Which are the sorted collections?
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which notations are used in evaluation of arithmetic expressions using prefix and postfix forms?
Which sorting algorithm has minimum number of swaps?
Parenthesis are never needed in prefix or postfix expressions. Why?
Can hashtable have duplicate values?
Is hashmap get thread safe?
Can treeset contain duplicates?
Which is faster hashmap or linkedhashmap?
What is a stable algorithm?
What is the default size of an arraylist?
Explain stacks and queues in detail.
Which sorting method is slowest?
List the two important key points of depth first search?