1. You are given 100 log files each of size 1GB. in a few minutes how would you search through the log file for error code 500.

Expected unix commands as answer

2. https://leetcode.com/problems/number-of-1-bits

3. Top k largest elements : You are given a root directory and value k, the root directory has files and sub directories. Each file has one number on each line. Find the k largest elements from all the files in the root directory. (Not most frequent elements)

Gave a solution of parsing through sub directories in BFS style and adding elements to heap maintaing its size k

4. Create a interfaces and classes for Deck of Cards