Google SSE Interview Questions and Answers

Q1. Advantage and disadvantage of framework.
Ans. 
Frameworks provide structure and pre-built components for software development, but can also limit flexibility and require learning curve.
• Advantage: Provides structure and pre-built components for faster development

• Advantage: Can improve code quality and maintainability

• Disadvantage: Can limit flexibility and customization

• Disadvantage: Requires learning curve and potential dependency issues

• Example: ReactJS provides a fr...read more
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Q1. What is Oops? Advantage and disadvantage
Ans. 
Oops stands for Object-Oriented Programming. It is a programming paradigm that uses objects to represent real-world entities.
• Advantages: code reusability, modularity, encapsulation, inheritance, polymorphism

• Disadvantages: complexity, steep learning curve, performance overhead

• Example: creating a class 'Car' with properties like 'make', 'model', and 'year', and methods like 'start_engine' and 'stop_engine'
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Round duration - 50 minutes
Round difficulty - Easy

This was a Data Structural round.

Q1. 
Distinct Islands Problem Statement
Given a two-dimensional array/list consisting of integers 0s and 1s, where 1 represents land and 0 represents water, determine the number of distinct islands. A group of...read more
Ans. 
Count the number of distinct islands in a 2D array of 0s and 1s.
• Identify islands by performing depth-first search (DFS) on the grid

• Use a set to store the shape of each island and check for duplicates

• Consider translations to determine distinct islands
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Round duration - 50 minutes
Round difficulty - Easy

This was a Data Structural round.

Q1. 
Word Wrap Problem Statement
You are tasked with arranging 'N' words of varying lengths such that each line contains at most 'M' characters, with each word separated by a space. The challenge is to minimiz...read more
Ans. 
The goal is to minimize the total cost of arranging 'N' words on each line with a maximum character limit 'M'.
• Calculate the cost of each line as the cube of extra space characters needed to reach 'M'.

• Minimize the total cost by arranging words to fit within the character limit on each line.

• Ensure each word appears fully on one line without breaking across lines.
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Round duration - 60 minutes
Round difficulty - Easy

This was a System Design round.

Q1. Can you design a system similar to Red Bus that can handle bookings and onboard both vendors and customers to the platform?
Ans. 
Design a system similar to Red Bus for handling bookings and onboarding vendors and customers.
• Implement a user-friendly interface for customers to search and book tickets

• Create a vendor portal for vendors to manage their offerings and availability

• Include payment gateway integration for secure transactions

• Develop a robust backend system for managing bookings, cancellations, and refunds

• Utilize a database to store user in...read more
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Round duration - 50 minutes
Round difficulty - Easy

This was a System Design round

Round duration - 50 minutes
Round difficulty - Easy

This was an HR round.