Which is better hashmap or hashtable?
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What is space complexity of a program?
Parenthesis are never needed in prefix or postfix expressions. Why?
What are the disadvantages of using collection classes over arrays?
Is arraylist heterogeneous?
How is heap sort implemented?
Mention a few applications of linked lists?
Explain the implementation of an AVL tree and Binary tree.
Why do we use dynamic arrays?
What is collections singletonmap?
Is arraylist better than array?
You want to insert a new item in a binary search tree. How would you do it?
What is difference between hashmap and hashtable?