Hacker Rank Test

1. Question similar to https://leetcode.com/problems/pairs-of-songs-with-total-durations-divisible-by-60/
2. Variant of cherry pickup https://leetcode.com/problems/cherry-pickup/

First Round

1. Parenthesis pattern evaluation problem (Pattern may contain any number of * which can be interpreted as either ‘(‘ or ‘)’ or empty character.
2. Asked questions on Java oops concepts, multithreading, spring boot, spring bean scopes, dependency injection, java string interning, etc.
3. Asked to implement a thread safe Singleton class.

Cancelled other rounds.