Cashfree Payments Senior Sdet Engineer Interview Questions and Answers

Q1. Test cases on search option
Ans. 
Test cases for search option functionality
• Verify search results are displayed correctly

• Test search with different input types (text, numbers, special characters)

• Check search functionality with empty input

• Test search with long input strings

• Verify search results are sorted correctly
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Q2. Coding on string and patterns and Appium framework
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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
Ans. 
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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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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Q1. Simple 3 questions of DSA with brute force to the optimal approach
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Q2. 2 stacks, palindrome tricky, string question (simple)
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Q1. 2 stacks with optinal approach
Ans. 
Implementing 2 stacks with optional approach
• Two stacks can be implemented in a single array by dividing it into two halves

• Optional approach can be implemented by using a third parameter to indicate which stack to use

• Push and pop operations can be performed on both stacks independently
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Q2. Some hr interview question
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Q1. Marital status discussion
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Q2. Future discusssions about what i want nd plans
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Quantitative based questions and 2 easy-medium Coding Questions (Tree & Arrays)

Went through resume and 2 coding questions (medium) (rat in a maze and follow up question) (largest area in a histogram)

One coding question (Sum Tree) and few SQL & DBMS queries.

Q1. Why do you want to join Money view
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Q2. Tell me about your 5 year plan
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Q3. Tell me about yourself and your hobbies
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