Paytm Insider Senior QA Engineer Interview Questions and Answers

Round duration - 60 minutes
Round difficulty - Easy

This was a written test with 2 coding problems.

Q1. 
Combination Sum Problem Statement
Given an array of distinct positive integers ARR and a non-negative integer 'B', find all unique combinations in the array where the sum is equal to 'B'. Numbers can be c...read more
Ans. 
The task is to find all unique combinations in an array where the sum is equal to a given target sum, with elements in non-decreasing order.
• Use backtracking to generate all possible combinations.

• Sort the array to ensure elements are in non-decreasing order.

• Keep track of the current combination and sum while exploring the array.

• Recursively explore all possible combinations.

• Return the valid combinations that sum up to th
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Q2. 
Next Greater Number Problem Statement
Given a string S which represents a number, determine the smallest number strictly greater than the original number composed of the same digits. Each digit's frequenc...read more
Ans. 
The task is to find the smallest number greater than the given number with the same set of digits.
• Iterate from right to left to find the first digit that can be swapped with a larger digit to make the number greater.

• Swap this digit with the smallest digit to its right that is larger than it.

• Sort all digits to the right of the swapped digit in ascending order to get the smallest number.

• If no such number exists, return -
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Q1. Basics on Automation
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2 programming question moderate level

Q1. Java Questions/ Selenium Question/ SQL
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Q1. Managerial Round. Puzzle/ Basic program
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Q1. Salary Discussion, basic HR questions
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Q1. Api status codes, api debugging questions
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Q2. If you get 500 error how to debug.
Ans. 
To debug a 500 error, check server logs, review code changes, test API endpoints, and use debugging tools.
• Check server logs for error details

• Review recent code changes that may have caused the error

• Test API endpoints using tools like Postman

• Use debugging tools like Chrome DevTools or Firebug
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Q3. One java string question merge two strings diagonally.
Ans. 
Merge two strings diagonally in a Java array of strings.
• Iterate through each row and column to merge characters diagonally

• Keep track of the diagonal position to insert characters from both strings

• Handle cases where strings have different lengths

• Example: String 1: 'hello', String 2: 'world', Merged: 'hweolrllod'

• Example: String 1: 'abc', String 2: '123', Merged: 'a1b2c3'
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Q1. Method overload, Method Over ride, Inheritance, POM model explanation, Run only failed test cases in TESTNG how to achieve this, How to determine the tool for project, Write the X-path for random web e...read more
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Q1. Java code to find a substring
Ans. 
Java code to find a substring in an array of strings
• Use the contains() method to check if a string contains the substring

• Iterate through the array of strings and check each string for the substring

• Use the indexOf() method to find the index of the substring within the string
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Q2. Write getter setter for the given scenario
Ans. 
Write getter setter for a scenario in a Senior QA Engineer interview
• Create private variables for the data you want to get and set

• Create public getter methods to access the private variables

• Create public setter methods to modify the private variables
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Q1. Selenium framework level questions
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Q2. ETL questions & Data warehouse concepts
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Q3. Functional/ manual testing related questions
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Q1. Few technical questions & generic questions
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Q2. CTC & Experience & expected CTC & Notice period, etc
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Q1. Regression testing
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Q2. Defect life cycle
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