Is hashmap get thread safe?
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Is a hashset ordered?
Name few collections map implementations?
Let the G be a graph with 100 vertices numbered 1 to 100 Two vertices i and j are adjecnt if | i-j| =8 or | i-j| =12. The Number of connected components in G is ?
Define depth and height of a node?
What sorting algorithm should be used for sorting strings?
Given M x N matrix with sorted elements row wise and column wise, find elements?
Is hashtable fail fast?
Can arraylist contain null?
What is an ordered list?
What is a hash index?
Define terminal nodes in a tree?
What are different sorting algorithms?