70+ Automation Test Engineer Interview Questions and Answers for Freshers

I am an Automation Test Engineer with knowledge of STLC, test plan, test case, test scenario, Selenium framework, and writing Selenium test cases.

• STLC stands for Software Testing Life Cycle and is a process followed to ensure quality in software testing.

• Test plan is a document that outlines the testing strategy, objectives, and scope of testing.

• Test case is a set of steps and conditions that are executed to verify the functionality of a software application.

• Test scenario is a...read more

Interview questions for Automation Test Engineer

• Types of wait - implicit, explicit, fluent

• Locators in Selenium - ID, Name, Class Name, Tag Name, Link Text, Partial Link Text, CSS Selector, XPath

• Grid vs WebDriver - Grid allows parallel execution on multiple machines, WebDriver executes tests on a single machine

• CSS Selector vs XPath - CSS Selector is faster, XPath is more powerful

• Types of list - ArrayList, LinkedList, Vector

• Use of Action Class - performing advanced user interac...read more

Answers to common interview questions for Automation Test Engineer position.

• Const is used for constant values that cannot be reassigned, var is used for variable declaration, and char is a data type for storing characters in programming languages.

• OOPs concepts include inheritance, encapsulation, polymorphism, and abstraction. Example: Inheritance allows a class to inherit properties and methods from another class.

• JavaScript is an asynchronous language, meaning it can execute ...read more

Selenium grid is a tool used for parallel execution of test cases on multiple machines. WebDriver is a tool for automating web applications.

• Selenium grid allows for distributed testing across multiple machines and browsers

• WebDriver is a tool for automating web applications and supports multiple programming languages

• Daily activities include writing and executing test cases, debugging issues, and reporting results

• Framework used depends on project requirements and can vary from ...read more

Multiple credentials can be logged in using data from an excel sheet.

• Read the excel sheet using a library like Apache POI

• Iterate through the rows and columns to get the data

• Use a loop to login with each set of credentials

• Assert the login success or failure for each set of credentials

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.

Different methods to identify an object using eggplant

• Using text recognition

• Using image recognition

• Using coordinates

• Using attributes

• Using tags

I would start by identifying the most repetitive and time-consuming manual tests and prioritize them for automation.

• Identify the most repetitive and time-consuming manual tests

• Prioritize the tests based on their importance and frequency

• Select the appropriate automation tool and framework

• Create test scripts and automate the identified tests

• Execute the automated tests and analyze the results

• Gradually increase the automation coverage and reduce manual testing

Creating a collection from a string involves splitting the string into elements and storing them in a data structure.

• Use the split() method to divide the string into an array. Example: 'a,b,c'.split(',') results in ['a', 'b', 'c'].

• Choose a collection type based on requirements: Array, List, Set, etc.

• For unique elements, consider using a Set. Example: new Set('aabb') results in ['a', 'b'].

• If order matters, use an Array or List. Example: ['apple', 'banana', 'cherry'] maintains ...read more

A 408 status in API testing in Postman is received when the server times out while waiting for a request.

• 408 status code indicates that the server did not receive a complete request within the time that it was prepared to wait.

• This can happen if the client takes too long to send the request or if the server is overloaded.

• It is important to adjust timeout settings in Postman to avoid receiving 408 status codes.

• Example: If the server expects a request to be completed within 10 ...read more

Read command line arguments in Python to execute functions based on user input.

• Use the 'sys' module to access command line arguments: `import sys`.

• Access arguments via `sys.argv`, which is a list of command line inputs.

• Example: `sys.argv[0]` is the script name, `sys.argv[1]` is the first argument.

• Define functions and use conditional statements to execute based on input.

• Example: `if sys.argv[1] == 'test': run_test_function()`.

Yes, a private constructor in Java restricts instantiation and is often used in singleton patterns or utility classes.

• Singleton Pattern: A class can have a private constructor to ensure that only one instance of the class is created. Example: public class Singleton { private static Singleton instance; private Singleton() {} public static Singleton getInstance() { if (instance == null) { instance = new Singleton(); } return instance; }}

• Utility Classes: Classes that contain sta...read more

Creating persistent automation involves ensuring scripts run after system restarts using services or scheduled tasks.

• Use a service manager (e.g., systemd on Linux) to run automation scripts on startup.

• Create a scheduled task in Windows Task Scheduler to trigger automation scripts after reboot.

• Implement a watchdog mechanism to restart automation if it fails unexpectedly.

• Store automation state in a database or file to resume from the last checkpoint after a restart.

• Utilize cont...read more

To identify objects in Selenium, we use locators such as ID, Name, Class Name, XPath, CSS Selector, etc.

• Locators are used to identify web elements on a page

• ID and Name are the most commonly used locators

• XPath and CSS Selector are more powerful but slower

• Class Name is useful for identifying multiple elements with the same class

• Locators can be used with findElement() and findElements() methods

• Example: driver.findElement(By.id("username"));

Feature files contain high-level description of the functionality to be tested, while step definitions are the implementation of the steps in the feature file using code.

• Feature files are written in Gherkin syntax and describe the behavior of the application in plain text.

• Step definitions are written in programming languages like Java, Ruby, etc., and map the steps in the feature file to automation code.

• Feature files and step definitions together form the basis of Behavior Dr...read more

Inheritance is a mechanism in object-oriented programming where a class inherits properties and behaviors from another class. Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• Inheritance allows for code reusability by defining a new class based on an existing class.

• Polymorphism enables flexibility in programming by allowing objects to be treated as instances of their parent class.

• Example of inheritance: Class B inheriting from C...read more

In Playwright, the alternative for @Test annotation is using the test function from the Playwright Test framework.

• Playwright uses the 'test' function to define test cases, similar to @Test in other frameworks.

• Example: 'test('should load the homepage', async () => { ... });'

• You can group tests using 'describe' blocks: 'describe('Homepage tests', () => { ... });'

• Playwright supports various assertions through the 'expect' function, e.g., 'expect(page).toHaveTitle('Home');'

Assertions in Playwright validate expected outcomes in automated tests, ensuring application behavior meets requirements.

• Use 'expect' from Playwright's test library to create assertions.

• Example: expect(page.title()).toBe('Expected Title');

• Assertions can check various conditions like visibility, text content, and element states.

• Example: expect(await page.isVisible('selector')).toBe(true);

• Assertions can be chained for more complex validations.

• Example: expect(element).toHaveText...read more

The question is about Selenium waits, locators, exception handling, alerts, frames, and TestNG.

• Selenium waits are used to synchronize the test script with the application under test

• Locators are used to identify web elements on a web page

• Exception handling is used to handle errors and exceptions that occur during test execution

• Alerts are used to handle pop-up windows that appear during test execution

• Frames are used to handle web pages that contain multiple frames

• TestNG is a te...read more

List of common WebDriver exceptions

• NoSuchElementException - When an element is not found in the DOM

• TimeoutException - When a command takes too long to complete

• StaleElementReferenceException - When an element is no longer attached to the DOM

• ElementNotVisibleException - When an element is present in the DOM but not visible

• ElementNotInteractableException - When an element is present in the DOM but not interactable

• InvalidElementStateException - When an element is in an invalid st...read more

This question covers topics like reversing a string, array vs ArrayList, map and HashMap, explicit wait expected conditions, and performing mouse over on a WebElement.

• To reverse a string, you can use the StringBuilder class and its reverse() method.

• An array is a fixed-size data structure, while an ArrayList is a dynamic-size data structure.

• Map is an interface that represents a mapping between a key and a value, while HashMap is an implementation of the Map interface.

• Explicit ...read more

Test case is a set of conditions or variables under which a tester will determine whether a system under test satisfies requirements. Test plan is a document outlining the scope, approach, resources, and schedule of testing activities. Test scenarios are detailed descriptions of possible interactions with the system.

• Test case: specific conditions to be tested, expected results, steps to execute

• Test plan: overall strategy for testing, including objectives, resources, schedule

• T...read more

The return would be the number of tabs open in the browser.

• The return value would be an integer representing the count of open tabs.

• For example, if there are 5 tabs open, the return value would be 5.

Use Selenium WebDriver to capture screenshot on test case failure

• Use Selenium WebDriver's getScreenshotAs method to capture screenshot

• Save the screenshot to a specified location on the system

• Include the screenshot capture code in the test case failure handling logic

Code writing task for Automation Test Engineer position

• Open Notepad

• Write code for the given task

• Share screen to show the code

• Ensure code is well-structured and follows best practices

Type coercion is the process of converting one data type to another in programming.

• Type coercion can happen implicitly or explicitly in programming languages.

• Implicit type coercion occurs when the language automatically converts data types during operations.

• Explicit type coercion occurs when the programmer manually converts data types using functions or operators.

• Example: In JavaScript, the addition operator (+) can perform implicit type coercion by converting a number to a s...read more

Program to find character occurances in 'Hello World'

• Create a map to store character occurrences

• Iterate through each character in the string and update the map

• Print the character occurrences from the map