Cashfree Payments Sde1 Interview Questions and Answers

Q1. LinkedList / Tree
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Q2. DP - Recursion - PnC
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Q1. Projects , Last Exp
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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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Build a typeahead component

Q1. Build a form for personal details
Ans. 
Build a form for personal details
• Include fields for name, email, phone number, address, date of birth

• Use input fields, dropdowns, and date pickers for user input

• Add validation for required fields and correct formats

• Consider user experience with clear labels and easy navigation
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Q2. Add validations to different fields
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Implement validations for different fields in software development.
• Identify the fields that require validation such as email, password, phone number, etc.

• Use regular expressions to validate input data format.

• Implement client-side and server-side validations to ensure data integrity.

• Display error messages for invalid input to guide users on correct data entry.
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Q1. LLD/Machine coding - Design a social media application with users, posts, comments, likes, etc. There is also an admin who needs to approve post creation and can delete any post they want. Create appropria...read more
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Q1. High-level design - Design a chat-based application like WhatsApp with only user-to-user chat feature (no group chats). Explain and draw out the E2E design by mentioning all the components and design decis...read more
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Q1. Hiring Manager - basic questions like why Razorpay, what are your career goals, what does career growth look like for you, etc.
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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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Q1. Leetcode medium question using heap
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Q2. MySQL Queries using joins, group by, aggregate functions
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Q1. Leetcode medium question of string
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Q2. Database design for the notification service
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Design a database schema for a notification service
• Identify the entities involved such as users, notifications, and devices

• Create tables for each entity with relevant attributes

• Establish relationships between tables using foreign keys

• Consider indexing for efficient retrieval of notifications

• Implement a mechanism for tracking read/unread status of notifications
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Q1. Describe projects
Ans. 
I have worked on various projects including developing web applications, creating mobile apps, and implementing machine learning algorithms.
• Developed a web application for a retail company to manage inventory and sales data

• Created a mobile app for a fitness tracking platform to track user's exercise routines

• Implemented machine learning algorithms for a recommendation system in an e-commerce website
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Q2. Knowledge testing on ML frameworks
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Had a overall personality, technical & problem solving test with AVP

Q1. One leetcode easy-medium problem
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Q2. Java, springboot and oops question
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Q1. Project related questions
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Q2. System design questions
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