CARS24 Software Development Engineer II Interview Questions and Answers

Q1. MVVM, Android Related
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Q2. Diffrence between mvvm/ mvc
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MVVM focuses on separation of concerns between UI, business logic, and data layers, while MVC separates application into model, view, and controller.
• MVVM stands for Model-View-ViewModel, where ViewModel acts as a mediator between View and Model.

• MVVM is commonly used in WPF and Xamarin applications.

• MVC stands for Model-View-Controller, where Controller handles user input, Model manages data, and View displays informatio...read more
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2 Medium level DSA questions

Q1. Find the row with maximum number of 1's
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Find the row with maximum number of 1's in a matrix
• Iterate through each row of the matrix

• Count the number of 1's in each row

• Track the row with maximum number of 1's
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Q2. Design Book My Show
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General coding questions

Machine coding round have to develop some working project

Q1. Where do you see after 5 years
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Q2. Challenges in past roles
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2 coding questions in 90 minutes

Q1. LLD of snake and ladder game
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Q1. Resume based questions
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Haxckerrank Test with 3 problems

Q1. DSA and problem solving round
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Q1. LLD and machine coding round
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Q1. Hiring manager connect and team fit
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Q1. The questions were on problem solving using array, matrices and string
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Q1. The second round was on javascript basics and fundamentals like closure,hoisting, promises, event loop.
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Q1. Why are you looking for a change?
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Q2. What are your strengths and weaknesses?
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Q3. Tell me about yourself.
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Q1. 2 online Leetcode Medium questions.
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Q2. Graph BFS and DFS
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Q1. Low level design discussion
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Q2. Design a recommendation engine.
Ans. 
Design a recommendation engine for personalized suggestions based on user preferences and behavior.
• Collect user data such as browsing history, purchase history, ratings, and interactions.

• Use collaborative filtering, content-based filtering, or hybrid approaches to generate recommendations.

• Implement algorithms like matrix factorization, k-nearest neighbors, or neural networks for personalized suggestions.

• Regularly updat...read more
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Q1. High level design discussion
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Q2. Design a load balancer
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Design a load balancer to evenly distribute incoming network traffic across multiple servers.
• Implement a round-robin algorithm to distribute requests evenly among servers.

• Monitor server health and adjust traffic distribution accordingly.

• Use a combination of hardware and software load balancers for optimal performance.

• Consider factors like server capacity, latency, and geographic location when routing traffic.

• Implement ...read more
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Q1. Culture fit and salary negotiations
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Q2. Why do you want to join licious.
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Q1. 1. Given an array find a subset that sums to a given sum K 2. Given an array with duplicate elements, print all triplets that sum to K. Each element at any index i can only be used once.
Ans. 
Given an array, find a subset that sums to a given sum K and print all triplets that sum to K.
• Use a recursive approach to find subsets that sum to K

• Use a nested loop to find triplets that sum to K

• Avoid using duplicate elements in triplets
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Q1. LLD round 1. Design Book My Show. Interviewer was interested in classes and most common api. He asked more about how will these classes when translated into RDBMS table, will look like. What all index I co...read more
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Q1. HLD round 1. Design swiggy 2. Follow up question was to create a state diagram for order object.
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Q1. With HM 1. Projects 2. Major challenges during those projects 3. Who all were you stake holders 4. How do you contribute in design discussion 5. How to you plan your testing with QA and other involved team...read more
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Q1. With VP of engineering 1. Project discussion. In each scope he asked what if this would fail then how are you handling your code. for eg. Let's say you are reading a file and dumping data in batches in 1 t...read more
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