CarWale Interview Experience (On-Campus 2022)

First Round: It was on Hackerrank. We were given 4 coding questions which were random for all. 

• Some of the coding questions that I got are as follows: 
• First question was about Compliance Priorities
• Second question was based on Device Name System
• Third question was based on Perfect Pairs: A pair of integers (x, y) is perfect if both of the following conditions are met:

• min(|x-y|,|x+y|) <=min(|x|,|y|)
  max(|x-y|,|x+y|) >=max(|x|,|y|)
  

• Given an array arrof length n, find the number of perfect pairs arr[i], arr[j] where 0 i < j < n.
• Fourth and the last question was on Grid Traversal: In this question, the coder had to find a minimum number of jumps from the start point to the endpoint. 
  I was able to solve 2 problems fully and 1 problem partially. 

Second Round:  This was a technical interview round conducted offline in our campus. The interviewer asked the following questions:

Duration: 1 hour

1. Tell me about yourself
2. How do you rate yourself in Data Structures in the scale of 1 – 10.
3. Programming language discussion (c++,java,python)

After that, the interviewer asked 2 coding questions:

• Find-the-celebrity – Graph (GFG Medium – https://www.geeksforgeeks.org/problems/the-celebrity-problem) Find a person from n number of people whom everyone knows but he knows no-one, given relation between 2 numbers.
• Binary-tree-cameras Binary Tree (Leetcode Hard –  https://leetcode.com/problems/binary-tree-cameras/) Find minimum number of cameras required for getting coverage of all nodes from the binary tree, given 1 camera at any node only monitors it’s 1st child or 1st parent.

  At first, I explained the brute force approach and then the interviewer asked me to further optimize the approach

• Discussion on projects, which technologies used? why? what is laravel? different technologies? 
• Do you have any questions for me?

Tips: Interview will be scheduled the next day after the coding test. So prepare for the interview beforehand. In our case we gave test at 2 pm the results were declared around 11 pm, and at 2 am we were asked to be ready at 8:30 am sharp the very next day.

I didn’t get selected for further rounds. But it was a nice experience since it was my first offline – in person interview.