700+ Automation Test Engineer Interview Questions and Answers

Code to reverse a sentence using array of strings.

• Split the sentence into an array of words

• Reverse the array

• Join the array back into a sentence

Selenium is a popular automation testing tool used for web applications. It has various methods and commands for testing.

• Selenium WebDriver is used for automating web applications

• findElement() method is used to locate an element on the web page

• sendKeys() method is used to enter text into a text field

• click() method is used to click on an element

• getTitle() method is used to get the title of the web page

• getText() method is used to get the text of an element

• getAttribute() method ...read more

I have worked on a hybrid automation framework that combines data-driven and keyword-driven approaches.

• The framework uses Excel sheets to store test data and keywords

• It uses Selenium WebDriver for web automation and Appium for mobile automation

• It has a modular structure with reusable functions and libraries

• It generates detailed HTML reports with screenshots and logs

• It supports parallel execution using TestNG

• Example: I used this framework to automate regression tests for a web...read more

To create a left star pattern in Java, use nested loops to print stars in a left-aligned triangle shape. To run parallel test cases in automation testing, use TestNG's parallel attribute in the testng.xml file. TestNG annotations include @Test, @BeforeSuite, @AfterSuite, @BeforeTest, @AfterTest, @BeforeClass, @AfterClass, @BeforeMethod, @AfterMethod.

• For left star pattern in Java, use nested loops to print stars in a left-aligned triangle shape.

• To run parallel test cases in au...read more

TestNG is a testing framework for Java while Cucumber is a BDD tool for behavior-driven development.

• TestNG is used for unit, functional, and integration testing

• Cucumber is used for acceptance testing and supports BDD

• TestNG uses annotations to define test methods and groups

• Cucumber uses Gherkin syntax to define scenarios and steps

• TestNG generates HTML reports while Cucumber generates reports in various formats

• TestNG supports parallel testing while Cucumber does not

• TestNG can b...read more

Explaining the difference between findElement and findElements and defining interface.

• findElement returns the first matching element on the page while findElements returns a list of all matching elements.

• Both methods are used to locate web elements on a page using locators such as ID, class name, name, etc.

• An interface is a collection of abstract methods that can be implemented by a class. It defines a contract that the implementing class must follow.

• In Java, interfaces are u...read more

Git commands used and handling merge conflicts

• Git commands used: git clone, git pull, git push, git add, git commit, git merge, git rebase

• To handle merge conflict: git status to see conflicted files, git diff to see the differences, manually resolve conflicts in the files, git add the resolved files, git commit the changes

Code for switching between browser's tab

• Use driver.switchTo().window() method to switch between tabs

• Pass the window handle of the tab to be switched to as argument

• Get the window handles of all tabs using driver.getWindowHandles() method

• Example: String currentTab = driver.getWindowHandle(); driver.switchTo().window(currentTab);

• Example: Set allTabs = driver.getWindowHandles(); driver.switchTo().window(allTabs.toArray()[1]);

BDD is a software development process that encourages collaboration between developers, QA, and non-technical stakeholders.

• BDD stands for Behavior-Driven Development

• It focuses on defining the behavior of the system through examples in plain text

• Uses a common language (Gherkin syntax) to describe requirements and tests

• Helps in improving communication and understanding between team members

• Popular BDD tools include Cucumber, SpecFlow, and Behave

HashMap allows null values and keys, while HashTable does not. HashMap is not synchronized, making it faster in performance compared to HashTable.

• HashMap allows null values and keys, while HashTable does not.

• HashMap is not synchronized, making it faster in performance compared to HashTable.

• HashMap is preferred for non-thread-safe applications, while HashTable is preferred for thread-safe applications.

Selenium WebDriver is a tool used for automating web application testing. It provides a programming interface to interact with web elements.

• Selenium WebDriver is an open-source tool used for automating web application testing

• It provides a programming interface to interact with web elements

• It supports multiple programming languages such as Java, Python, C#, etc.

• It can automate testing on various browsers such as Chrome, Firefox, Safari, etc.

• It can interact with different types...read more

Java provides various classes for file handling, allowing reading and writing operations using streams.

• Use FileWriter for writing text files: FileWriter writer = new FileWriter('file.txt');

• Use BufferedWriter for efficient writing: BufferedWriter bufferedWriter = new BufferedWriter(writer);

• Always close the writer using bufferedWriter.close() to free resources.

• Handle exceptions using try-catch blocks to manage IOExceptions.

TestNG annotations are used to define test methods, configuration, and execution order in Java testing frameworks.

• @BeforeSuite: Runs before all tests in the suite.

• @BeforeTest: Runs before any test method in the test tag.

• @BeforeClass: Runs before the first method of the class.

• @BeforeMethod: Runs before each test method.

• @Test: Marks a method as a test case.

• @AfterMethod: Runs after each test method.

• @AfterClass: Runs after all methods in the class.

• @AfterTest: Runs after all test ...read more

Database commands can be categorized into DDL, DML, and DCL. DDL commands are used to create, modify, and delete database objects.

• DDL commands include CREATE, ALTER, and DROP.

• DML commands are used to manipulate data in the database. Examples include INSERT, UPDATE, and DELETE.

• DCL commands are used to control access to the database. Examples include GRANT and REVOKE.

• DDL commands are used to create tables, views, indexes, and other database objects.

• DML commands are used to inse...read more

Static and final are keywords in Java. StringBuffer is synchronized while StringBuilder is not. The pattern can be displayed using loops.

• Static keyword is used to create class-level variables or methods. Final keyword is used to make a variable constant.

• StringBuffer is synchronized and thread-safe, while StringBuilder is not synchronized and faster.

• Pattern program can be implemented using nested loops to print the desired pattern.

Method overloading is when multiple methods have the same name but different parameters. Method overriding is when a subclass provides a different implementation of a method from its superclass.

• Method overloading is achieved by having multiple methods with the same name but different parameters.

• Method overriding is achieved by having a subclass provide a different implementation of a method from its superclass.

• Method overloading is determined at compile-time based on the numb...read more

Selenium can handle signages by locating elements using XPath or CSS selectors and interacting with them.

• Locate the signages using unique identifiers like class, id, or text

• Use Selenium's findElement() method to locate the element

• Interact with the element using click(), sendKeys(), getText() methods

• Use explicit waits to ensure the element is visible and clickable

Keyword driven, Data driven and Hybrid are automation frameworks used in software testing.

• Keyword driven framework uses keywords to represent actions and data to be used in testing

• Data driven framework uses external data sources to drive the test cases

• Hybrid framework combines both keyword and data driven approaches

• Keyword driven is best suited for applications with complex user interfaces

• Data driven is best suited for applications with large amounts of data

• Hybrid is best sui...read more

Test data privacy and security is ensured by using anonymized data, encryption, access controls, and secure storage.

• Anonymize sensitive data by replacing real values with fake ones

• Encrypt test data during transmission and storage

• Implement access controls to restrict who can view or modify test data

• Store test data securely using encryption and regular backups

Emerging trends in automation testing include AI and machine learning, shift-left testing, and continuous testing.

• AI and machine learning are being used to improve test automation by predicting test cases, identifying patterns, and optimizing test execution.

• Shift-left testing involves testing early in the development cycle to catch defects sooner and reduce costs.

• Continuous testing integrates automated tests throughout the software delivery pipeline to provide immediate feedb...read more

Test hooks are methods or functions that allow testers to access internal code for testing purposes.

• Test hooks are used to inject test code into the application being tested.

• They can be used to monitor and manipulate the behavior of the application during testing.

• Test hooks can be implemented using tools like Selenium or TestNG.

• They impact automation test execution by providing access to internal components for testing.

Explanation of final key, static, finally, finalized, garbage collection.

• Final key - used to declare a constant value that cannot be changed

• Static - used to declare a variable or method that belongs to the class rather than an instance of the class

• Finally - used to define a block of code that will be executed regardless of whether an exception is thrown or not

• Finalized - a method that is called by the garbage collector before an object is destroyed

• Garbage collection - automat...read more

Sample codes for automation using Selenium WebDriver, Maven, Git, Jenkins

• Selenium WebDriver: driver.findElement(By.id("elementID")).sendKeys("text")

• Maven: mvn clean install

• Git: git clone https://github.com/username/repository.git

• Jenkins: create a new job and configure it to run the automation tests

A sprint is a time-boxed period in Agile methodology during which a team completes a set amount of work.

• Sprints usually last 1-4 weeks

• At the beginning of each sprint, the team plans the work they will complete

• The team works on the planned work during the sprint

• At the end of the sprint, the team demonstrates the completed work to stakeholders

• The team then reflects on the sprint and plans for the next one

Automate scenario to search for 'Mobile' on Amazon, retrieve name and price of results, store in custom class, and display on console.

• Use Selenium WebDriver to launch Amazon website

• Locate search box element and enter 'Mobile' text

• Retrieve name and price of search results using appropriate locators

• Store name and price in custom class with attributes 'name' and 'product'

• Display stored data on console

Method overloading is having multiple methods in the same class with the same name but different parameters. Method overriding is having a method in a subclass with the same name and parameters as a method in its superclass.

• Method overloading is achieved by defining multiple methods with the same name but different parameters in the same class.

• Method overriding is achieved by creating a method in a subclass with the same name and parameters as a method in its superclass, and ...read more

To automate a scenario, write code using a testing framework like Selenium or Appium.

• Identify the scenario to be automated

• Choose a suitable testing framework

• Write code to simulate user actions and verify expected results

• Use assertions to validate test results

• Integrate with a CI/CD pipeline for continuous testing

• Example: Automating login process on a web application using Selenium WebDriver