OLX Group interview experience Real time questions & tips from candidates to crack your interview
SDE - 2
OLX Group
4 rounds | 5 Coding
problems
Selected Interview preparation journey
Preparation
Duration: 2 Months
Topics: Data Structures & Algorithms, System design, Database scaling, NodeJs advanced
Tip 1 : Practice medium level questions for DS algo
Tip 2 : Core tech skills & high scale system design are must
Application process
Where: Other
Eligibility: 3 year experience
Tip 1 : Don't just show your past experience/ projects but instead showcase impact of your work on those projects. Example: Due to this company was able to double the customer retention rate from 4.5 million to 9.5 million.
Tip 2 : Keep it simple short & to the point
Interview rounds
01
Round
Medium
Video Call
Duration60 Minutes
Interview date5 Jan 2021
Coding problem1
It was directly with the Director of Engineering who asked questions on system designing and where he judged I'm suitable for which role.
1. System Design Question
He gave problem regarding communication between microservices & to build a report generation system.
02
Round
Medium
Video Call
Duration60 Minutes
Interview date8 Jan 2021
Coding problem2
It was loaded with some DS algo questions and some authentication related questions.
1. Technical Questions
some questions related to JWT authentication & use of Redis db
2. Trapping Rain Water
Moderate
15m average time
80% success
0/80
Asked in companies
You have been given a long type array/list 'arr’ of size 'n’.
It represents an elevation map wherein 'arr[i]’ denotes the elevation of the 'ith' bar.
Print the total amount of rainwater that can be trapped in these elevations.
Note :
The width of each bar is the same and is equal to 1.
Example:
Input: ‘n’ = 6, ‘arr’ = [3, 0, 0, 2, 0, 4].
Output: 10
Explanation: Refer to the image for better comprehension:
Note :
You don't need to print anything. It has already been taken care of. Just implement the given function.
03
Round
Medium
Video Call
Duration60 Minutes
Interview date15 Jan 2021
Coding problem1
It was mainly CODE LIVE round.
Where we worked on creating a project from scratch, I was asked to create Google Calendar APIs.
And was asked to write UT/IT
1. System Design Question
Create Google Calendar APIs
Problem approach
I selected MySQL as my database
Designed schema
Used NodeJs & expressjs to build API in rest
04
Round
Easy
HR Round
Duration30 Minutes
Interview date21 Jan 2021
Coding problem1
I was briefly told about company & it's verticals.
OLX as a group is exploring on various stuff so have multiple projects going on.
I was also explained about my role & project I will be handling.
I was asked about my expectations
1. Basic HR Questions
What are your expectations from company
Are you able to communicate well & on time raising a flag if you have a problem
Here's your problem of the day 
Solving this problem will increase your chance to get selected in this company
Skill covered: Programming
How do you remove whitespace from the start of a string?
Choose another skill to practice
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