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CARS24 Software Developer Interview Questions, Process, and Tips

Updated 15 Nov 2024

Top CARS24 Software Developer Interview Questions and Answers

  • Q1. Merge Two Sorted Linked Lists Problem Statement You are provided with two sorted linked lists. Your task is to merge them into a single sorted linked list and return the ...read more
  • Q2. Sort 0 1 2 Problem Statement Given an integer array arr of size 'N' containing only 0s, 1s, and 2s, write an algorithm to sort the array. Input: The first line contains ...read more
  • Q3. You need to find the fastest 3 horses out of a group, given that you can only race 5 horses at a time. How would you approach this problem?
View all 12 questions

CARS24 Software Developer Interview Experiences

4 interviews found

Interview experience
2
Poor
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. Implement an immutable class.
  • Ans. 

    An immutable class is a class whose instances cannot be modified after creation.

    • Use final keyword for class declaration to prevent inheritance

    • Make all fields private and final to prevent modification

    • Do not provide setter methods, only getter methods should be used

  • Answered by AI
  • Q2. Implement a springboot service that intercepts http requests.
  • Ans. 

    Implement a Springboot service to intercept HTTP requests.

    • Create a Springboot application with necessary dependencies.

    • Implement a custom interceptor by extending HandlerInterceptorAdapter.

    • Override preHandle and postHandle methods to intercept requests and responses.

    • Register the interceptor in the WebMvcConfigurerAdapter configuration class.

  • Answered by AI

Skills evaluated in this interview

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Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Job Portal and was interviewed in May 2024. There was 1 interview round.

Round 1 - Coding Test 

Dsa question based on dp

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Software Developer Interview Questions & Answers

user image siddharth jain

posted on 27 Oct 2023

Interview experience
3
Average
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all Resume tips
Round 2 - Technical 

(2 Questions)

  • Q1. Implementation of LRU cache
  • Ans. 

    LRU cache is a data structure that stores the most recently used items, discarding the least recently used items when full.

    • Use a doubly linked list to keep track of the order of items based on their usage.

    • Use a hash map to quickly access items in the cache.

    • When a new item is accessed, move it to the front of the linked list. If the cache is full, remove the item at the end of the list.

  • Answered by AI
  • Q2. Implementation of HashMap
  • Ans. 

    HashMap is a data structure that stores key-value pairs and allows for fast retrieval of values based on keys.

    • HashMap is implemented using an array of linked lists or a balanced tree to handle collisions.

    • It uses a hash function to map keys to indices in the array.

    • Example: HashMap map = new HashMap<>(); map.put("key", 123); int value = map.get("key");

  • Answered by AI

Skills evaluated in this interview

I was interviewed before Apr 2021.

Round 1 - Telephonic Call 

(2 Questions)

Round duration - 45 Minutes
Round difficulty - Medium

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.

  • Q1. 

    Merge Two Sorted Linked Lists Problem Statement

    You are provided with two sorted linked lists. Your task is to merge them into a single sorted linked list and return the head of the combined linked list.

    ...
  • Ans. 

    Merge two sorted linked lists into a single sorted linked list without using additional space.

    • Create a dummy node to start the merged list

    • Compare the values of the two linked lists and add the smaller value to the merged list

    • Move the pointer of the merged list and the pointer of the smaller value list

    • Continue this process until one of the lists is fully traversed

    • Append the remaining elements of the other list to the me

  • Answered by AI
  • Q2. 

    Sort 0 1 2 Problem Statement

    Given an integer array arr of size 'N' containing only 0s, 1s, and 2s, write an algorithm to sort the array.

    Input:

    The first line contains an integer 'T' representing the n...
  • Ans. 

    Sort an array of 0s, 1s, and 2s in linear time complexity.

    • Use three pointers to keep track of 0s, 1s, and 2s while traversing the array.

    • Swap elements based on the values encountered to sort the array in-place.

    • Time complexity should be O(N) and space complexity should be O(1).

  • Answered by AI
Round 2 - Face to Face 

(3 Questions)

Round duration - 60 Minutes
Round difficulty - Medium

It was more of a in depth round on the framework I'm working on and problem solving.

  • Q1. What is the event loop and what is its significance?
  • Ans. 

    The event loop is a mechanism in programming that allows for asynchronous execution of code.

    • The event loop is a key component in JavaScript's runtime environment, responsible for handling asynchronous operations.

    • It continuously checks the call stack for any pending tasks and executes them in a non-blocking manner.

    • The event loop ensures that the program remains responsive by allowing other code to run while waiting for ...

  • Answered by AI
  • Q2. Can you provide examples of output-based questions in JavaScript that utilize browser APIs?
  • Ans. 

    Output-based questions in JavaScript using browser APIs

    • Example 1: Write a script that uses the Geolocation API to display the user's current location on a map

    • Example 2: Create a program that uses the Web Audio API to play a sound when a button is clicked

    • Example 3: Develop a web page that uses the Canvas API to draw a simple animation

  • Answered by AI
  • Q3. How would you design a system to support localization in a mobile app?
  • Ans. 

    Designing a system to support localization in a mobile app

    • Use resource files to store localized strings for different languages

    • Implement a language selection feature for users to choose their preferred language

    • Utilize localization libraries or frameworks to streamline the process

    • Consider cultural differences when localizing content, such as date formats and currency symbols

  • Answered by AI
Round 3 - Face to Face 

(3 Questions)

Round duration - 75 Minutes
Round difficulty - Hard

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.

  • Q1. You need to find the fastest 3 horses out of a group, given that you can only race 5 horses at a time. How would you approach this problem?
  • Ans. 

    To find the fastest 3 horses out of a group with 5 horses racing at a time, we can use a tournament style approach.

    • Divide the horses into groups of 5 and race them against each other. This will give you the fastest horse in each group.

    • Take the winners from each group and race them against each other. The top 3 horses in this final race will be the fastest 3 overall.

    • Keep track of the results and compare the timings to d

  • Answered by AI
  • Q2. How do you debug the root cause of lag on a screen?
  • Ans. 

    To debug lag on a screen, analyze code, check for memory leaks, optimize rendering, and use profiling tools.

    • Analyze code to identify any inefficient algorithms or operations causing lag.

    • Check for memory leaks that could be impacting performance.

    • Optimize rendering by reducing the number of draw calls, optimizing shaders, and minimizing overdraw.

    • Use profiling tools like Xcode Instruments or Android Profiler to identify p

  • Answered by AI
  • Q3. Can you explain the architecture of the app you have recently worked on?
  • Ans. 

    The app I recently worked on is a social media platform for sharing photos and connecting with friends.

    • The app follows a client-server architecture, with the client being the mobile app and the server handling data storage and processing.

    • The client side is built using React Native for cross-platform compatibility.

    • The server side is implemented using Node.js with a MongoDB database for storing user data and photos.

    • The a...

  • Answered by AI

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - 1 in GurgaonEligibility criteriaNo criteriaCars24 interview preparation:Topics to prepare for the interview - Data Structures Algorithms, Javascript, System DesignTime required to prepare for the interview - 1 MonthInterview preparation tips for other job seekers

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 resume tips for other job seekers

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)

Final outcome of the interviewSelected

Skills evaluated in this interview

CARS24 interview questions for designations

 Senior Software Developer

 (2)

 Software Engineer

 (3)

 Software Engineer2

 (1)

 Salesforce Developer

 (1)

 Senior Developer

 (1)

 Senior Software Engineer

 (5)

 React Native Developer

 (5)

 Front end Developer

 (1)

Interview questions from similar companies

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Campus Placement and was interviewed before Dec 2023. There were 2 interview rounds.

Round 1 - Aptitude Test 

Duration 1Hr
2 coding questions

Round 2 - Technical 

(2 Questions)

  • Q1. Don't remember the questions
  • Q2. Don't remember the questions.

Interview Preparation Tips

Interview preparation tips for other job seekers - easy interview. anyone can crack easily if you are clear with basic concepts.
Interview experience
4
Good
Difficulty level
Easy
Process Duration
Less than 2 weeks
Result
No response

I applied via Naukri.com and was interviewed in Oct 2024. There were 4 interview rounds.

Round 1 - Aptitude Test 

Easy level to Medium level

Round 2 - Coding Test 

2 Easy questions of DSA

Round 3 - One-on-one 

(2 Questions)

  • Q1. One DSA question
  • Q2. Normal discussion about tech stack
Round 4 - HR 

(2 Questions)

  • Q1. Tell about yourself
  • Q2. Why do you want to join digit?

Interview Preparation Tips

Interview preparation tips for other job seekers - Go easy.. Nothing is hard in digit hiring
Interview experience
2
Poor
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Referral and was interviewed in Apr 2024. There were 2 interview rounds.

Round 1 - Technical 

(2 Questions)

  • Q1. Code postorder traversal without using recursion.
  • Ans. 

    Iterative solution using a stack to perform postorder traversal.

    • Use a stack to simulate the recursive call stack.

    • Push nodes in the order of right, left, root.

    • Pop nodes from stack and add to result array.

    • Repeat until stack is empty.

  • Answered by AI
  • Q2. Leetcode Problem 1626 - Best team with no conflicts.
Round 2 - System Design 

(2 Questions)

  • Q1. Design whatsapp with one to one, group messaging and read receipts functionalities. Design the database.
  • Ans. 

    Design a messaging app like WhatsApp with one-to-one, group messaging, and read receipts functionalities.

    • Use a relational database to store user information, messages, and group memberships.

    • Create tables for users, messages, groups, and group memberships.

    • Include columns for message content, sender, receiver, timestamp, and read status.

    • Implement a feature to mark messages as read with read receipts.

    • Use indexes for effic

  • Answered by AI
  • Q2. Questions on dbms, cn and os.

Skills evaluated in this interview

Interview experience
3
Average
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. The question was about Nodejs
  • Q2. The question was to build a linked list in Nodejs
Round 2 - Technical 

(2 Questions)

  • Q1. The first question was related to DSA
  • Q2. The question was related to SQL

I was interviewed in May 2022.

Round 1 - Assignment 

Round duration - 120 minutes
Round difficulty - Medium

Round 2 - Video Call 

(1 Question)

Round duration - 120 minutes
Round difficulty - Medium

- Discussion on the first round's assignment
- Was asked about adding unit tests in the assignment
- Fundamental questions on the approach used for the assignment.

  • Q1. What are some things that could have been done better in the system design problem given in the first round?
  • Ans. 

    Some improvements in the system design problem could include better scalability planning, more efficient data storage solutions, and improved error handling.

    • Implementing a more robust caching mechanism to improve performance under heavy load.

    • Optimizing the database schema for better query performance and scalability.

    • Introducing load balancing and horizontal scaling to handle increased traffic.

    • Enhancing error handling t...

  • Answered by AI
Round 3 - Video Call 

(1 Question)

Round duration - 90 minutes
Round difficulty - Medium

Round was with tech lead. Was briefly asked about the problem I solved in the first round. Then I was asked to solve 1 medium level DSA based question. Some discussion on culture fit was also done.

  • Q1. Given the frequency of traffic lights' states, can you determine if there will ever be an invalid state for the traffic signal, and what are the conditions that lead to an invalid state?
  • Ans. 

    Yes, an invalid state can occur if the traffic lights are in conflicting states simultaneously.

    • An invalid state occurs when multiple traffic lights are showing conflicting signals, such as both red and green at the same time.

    • This can happen due to a malfunction in the traffic light system or human error in programming the lights.

    • For example, if a traffic light is stuck showing both red and green signals, it would be co

  • Answered by AI

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - 1 in GurgaonEligibility criteriaNo criteriaBlinkit interview preparation:Topics to prepare for the interview - Data structures, Algorithms, Web development, OOP, LLDTime required to prepare for the interview - 3 monthsInterview preparation tips for other job seekers

Tip 1 : Have clear web dev fundamentals
Tip 2 : Have at least 1 good non-trivial project
Tip 3 : Practice basic DSA questions.

Application resume tips for other job seekers

Tip 1 : For past experience (internship/full time), explain the impact you created instead of only mentioning what you did.
Tip 2 : Don't exceed 1 page.
Tip 3 : Get it cross-checked for mistakes through multiple sources.
Tip 4 : Only put in stuff that you are confident in being able to explain.

Final outcome of the interviewSelected

Skills evaluated in this interview

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Aptitude Test 

The exam duration is one and a half hours.

Round 2 - Coding Test 

The total exam time is one and a half hours.

Round 3 - Group Discussion 

It encompasses all topics related to full stack development.

Round 4 - Technical 

(2 Questions)

  • Q1. Asks questions on SQL
  • Q2. Asks question in typical topics
Round 5 - HR 

(1 Question)

  • Q1. Where do you see yourself in two years?
  • Ans. 

    In two years, I see myself as a senior software developer leading a team on innovative projects.

    • Advancing to a senior software developer role

    • Leading a team on new and innovative projects

    • Continuing to enhance my technical skills through ongoing learning and training

  • Answered by AI
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CARS24 Interview FAQs

How many rounds are there in CARS24 Software Developer interview?
CARS24 interview process usually has 1-2 rounds. The most common rounds in the CARS24 interview process are Technical, Resume Shortlist and Coding Test.
How to prepare for CARS24 Software Developer interview?
Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at CARS24 . The most common topics and skills that interviewers at CARS24 expect are Angularjs, CSS, HTML, Javascript and React.Js.
What are the top questions asked in CARS24 Software Developer interview?

Some of the top questions asked at the CARS24 Software Developer interview -

  1. Implement a springboot service that intercepts http reques...read more
  2. Implementation of LRU ca...read more
  3. Implementation of Hash...read more

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