What are the types of array operations?
Is hashmap ordered?
Why null is not allowed in treemap?
What are two types of sorting?
Explain linear linked implementation of Stack and Queue?
How do I push an element into a stack?
Explain about Merge Sort?
Write the importance of hashing?
An array having 100 elements have numbers from 1 to 99 randomly out of which any number is repeated. Find the repeated number in minimum time and space complexity.
How would you implement two stacks using a single array?
Describe full binary tree and complete binary tree.
Define path in a graph?
What are the different types of collections?