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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

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 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 appeared for an interview 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)

 Senior Developer

 (1)

 Salesforce Developer

 (1)

 Senior Software Engineer

 (6)

 React Native Developer

 (5)

 Senior Java Developer

 (1)

Interview questions from similar companies

I appeared for an interview before Sep 2020.

Round 1 - Face to Face 

(2 Questions)

Round duration - 60 Minutes
Round difficulty - Easy

  • Q1. 

    0/1 Knapsack Problem Statement

    A thief is planning to rob a store and can carry a maximum weight of 'W' in his knapsack. The store contains 'N' items where the ith item has a weight of 'wi' and a value of...

  • Ans. 

    Yes, the 0/1 Knapsack problem can be solved using dynamic programming with a space complexity of not more than O(W).

    • Use a 1D array to store the maximum value that can be stolen for each weight capacity from 0 to W.

    • Iterate through each item and update the array based on whether including the item would increase the total value.

    • The final value in the array at index W will be the maximum value that can be stolen.

  • Answered by AI
  • Q2. 

    Find the Second Largest Element

    Given an array or list of integers 'ARR', identify the second largest element in 'ARR'.

    If a second largest element does not exist, return -1.

    Example:

    Input:
    ARR = [2,...
  • Ans. 

    Find the second largest element in an array of integers.

    • Iterate through the array to find the largest and second largest elements.

    • Handle cases where all elements are identical.

    • Return -1 if a second largest element does not exist.

  • Answered by AI
Round 2 - Video Call 

(1 Question)

Round duration - 60 Minutes
Round difficulty - Easy

System Design Round

  • Q1. Design a system for Twitter, discussing its architecture, key components, and scalability considerations.
  • Ans. 

    Design a scalable system for Twitter with key components and architecture.

    • Use microservices architecture for scalability and fault isolation.

    • Key components include user service, tweet service, timeline service, and notification service.

    • Use a distributed database like Cassandra for storing tweets and user data.

    • Implement a message queue like Kafka for handling real-time updates and notifications.

    • Use a caching layer like ...

  • Answered by AI
Round 3 - HR 

Round duration - 30 Minutes
Round difficulty - Easy

It is just a formality

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - 1 in BangaloreEligibility criteriaResume shortlistingSwiggy interview preparation:Topics to prepare for the interview - OOPS, Data Structures, Core Java, Algorithms, DBMS, SQL,Time required to prepare for the interview - 3 monthsInterview preparation tips for other job seekers

Tip 1 : System Design
Tip 2 : Practice questions from leetcode
Tip 3 : Have some projects.

Application resume tips for other job seekers

Tip 1 : Mention what you know 
Tip 2 : Good previous work to showcase

Final outcome of the interviewSelected

Skills evaluated in this interview

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

Majorily on SQL and Databases

Round 2 - Technical 

(2 Questions)

  • Q1. Align two images in a page with same width and same height
  • Ans. 

    Use CSS to align two images with same width and height on a page

    • Set both images to have the same width and height using CSS

    • Use flexbox or grid layout to align the images horizontally or vertically

    • Adjust margins or padding to fine-tune the alignment

  • Answered by AI
  • Q2. Array related question
Round 3 - HR 

(2 Questions)

  • Q1. Situation based question
  • Q2. Majorily focused on project

Skills evaluated in this interview

Interview experience
4
Good
Difficulty level
Easy
Process Duration
Less than 2 weeks
Result
Selected Selected

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

Round 1 - Coding Test 

Basic coding only not to worry much

Round 2 - One-on-one 

(2 Questions)

  • Q1. Tell me about ur self
  • Ans. 

    I am a passionate software developer with experience in Java, Python, and web development.

    • Experienced in Java, Python, and web development technologies

    • Strong problem-solving skills

    • Excellent team player with good communication skills

  • Answered by AI
  • Q2. What is ur projects
  • Ans. 

    I have worked on various projects including a web-based inventory management system and a mobile app for tracking fitness goals.

    • Developed a web-based inventory management system using React and Node.js

    • Created a mobile app for tracking fitness goals using Flutter

    • Implemented RESTful APIs for communication between frontend and backend systems

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - all the best do well!
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
Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Referral and was interviewed before Sep 2022. There were 3 interview rounds.

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 tips
Round 2 - Technical 

(1 Question)

  • Q1. React JS, coding round, DSA, poly phill, map , shallow copy deep copy, popular JS DSA questions
Round 3 - Assignment 

Basic React JS clock/ stopwatch

Interview Preparation Tips

Interview preparation tips for other job seekers - know how to create componenets, and Easy to early medium level DSA leetcode JS based.
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Campus Placement and was interviewed in Apr 2023. There were 3 interview rounds.

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 tips
Round 2 - Coding Test 

2 coding question one on maximum sum problem and other on tree traversal

Round 3 - Technical 

(1 Question)

  • Q1. Dbms oops dsa questions are there and one coding question which you have to pseudo code it and dry run it

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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CARS24 Software Developer Interview Process

based on 3 interviews

Interview experience

3
  
Average
View more
CARS24 Software Developer Salary
based on 30 salaries
₹13 L/yr - ₹27.5 L/yr
113% more than the average Software Developer Salary in India
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based on 6 reviews

4.1/5

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4.3

Skill development

4.5

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4.5

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4.3

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4.5

Company culture

4.6

Promotions

4.5

Work satisfaction

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