Zscalar interview experience Real time questions & tips from candidates to crack your interview
SDE - 1
Zscalar
4 rounds | 7 Coding
problems
Rejected
Interview preparation journey
Journey
The pre-placement season is always a thriller for any undergrad and it goes the same for me. I was well prepared with all the requirements of the role for which the organization came for placements. I was a little disappointed that the organization has taken one OA round and 2 DSA rounds despite that they canceled the drive because of no reason.
Application story
Zscalar Drive came on campus for three different roles: developer, DevOps, and dev-test roles for an internship with PPO offers. Based on the results of the first OA round and resume shortlisting, they divided the qualified students into each role separately.
Why selected/rejected for the role?
I, along with four other students, was not selected as the drive was canceled for the DevOps role after three rounds without any explanation.
Preparation
Duration: 3 months
Topics: Data Structures, Algorithms, OOPs, System Design, Computer Networks, Cloud Computing, Postman
Tip 1: Revise the core subjects of computer science.
Tip 2: Focus on cloud computing and computer network fundamentals.
Tip 3: Have some knowledge about testing tools.
Tip 4: Have a better understanding of your projects.
Application process
Where: Campus
Eligibility: 7 CGPA
Tip 1: Highlight your projects and the skills used in them.
Tip 2: Mention only the items that you have a better understanding of.
Interview rounds
01
Round
Medium
Online Coding Interview
Duration90
Interview date16 Nov 2022
Coding problem3
It was the first OA round in the afternoon at my institute.
1. Sorting Strings by Sum of Name Length and Roman Numeral Value
Moderate
30m average time
60% success
0/80
Asked in companies
A list of strings consisting of names followed by a space and Roman number, we need to sort the list on the basis of their sum equals name length and Roman value.
Ex: string s[] = {“John VII”, David V, John V, Henry VI, Henry IV};
Problem approach
Tip 1: Use a sorting algorithm having the best time complexity.
2. 2D matrix
Easy
10m average time
90% success
0/40
Asked in companies
A 2D matrix is given and we need to eliminate the maximum element in each round.
Problem approach
Tip 1: The use of a stack for sorting the maximum element will be good.
3. Counting Substrings with Exactly k Different Characters
Moderate
15m average time
85% success
0/80
Asked in companies
Given a string having values from 0 to 9, we need to find the number of substrings in which the different characters occurred exactly k times.
Problem approach
Tip 1: The use of a hashing algorithm will be best here.
02
Round
Medium
Video Call
Duration45
Interview date17 Nov 2022
Coding problem2
It was the second round in the afternoon at the Institute on next day after the first OA round.
1. Interview Highlights: Self-Presentation and Project Discussions
~ Asked about myself.
~ Asked about my projects how I made those and the techs I used in them.
Problem approach
Tip 1: Introduce yourself nicely and clearly.
Tip 2: Explain your projects in detail, such as the idea behind each project, the problems faced during development, and how you tackled them.
2. Technical Interview Insights: OOPs in C++ and Core Computer Science Topics
~ Asked about the OOPs concept in C++.
~ Asked questions related to Data Structures, Computer Networks, Operating Systems, and DBMS.
Problem approach
Tip 1:Ensure clarity in your understanding of the OOPs concept in your primary language; mine is C++.
Tip 2: Be well-prepared with the fundamentals of computer science before the interview.
Tip 3:If you don't know the answer, please don't provide incorrect information. You can check it after the call.
03
Round
Medium
Video Call
Duration45
Interview date18 Nov 2022
Coding problem2
It was the third round in afternoon at Institute. Hopefully I made it till here.
1. Shopping Website Design & Git Commands
~ Asked about the low-level design of a shopping website like Flipkart.
~ Asked questions from git - commit, push, and pull.
Problem approach
Tip 1: Be prepared to discuss the low-level design of the projects mentioned on your resume.
Tip 2: Familiarize yourself with Git and GitHub.
2. Postman
~ Asked questions related to testing tools like Postman.
~ Asked about different types of requests we make from Postman.
~ Asked about how I have tested my projects after development.
Problem approach
Tip 1: Be prepared for the testing tools that you require for testing your projects.
Tip 2: Postman is the primary tool, have an understanding of how to use it.
04
Round
Easy
HR Round
Duration15
Interview date19 Nov 2022
Coding problem0
It was the HR round in the evening at the Institute.
Here's your problem of the day 
Solving this problem will increase your chance to get selected in this company
Skill covered: Programming
What is recursion?
Choose another skill to practice
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