KhataBook SDE-2 Interview Questions and Answers

Dsa - medium leetcode will suffice

Dosa - medium leetcode will suffice

Q1. Db design questions - Swiggy like system design?
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Q2. Past experience on projects
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Q3. Answered suitably about past projects/ GitHub projects
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Q1. Find the missing number in an array, , given the array conatins numbers form 1 to n and one number is missing
Ans. 
Find the missing number in an array containing numbers from 1 to n.
• Iterate through the array and calculate the sum of all numbers from 1 to n.

• Calculate the sum of all numbers in the given array.

• Subtract the sum of array from the sum of all numbers to find the missing number.
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Q2. And question on resume
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Data structure and algo questions from leetcode

Machine coding assignment

Q1. Design Content Delivery Network
Ans. 
Designing a Content Delivery Network (CDN) for efficient content distribution.
• Identify target audience and content types

• Select appropriate CDN providers based on needs (e.g. Akamai, Cloudflare)

• Implement caching strategies for static and dynamic content

• Optimize network routing for faster delivery

• Monitor performance and adjust as needed
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Q2. Design notification service
Ans. 
Design a notification service for sending alerts to users.
• Identify types of notifications (email, SMS, push notifications)

• Implement a notification queue to handle high volume of notifications

• Allow users to customize notification preferences

• Include monitoring and logging for tracking delivery status

• Consider scalability and reliability of the service
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Regex generator- used dp

Q1. Merge two sorted arrays
Ans. 
Merging two sorted arrays into a single sorted array
• Create a new array to store the merged result

• Iterate through both arrays simultaneously, comparing elements and adding the smaller one to the result array

• Handle cases where one array is longer than the other by appending the remaining elements
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Q2. Put patch and post in api testing
Ans. 
Patch and post are HTTP methods used in API testing to update and create resources, respectively.
• PATCH method is used to update an existing resource in the API

• POST method is used to create a new resource in the API

• Both methods are commonly used in RESTful APIs for CRUD operations

• Example: PATCH /api/users/123 to update user with ID 123

• Example: POST /api/users to create a new user
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Q3. Explain your automation framework
Ans. 
My automation framework is a data-driven framework using Selenium WebDriver and TestNG for test execution and reporting.
• Uses Selenium WebDriver for interacting with web elements

• Utilizes TestNG for test execution and reporting

• Follows a data-driven approach for test data management
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Merge 2 unsorted array

Selenium automation framework
Redt assured automation framework

Asked spiral matrix question and some map related questions and optimise the approach

Q1. Asked to automate ui of the provided screen and backed framework of api testing Asked about the project and related questions
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Q1. Asked about payment gateway related questions and how to deal with it
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2 DSA questions one based on Bit manipulation and other one DP.

Q1. Was asked DBMS questions including 2 DSA questiosn one was sliding window LC Medium and other was easy array based questions
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