100+ Automation Tester Interview Questions and Answers

Playwright is a Node.js library for browser automation that allows you to write reliable and maintainable tests.

• Playwright supports multiple browsers such as Chrome, Firefox, and WebKit.

• It provides a single API to automate web applications across different browsers.

• Playwright has built-in support for headless mode, network interception, and device emulation.

• It allows you to take screenshots, record videos, and trace network activity during test execution.

Arraylist vs linked list, interface vs abstract, locators

• ArrayList and LinkedList are both used to store collections of data, but ArrayList is faster for accessing elements while LinkedList is faster for adding or removing elements.

• Interfaces are used to define a contract for a class to implement, while abstract classes can provide some implementation and cannot be instantiated.

• Locators are used in test automation to identify web elements on a page, such as ID, name, class, o...read more

Schedule a Jenkins job to run at 6 AM every Saturday and Sunday using cron syntax.

• Use the Jenkins job configuration interface to set the schedule.

• In the 'Build Triggers' section, select 'Build periodically'.

• Enter the cron syntax: '0 6 * * 6,7' for 6 AM on Saturday and Sunday.

• The syntax breakdown: '0' (minute), '6' (hour), '*' (day of month), '*' (month), '6,7' (day of week).

• Ensure the Jenkins server timezone matches your desired schedule.

Count the occurrences of consecutive characters in a given string.

• Iterate through the string and compare each character with the next one

• Keep track of the count when consecutive characters are found

• Store the consecutive characters and their counts in an array of strings

An Automation Framework architecture outlines the structure and components for automated testing processes.

• 1. Test Automation Strategy: Define the approach, e.g., keyword-driven, data-driven, or behavior-driven.

• 2. Framework Components: Include test scripts, test data, libraries, and reporting tools.

• 3. Layered Architecture: Separate layers for test scripts, business logic, and utilities for better maintainability.

• 4. Integration: Ensure compatibility with CI/CD tools like Jenki...read more

Program to find the highest number in an array of strings.

• Convert each string element in the array to an integer

• Iterate through the array to find the highest number

• Return the highest number found

Taking a screenshot in Selenium can be done using the getScreenshotAs method.

• Use WebDriver's getScreenshotAs method to capture the screenshot

• Save the screenshot to a file using File class

• Handle exceptions using try-catch block

Config file in Playwright is used to store settings and configurations for the automation tests.

• Config file is typically a JSON or JavaScript file where you can define settings such as browser type, launch options, timeouts, etc.

• It helps in centralizing and managing configurations for multiple tests.

• Example: playwright.config.js file in Playwright project.

Dynamic table elements can be handled by locating the table, identifying the rows and columns, and using appropriate methods to interact with the data.

• Locate the table element using a unique identifier such as class, id, or xpath

• Identify the rows and columns within the table using HTML tags like and

• Use methods like getText() or getAttribute() to retrieve data from the table cells

• Handle dynamic changes in the table by using dynamic xpath or waiting for specific elements to lo...read more

The def keyword is used in Selenium to define a function or method.

• Used to define reusable code blocks

• Helps in organizing code and improving readability

• Allows for easier maintenance and updates

• Example: def login(username, password) { //code to login }

Handling OAuth in automation involves managing tokens and authentication flows for secure API access during testing.

• Token Acquisition: Use OAuth flows (e.g., Authorization Code, Client Credentials) to obtain access tokens programmatically.

• Token Storage: Store tokens securely in environment variables or configuration files to reuse them across tests.

• API Requests: Include the access token in the Authorization header of API requests, e.g., 'Authorization: Bearer <token>'.

• Token R...read more

Selenium architecture consists of multiple components that facilitate automated testing of web applications across different browsers.

• Selenium WebDriver: This is the core component that interacts directly with the web browser, allowing for the execution of test scripts.

• Selenium Grid: Enables parallel execution of tests across multiple machines and browsers, improving test efficiency and speed.

• Selenium IDE: A record-and-playback tool for creating tests without programming know...read more

Dependent methods are used to execute test cases in a specific order to avoid failures.

• Dependent methods ensure that the test cases are executed in a specific order.

• They help in avoiding failures due to dependencies between test cases.

• If a test case is dependent on the output of another test case, dependent methods ensure that the first test case is executed before the second.

• They are useful in automated testing where multiple test cases need to be executed in a specific orde...read more

Java program to reverse a string

• Create a char array from the input string

• Use two pointers to swap characters from start and end of the array

• Convert the char array back to a string and return

Code snippet to open a link using WebDriver

• Instantiate a WebDriver object

• Use the get() method to open the desired URL

An automation framework integrates testing tools with CI/CD for efficient software delivery.

• Framework Types: Common frameworks include TestNG, JUnit, and Cucumber for Java-based projects.

• CI/CD Tools: Jenkins, GitLab CI, and CircleCI are popular for automating build and deployment processes.

• Integration Example: A Jenkins pipeline can trigger automated tests after each code commit to ensure quality.

• Reporting: Tools like Allure or ExtentReports can be integrated for detailed tes...read more

Black box testing focuses on functionality without knowledge of internal code, while white box testing examines internal code structure.

• Black box testing tests the functionality of a system without knowledge of its internal code

• White box testing tests the internal code structure and logic of a system

• Black box testing is more focused on end-user perspective

• White box testing is more focused on developer perspective

• Example: Testing a website's login functionality without knowing...read more

Hard assert stops the execution of the test case if it fails, while soft assert continues the execution and logs the failure.

• Hard assert is used when the failure of a particular step makes the further steps irrelevant.

• Soft assert is used when you want to continue with the test case execution even if some steps fail.

• Hard assert is implemented using 'assert' keyword in testing frameworks like TestNG or JUnit.

• Soft assert is implemented using libraries like AssertJ or TestNG's So...read more

Java code to identify duplicates in a given string

• Convert the string into an array of characters

• Use a HashMap to store each character and its frequency

• Iterate through the array and check if the character already exists in the HashMap

• If it does, increment the frequency count, if not, add it to the HashMap

• Finally, iterate through the HashMap and print out the characters with frequency greater than 1

To run a runner class, you can use a test runner tool like JUnit or TestNG in your automation testing framework.

• Use a test runner tool like JUnit or TestNG to execute the runner class

• Add the @RunWith annotation in JUnit or specify the runner class in TestNG XML file

• Make sure the runner class includes the necessary setup and teardown methods for test execution

In four years, I envision myself as a lead automation tester, driving innovative testing strategies and mentoring junior testers.

• Leading a team of automation testers to enhance testing efficiency.

• Implementing advanced testing frameworks and tools, such as Selenium and Cucumber.

• Contributing to the development of best practices in test automation.

• Mentoring and training junior testers to build a strong testing team.

• Collaborating with cross-functional teams to ensure quality in t...read more

Reverse the word 'I love automation' using Java

• Create a StringBuilder object and pass the word to be reversed as a parameter

• Use the reverse() method of the StringBuilder class to reverse the word

• Convert the reversed word back to a string using the toString() method

Automation testing is the process of using tools and scripts to execute test cases and compare actual outcomes with expected outcomes.

• Automation testing helps in reducing manual effort and time required for testing.

• It ensures faster feedback on the quality of the software being tested.

• Automation testing can be used for regression testing, load testing, and performance testing.

• Popular automation testing tools include Selenium, Appium, and JUnit.

Functional testing is a type of software testing where the system is tested against the functional requirements/specifications.

• It focuses on verifying that the software functions as expected and meets the specified requirements.

• It involves testing the user interface, APIs, databases, and other components to ensure they work correctly.

• Examples include testing login functionality, data validation, and system integration.

• Functional testing can be manual or automated, depending o...read more

To download a PDF file, you can use a web browser or a command line tool like wget or curl.

• Use a web browser to navigate to the webpage containing the PDF file link

• Right-click on the link to the PDF file and select 'Save link as' or 'Download linked file'

• Alternatively, you can use command line tools like wget or curl to download the PDF file

Regression testing is testing the entire application after a change, while re-testing is testing a specific part after a bug fix.

• Regression testing involves testing the entire application to ensure that new changes have not affected existing functionality.

• Re-testing involves testing a specific part of the application that was previously found to have a bug, after the bug has been fixed.

• Regression testing is done to ensure that new changes do not introduce new bugs, while re-t...read more

Program to reverse a string using array of characters

• Create an array of characters from the input string

• Iterate through the array in reverse order and append each character to a new string

• Return the reversed string