right rotation.
What is huffman’s algorithm?
What data structure would you mostly likely see in a non recursive implementation of a recursive algorithm?
What is the difference between hashmap and linkedhashmap?
Which is better hashset or treeset?
How many types of lists are there?
What is a treeset?
What sort of serious problems have you experienced, and how have you handled them?
What are some of the best practices relating to the java collection framework?
Which are the sorted collections?
Does treemap allow null keys?
Why might quick sort might be better than merge sort?