Why do we use sorting?
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What is array and its types with example?
What is the difference between arrays sort and collections sort?
What is difference between hashmap and hashset?
Check if duplicates exist in an array of N which has range 1 to N.
How do you sort pseudocode?
Explain pre-order and in-order tree traversal.
How does the size of arraylist increases dynamically?
What does map stand for?
Can arraylist be empty?
Given M x N matrix with sorted elements row wise and column wise, find elements?
How efficient is binary search?
State the rules to be followed during infix to postfix conversions?