What is 1d array?
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Is hashmap faster than arraylist?
Why is hashmap faster?
Does treeset remove duplicates?
What is array sort?
Can we put null value in hashmap?
Does treeset allow null values?
What are different sorting algorithms?
How will you check the validity of an expression containing nested parentheses?
What is stable sort?
Which is better hashmap or hashtable?
What is binary tree give example?
What is inplace sorting?