What is the difference between for and foreach loop?
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Can arraylist have duplicates?
If you have to store one lakh objects, what will be a better option- a hash map or an array list?
What is quick sort example?
How many different binary trees and binary search trees can be made from three nodes that contain the key values 1, 2 & 3?
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Will hashmap allow null keys?
Can binary tree have 1 child?
What are the different types of data structures explain briefly?
You are given a singly linked list. How would you find out if it contains a loop or not without using temporary space?
What are the advantages and disadvantages of copyonwritearraylist?
Why is sorting necessary?
Which is the simplest file structure?
In what order the elements of a hashset are retrieved?