OLX Group interview experience Real time questions & tips from candidates to crack your interview

SDE - 1

OLX Group
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3 rounds | 6 Coding problems

Interview preparation journey

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Journey
My journey started when I was in class 12th and my teacher guided me to take part in the coding competitions that are hosted by codechef. After that I started participating in them and developed a habit of doing coding questions.
Application story
I applied to this company throw the on-campus opportunity as my college is a tier 1 college this company always visit my college for hire.
Why selected/rejected for the role?
I was rejected because i was not able to explain all the concept with the correct accuracy.
Preparation
Duration: 4 months
Topics: Data Structures, Pointers, OOPS, System Design, Algorithms, Dynamic Programming
Tip
Tip

Tip 1 : Regarding DSA preparation, I have a theory. 20 percent of the questions will be asked in 80 percent of the interview and 80 percent of the questions will be asked in 20 percent of the interviews. In short, some questions have a very high chance of coming up during the interviews and some have very low chance. We should focus more on the questions that have more chance of coming up in the interview. You can find these questions on Striver SDE Sheet, InterviewBit, Leetcode 100 most liked, Leetcode 100 most important.

Application process
Where: Campus
Eligibility: Above 7 CGPA
Resume Tip
Resume tip

Tip 1: Make Sure that your resume is simple and also try to fit all the information on only one page.
Tip 2: Have at least 2 projects with the latest technologies, Github link of projects should be provided

Interview rounds

01
Round
Medium
Video Call
Duration60 mins
Interview date9 Feb 2023
Coding problem2

1. Detect and Remove Cycle

Easy
10m average time
90% success
0/40
Asked in companies
WalmartOracleGoldman Sachs

You have been given a Singly Linked List of integers, determine if it forms a cycle or not. If there is a cycle, remove the cycle and return the list.

A cycle occurs when a node's ‘next’ points back to a previous node in the list.

Problem approach

Detect cycle in a linked list.

use the slow and fast pointers

Try solving now

2. Find Pairs

Easy
18m average time
75% success
0/40
Asked in companies
Goldman SachsBank Of AmericaGrant Thornton

We are given a sorted doubly-linked list which contains distinct positive integers, and an integer ‘X’. Print all such unique pairs from the given list so that their sum is equal to ‘X’.

Problem approach

You have been given an integer array/list(arr) and a number 'Sum'. Find and return the total number of pairs in the array/list which when added, results equal to the 'Sum'.

Try solving now
02
Round
Easy
Video Call
Duration60 mins
Interview date9 Feb 2023
Coding problem2

1. Delete a Node from Linked List

Moderate
40m average time
67% success
0/80
Asked in companies
CIS - Cyber InfrastructureAmazonGroww

You have been given a linked list of integers. Your task is to write a function that deletes a node from a given position, 'POS'.

Note :
Assume that the Indexing for the linked list always starts from 0.

If the position is greater than or equal to the length of the linked list, you should return the same linked list without any change.
Illustration :
The following images depict how the deletion has been performed.

Image-I :

Alt txt

Image-II :

Alt txt

Problem approach

You have been given a linked list of integers. Your task is to write a function that deletes a node from a given position, 'POS'.

Try solving now

2. Inplace rotate matrix 90 degree

Easy
12m average time
80% success
0/40
Asked in companies
OLX GroupSalesforceUrban Company (UrbanClap)

You are given a square matrix of non-negative integers of size 'N x N'. Your task is to rotate that array by 90 degrees in an anti-clockwise direction without using any extra space.

For example:

For given 2D array :

    [    [ 1,  2,  3 ],
         [ 4,  5,  6 ],
         [ 7,  8,  9 ]  ]

After 90 degree rotation in anti clockwise direction, it will become:

    [   [ 3,  6,  9 ],
        [ 2,  5,  8 ],
        [ 1,  4,  7 ]   ]
Problem approach

You are given a square matrix of non-negative integers 'MATRIX'. Your task is to rotate that array by 90 degrees in an anti-clockwise direction using constant extra space.

Try solving now
03
Round
Easy
HR Round
Duration30 mins
Interview date9 Feb 2023
Coding problem2

1. Basic HR Questions

Why OLX?
Tell me about yourself.

Problem approach

The OLX marketplace is a platform for buying and selling services and goods such as electronics, fashion items, furniture, household goods, cars and bikes.

2. Basic HR Questions

Why should I hire you?
What are your strengths and weaknesses?
Why do you want to work at our company?

Problem approach

I want to be a part of this well-organized company for new developments. And I want to prove myself to get profits of projects in your company.

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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