Blinkit SDE Interview Questions and Answers

Q1. Write system design for cab booking system
Ans. 
Design a scalable cab booking system for efficient ride management and user experience.
• User Registration: Users can sign up using email or phone number.

• Cab Availability: Real-time tracking of cabs using GPS for efficient allocation.

• Booking Process: Users can book a cab by entering pickup and drop-off locations.

• Payment Integration: Support for multiple payment methods like credit cards, wallets.

• Driver App: A separate in...read more
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There was only two coding questions in 50 minutes interview

Q1. One coding question
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Q2. Only one coding question
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Q3. Medium level coding question
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Coding round has two questions ranging in medium -hard level leetcode questions

Q1. Doubly Linked List
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Q2. Graph - topological sort
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Q3. Operating system, database management system
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Q1. Longest Common Subsequence
Ans. 
Longest Common Subsequence is the longest sequence of characters that appear in the same order in both strings.
• Use dynamic programming to solve this problem efficiently.

• Create a 2D array to store the lengths of longest common subsequences.

• Iterate through the strings to fill the array and find the longest common subsequence.
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Q2. Largest area in histogram
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The largest area in a histogram refers to the rectangle with the maximum area that can be formed within the histogram bars.
• Identify the largest rectangle that can be formed by considering each bar as a potential height and calculating the area based on the width of the rectangle.

• Use a stack data structure to efficiently find the largest area in a histogram by keeping track of the indices of the bars in non-decreasing o...read more
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Leetcode medium question

Q1. Technical coding
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Q2. Java basics questions were asked
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Q3. Basics of Unix and shell scripting
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Q1. DESIGN CALENDER
Ans. 
Design a calendar system that manages events, reminders, and scheduling for users efficiently.
• Define user requirements: Understand what features users need, such as event creation, reminders, and recurring events.

• Choose data structures: Use arrays or linked lists for storing events, and hash maps for quick access to dates.

• Implement user interface: Design a simple UI for users to view, add, and edit events easily.

• Consid...read more
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Q2. DESIGN FACEBOOK
Ans. 
Design a social networking platform with features like user profiles, news feed, messaging, and photo sharing.
• Create user profiles with customizable information and privacy settings

• Implement a news feed algorithm to display relevant content to users

• Include messaging functionality for private communication between users

• Allow users to share photos and videos on their profiles and in posts
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Q3. LLD ROUND ON BOTH THIS QUESTIONS
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Q1. WHY DO YOU WANT TO JOIN
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Q2. ARE YOU FREE FOR THIS ROLE
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It had 9 uqestions , one problem solving , one SQL , one API and 6 mcq

Easy assignment , if you hav eOOps knowledge you can do it