Cars24 Services Private Limited interview experience Real time questions & tips from candidates to crack your interview
SDE - 1
Cars24 Services Private Limited
3 rounds | 11 Coding
problems
Selected Interview preparation journey
Preparation
Duration: 1 Month
Topics: Data Structures Algorithms, Javascript, System Design
Tip 1 : Get your JS fundamentals right (if applying for a Frontend role, https://javascript.info/ is a good start)
Tip 2 : Apart from preparing data structures, practise on the communication skills as well (prepare your introduction, be a good listener and on spot improvisation plays key roles)
Application process
Where: Other
Eligibility: No criteria
Tip 1 : highlight projects related to the job profile in your resume and mention what was your contribution in them precisely in 1/2 lines.
Tip 2 : Include URLs to applications/projects that you have build and your achievements/blog (if any)
Interview rounds
01
Round
Medium
Telephonic
Duration45 Minutes
Interview date2 Jan 2019
Coding problem2
It was in the mid day and since I applied for a Frontend role the discussion was majorly around data structure and bit of Javascript.
The interviewer was helping and good listener.
1. Merge Two Sorted Linked Lists
Moderate
15m average time
80% success
0/80
Asked in companies
You are given two sorted linked lists. You have to merge them to produce a combined sorted linked list. You need to return the head of the final linked list.
Note:
The given linked lists may or may not be null.
For example:
If the first list is: 1 -> 4 -> 5 -> NULL and the second list is: 2 -> 3 -> 5 -> NULL
The final list would be: 1 -> 2 -> 3 -> 4 -> 5 -> 5 -> NULL
Problem approach
1.I started with understanding the problem in depth first knowing what type of data are these linked list holding and if they are already sorted etc.
2.I gave a bootstrap approach to iterative compare and push the nodes to a new array.
3.After discussing on the possible solution finally came up with an optimised approach (Reversing lists approach)
2. Sort 0 1 2
Easy
22m average time
0/40
Asked in companies
You have been given an integer array/list(ARR) of size 'N'. It only contains 0s, 1s and 2s. Write a solution to sort this array/list.
Note :
Try to solve the problem in 'Single Scan'. ' Single Scan' refers to iterating over the array/list just once or to put it in other words, you will be visiting each element in the array/list just once.
02
Round
Medium
Face to Face
Duration60 Minutes
Interview date5 Jan 2019
Coding problem4
It was more of a in depth round on the framework I'm working on and problem solving.
1. Technical Question
What is event loop and what is it's significance.
2. Technical Question
Output based questions in Javascript ( using browser apis)
Problem approach
Tip 1 : Practise setTimeout and setInterval based questions, since they are most frequently asked questions
Tip 2 : Understand the event loop mechanism
3. System Design Question
Design a list of elements with properties like images, date, title etc in each item.
4. System Design Question
Designing system to support localisation in the mobile app.
03
Round
Hard
Face to Face
Duration75 Minutes
Interview date7 Jan 2019
Coding problem5
It was more of a fitment/managerial round.
Didn't had any coding questions, but was asked more on approaches and optimisations.
Discussions on the project you have worked on.
1. Puzzle
Find the fastest 3 horses.
Problem approach
Tip 1 : Before going through the solution on online platforms, try to solve it on your own
Tip 2 : Along with the DS preparations, try to solve 2/3 puzzles daily
2. Technical Question
How to debug a root cause of lag on a screen
3. System Design Question
Explain the architecture of the app you have recently worked on.
4. Technical Question
1.Difference between rendering on Scrollview vs Flatlist ? Have you used worked with RecyclerListView?
5. Technical Question
How does React Native works internally, how many threads are running currently.
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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