How do you implement a stack?
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Can we use any class as map key?
What is significance of ” * ” ?
Does arraylist extend list?
Explain quick sort and merge sort algorithms and derive the time-constraint relation for these.
For addition and deletion. Which one is most preferred: array list or linked list?
Is hashmap faster than arraylist?
Will hashmap allow null keys?
What is the best sorting technique?
How many sorting techniques are there?
How many sorting algorithms are there?
What is data structure explain in detail?
Why is quicksort not stable?