Zepto SDE Interview Questions and Answers

Q1. System design of Cricbuzz
Ans. 
Cricbuzz system design involves handling real-time sports data, user traffic, and providing live scores, news, and updates.
• Use microservices architecture to handle different functionalities like live scores, news, and updates.

• Implement caching mechanisms to reduce load on servers and improve performance.

• Utilize a distributed database to store large amounts of sports data efficiently.

• Implement a robust notification syst...read more
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DSA - 3 Coding Questions

Q1. Machine coding - low level design
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Q1. Write system design for cab booking system
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Q1. DESIGN CALENDER
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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

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...read more
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.
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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,...read more
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.
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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 ...read more
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Round duration - 30 Minutes
Round difficulty - Easy

It is just a formality