PayU Payments Sdet Interview Questions and Answers

Q1. Array question from leetcode
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Q2. Stack question from leetcode
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Two problems each of array and stack

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
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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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Q1. Explain testing framework used in project
Ans. 
The testing framework used in the project is Selenium with TestNG for automated testing.
• Selenium is used for automating web applications testing

• TestNG is used for organizing test cases and generating reports

• Framework allows for easy maintenance and scalability

• Integration with CI/CD tools like Jenkins for continuous testing
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Asked program for reverse string

Q1. Multithreading code
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An aptitude test consisting of payments knowldge and testing knowledge was taken . The exam was well structured and results were shared in a proper format

Q1. What is defect life cycle?
Ans. 
Defect life cycle is the process of identifying, reporting, fixing, and verifying defects in software development.
• Defect is identified by testers during testing

• Defect is reported to the development team

• Development team fixes the defect

• Fixed defect is verified by testers

• Defect is closed if it passes verification

• If defect fails verification, it is reopened and the cycle continues
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Q2. What ECP & BVA?
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ECP stands for Equivalence Class Partitioning and BVA stands for Boundary Value Analysis.
• ECP is a testing technique that divides input data into groups that are expected to exhibit similar behavior.

• BVA is a testing technique that focuses on testing values at the boundaries of input domains.

• ECP and BVA are used to identify defects in software and improve the quality of testing.

• For example, if a program accepts input val...read more
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Q1. Test scenarios for ATM
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Test scenarios for ATM
• Verify if the ATM is dispensing the correct amount of cash

• Check if the ATM is accepting valid cards and rejecting invalid ones

• Test if the ATM is able to handle multiple transactions at the same time

• Ensure that the ATM is providing proper instructions to the user

• Validate if the ATM is able to handle network connectivity issues
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Basic MCQ questions which were easy

Q1. Basic python coding
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Q1. Regex related coding (mainly to access the mode of thinking)
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