Paytm Software Testing Engineer Interview Questions and Answers

API chaining is the process of making multiple API calls in a sequence to achieve a desired outcome.

• Identify the APIs that need to be called in sequence

• Extract necessary data from the response of one API call to use in the next call

• Handle errors and exceptions that may occur during the chaining process

• Use tools like Postman, RestAssured, or programming languages like Python to automate the chaining process

Page object for login functionality

• Create a LoginPage class with methods for entering username, password, and clicking login button

• Use locators to identify the username input field, password input field, and login button

• Implement a method to perform the login action and return the next page object

Eslint file extension is .eslintrc.js and rules can be combined using extends property

• Eslint file extension is .eslintrc.js

• Rules can be combined using the 'extends' property in the eslint configuration file

• For example, to combine rules from multiple eslint configurations, you can use: 'extends: ['eslint:recommended', 'plugin:react/recommended']

Program to check if braces are well-formed

• Use a stack to keep track of opening braces

• Iterate through the input string and push opening braces onto the stack

• When a closing brace is encountered, pop from the stack and check if it matches the corresponding opening brace

• If stack is empty at the end and all braces are matched, return true

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

SOLID is a set of five design principles to make software designs more understandable, flexible, and maintainable.

• S - Single Responsibility Principle: A class should have only one reason to change.

• O - Open/Closed Principle: Software entities should be open for extension but closed for modification.

• L - Liskov Substitution Principle: Objects of a superclass should be replaceable with objects of its subclasses without aff...read more

Memory allocation in Java is managed by the JVM using the heap and stack memory areas.

• Java uses the heap memory for storing objects and the stack memory for storing method calls and local variables.

• Memory allocation in Java is automatic and managed by the garbage collector.

• Java provides the 'new' keyword to allocate memory for objects on the heap.

• Primitive data types are stored on the stack, while objects are stored on

Jira is a project management tool. Zephyr and X-Ray are test management tools integrated with Jira.

• Jira is a project management tool used for tracking issues, managing projects, and agile development.

• Zephyr is a test management tool that integrates with Jira for test case management and execution.

• X-Ray is another test management tool that integrates with Jira, offering more advanced test management features like test p

Java program to reverse a string

• Create a char array from the input string

• Use two pointers to swap characters at opposite ends

• Continue swapping until the pointers meet in the middle

Program to find duplicates in a given string and print the count of characters

• Iterate through each character in the string and store the count of each character in a hashmap

• Print the characters with count greater than 1 to find duplicates

• Handle both uppercase and lowercase characters separately if needed

Test cases for mobile recharge feature

• Verify user can successfully recharge their mobile with valid amount

• Verify user receives confirmation message after successful recharge

• Verify user cannot recharge with invalid amount

• Verify user cannot recharge with insufficient balance

• Verify user cannot recharge if network connection is lost