100+ Qa Automation Testing Engineer Interview Questions and Answers

Handle upload pop up in Selenium by using sendKeys method to upload file

• Use sendKeys method to send file path to the upload input field

• Make sure to handle any pop-ups that may appear during the upload process

• Verify the successful upload by checking for any success messages or elements on the page

Program in Java to count duplicate characters in a string

• Create a HashMap to store characters and their counts

• Iterate through the string and update the counts in the HashMap

• Finally, iterate through the HashMap and count characters with count > 1

STP stands for Software Test Plan. It is a document that outlines the testing strategy, objectives, resources, and schedule for a software testing project.

• STP defines the scope, approach, resources, and schedule of testing activities.

• It helps in identifying the test environment, test deliverables, and test execution schedule.

• STP also includes the roles and responsibilities of the testing team members.

• It serves as a roadmap for the testing process and ensures that all necessar...read more

TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) are two different protocols used for data transmission over networks.

• TCP is a connection-oriented protocol that ensures reliable and ordered delivery of data packets.

• UDP is a connectionless protocol that does not guarantee delivery or order of packets.

• TCP uses handshaking to establish a connection between sender and receiver before data transfer.

• UDP is faster and more efficient for real-time applications lik...read more

Framework is a structure that provides guidelines for automation testing. Collection interface is a set of classes and interfaces for storing and manipulating data. TestNG, Cucumber, and Rest Assured are popular tools for automation testing.

• Framework is a reusable set of guidelines, coding standards, concepts, and practices that provide structure for automation testing.

• Collection interface in Java is a framework that provides a standard way to store and manipulate groups of o...read more

The step definition should match the steps in the feature file for automation testing.

• Read the step from the feature file

• Create a corresponding step definition in the automation testing framework

• Ensure the step definition accurately performs the desired action

DHCP stands for Dynamic Host Configuration Protocol, used to automatically assign IP addresses to devices on a network.

• DHCP is a network protocol that allows a server to automatically assign IP addresses to devices on a network.

• It helps in reducing the manual effort required to configure IP addresses for each device.

• DHCP servers maintain a pool of IP addresses and lease them to devices for a specific period of time.

• Devices send a DHCP request to the server when they connect t...read more

Constructor in Java is a special type of method that is used to initialize objects.

• Constructors have the same name as the class they are in.

• They do not have a return type, not even void.

• They are called when an object of a class is created.

• Constructors can be overloaded, meaning a class can have multiple constructors with different parameters.

• Example: public class Car { public Car() { // default constructor } public Car(String model) { // parameterized constructor }}

API testing involves checking various response codes to ensure the API functions correctly.

• Test for common response codes like 200 (OK), 400 (Bad Request), 401 (Unauthorized), 404 (Not Found), 500 (Internal Server Error)

• Verify the response code matches the expected result based on the API request

• Use tools like Postman or RestAssured to automate API testing and check response codes

• Check for edge cases where the API may return unexpected response codes

To create a job for CI/CD in Jenkins, you can use the Jenkins interface to configure a new job with the necessary build and deployment steps.

• Navigate to Jenkins dashboard and click on 'New Item' to create a new job

• Select the type of job you want to create (Freestyle project, Pipeline, etc.)

• Configure the job settings such as source code repository, build triggers, build steps, and post-build actions

• Set up the job to be triggered automatically by changes in the source code repo...read more

Yes, Cucumber is a Data Driven Framework.

• Cucumber allows for writing test cases in plain English using Gherkin syntax

• Data can be stored in external files like Excel, CSV, or JSON and easily integrated into test scripts

• Scenarios can be parameterized to run with different test data sets

To select an element from a drop down, locate the drop down element and use the select class in Selenium.

• Locate the drop down element using findElement() method

• Create an object of Select class using the drop down element

• Use selectByVisibleText(), selectByValue() or selectByIndex() method to select the desired option

Response codes of API are standardized status codes returned by a server in response to a client's request.

• 200 - OK: Request was successful

• 400 - Bad Request: Invalid input or missing parameters

• 401 - Unauthorized: Authentication required

• 404 - Not Found: Resource not found

• 500 - Internal Server Error: Server-side issue

API Testing is testing the application programming interface to ensure it meets functionality, reliability, performance, and security requirements.

• API Testing involves testing the communication between different software systems through APIs.

• It ensures that the API functions correctly, returns the expected results, and handles errors gracefully.

• API Testing can be done at different levels such as unit testing, integration testing, and end-to-end testing.

• Tools like Postman, Soa...read more

Parallel testing in TestNG allows running tests concurrently for faster execution.

• Use 'parallel' attribute in testng.xml file to specify parallel execution mode.

• Set 'parallel' attribute to 'methods', 'classes', or 'tests' based on the level of parallelism needed.

• Example: <suite name='MySuite' parallel='tests'>

• Use 'thread-count' attribute to specify the number of threads to use for parallel execution.

Program to print average of number series

• Create a variable to store the sum of the numbers in the series

• Create a variable to store the count of numbers in the series

• Loop through the series and add each number to the sum variable

• Increment the count variable for each number in the series

• Calculate the average by dividing the sum by the count

• Print the average

Program to print Fibonacci series

• Declare two variables to store the first two numbers of the series

• Use a loop to generate the next numbers in the series

• Print each number as it is generated

The expected output is to capitalize the first letter of each word in the input string.

• Split the input string by space to get individual words

• Capitalize the first letter of each word

• Join the words back together with a space in between

Agile is a methodology that emphasizes flexibility and collaboration. Agile Scrum is a framework for implementing Agile.

• Agile focuses on delivering working software in short iterations

• Agile values individuals and interactions over processes and tools

• Agile encourages customer collaboration and responding to change

• Agile Scrum includes ceremonies such as Sprint Planning, Daily Stand-up, Sprint Review, and Sprint Retrospective

• Sprint Planning involves the team planning the work to...read more

SOLID principles are a set of five design principles that help in creating maintainable and scalable software applications.

• SOLID stands for Single Responsibility, Open-Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion principles.

• Single Responsibility Principle (SRP) states that a class should have only one reason to change.

• Open-Closed Principle (OCP) states that a class should be open for extension but closed for modification.

• Liskov Substitution Pri...read more

Cypress folder structure and its assertions

• Cypress follows a specific folder structure for organizing test files

• The 'fixtures' folder contains static data used in tests

• The 'integration' folder contains the actual test files

• The 'plugins' folder contains custom plugins and tasks

• The 'support' folder contains reusable functions and commands

• Cypress provides various assertions for validating test results

• Common assertions include 'should', 'expect', and 'assert'

• Assertions can be use...read more

HashMap is non-synchronized and allows null values and keys, while HashTable is synchronized and does not allow null values or keys.

• HashMap is non-synchronized and not thread-safe, while HashTable is synchronized and thread-safe.

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

• HashMap is generally preferred over HashTable for non-thread-safe operations due to better performance.

Boundary value analysis is a software testing technique used to identify errors at boundaries of input ranges.

• Focuses on testing at the boundaries of input ranges

• Helps identify errors that occur at the boundaries

• Tests values at the lower and upper limits of valid ranges

• Reduces the number of test cases needed for thorough testing

Create a feature file based on given requirements

• Define the feature and scenario

• List out the steps for the scenario

• Include any necessary data tables or examples

Automation refers to the use of technology to perform tasks with minimal human intervention.

• Automation involves using software tools to execute test cases and verify expected outcomes.

• It helps in reducing manual effort, increasing test coverage, and improving efficiency.

• Examples of automation tools include Selenium, Appium, and JUnit.

TestNG is a testing framework designed to simplify a broad range of testing needs, from unit testing to integration testing.

• TestNG allows for easy configuration of test cases using annotations.

• It supports parallel execution of test methods.

• TestNG provides features like data-driven testing, parameterization, and grouping of test methods.

• It generates detailed test reports for analysis.

• TestNG integrates seamlessly with tools like Maven and Jenkins.

Scenario is used to define a single test case, while scenario outline is used to define multiple test cases using a template.

• Scenario is used for a single test case, while scenario outline is used for multiple test cases.

• Scenario outline uses placeholders (example: ) to create multiple variations of the same test case.

• Scenario outline is useful when testing the same functionality with different input data.

• Example: Scenario - Login with valid credentials. Scenario Outline - Lo...read more

Sum all positive integers from an array of strings.

• Convert each string to integer and check if it is positive

• Add all positive integers together to get the sum

Scroll handling in automation testing involves using methods to interact with scroll bars and elements on a webpage.

• Use methods like scrollToElement() to scroll to a specific element on the page

• Use actions class in Selenium to perform scroll actions like scrolling up, down, left, or right

• Handle dynamic loading of elements by scrolling to the bottom of the page to trigger the loading of more content

• Use JavaScriptExecutor to scroll to a specific position on the page

Compile time polymorphism is the ability of a programming language to select which method to execute at compile time based on the method signature.

• Compile time polymorphism is achieved through method overloading and operator overloading.

• Method overloading allows multiple methods in the same class with the same name but different parameters.

• The compiler determines which method to call based on the number and type of arguments passed.

• Example: void add(int a, int b) and void add...read more

Conflicts in git can be handled by resolving them through merging, rebasing, or using tools like git mergetool.

• Communicate with team members to understand changes causing conflicts

• Resolve conflicts by manually editing files or using git mergetool

• Use git rebase to reapply changes on top of another branch

• Merge conflicting branches after resolving conflicts

Program to count the occurrence of vowels in an array of strings

• Iterate through each string in the array

• For each string, iterate through each character and check if it is a vowel (a, e, i, o, u)

• Increment a counter for each vowel found in the string

• Repeat for all strings in the array and return the total count of vowels

Code to add elements of a multi-dimensional array

• Iterate through each element of the array and add them together

• Use nested loops to access each element in the multi-dimensional array

• Keep a running total of the sum as you iterate through the array

Layer2 and Layer3 are network layers in the OSI model, responsible for data transmission and routing.

• Layer2 (Data Link Layer) operates at the MAC address level, handling physical addressing and error detection.

• Layer3 (Network Layer) operates at the IP address level, handling routing and logical addressing.

• Layer2 switches operate at Layer2, while routers operate at Layer3.

• Examples of Layer2 protocols include Ethernet and Wi-Fi, while Layer3 protocols include IP and ICMP.

Static variables belong to the class itself, while non-static variables belong to instances of the class.

• Static variables are shared among all instances of a class

• Non-static variables are unique to each instance of a class

• Static variables are initialized only once, at the start of the program

• Non-static variables are initialized separately for each instance of the class

Static and non-static have their own disadvantages in QA automation testing.

• Static methods cannot be overridden or inherited, making it difficult to create flexible test cases.

• Non-static methods require an instance of the class to be created, which can lead to increased memory usage.

• Static methods can lead to tight coupling between classes, making it harder to maintain and update the code.

• Non-static methods may have dependencies on other parts of the code, making them harder ...read more

The parameter for a POST method in Postman is typically sent in the request body.

• Parameters are sent in the request body in key-value pairs

• Parameters can be sent as form-data, x-www-form-urlencoded, or raw JSON

• Example: {"key": "value"}

Find the second maximum number in an array

• Sort the array in descending order

• Return the element at index 1

Traversing XPath is used to navigate through the elements in a structured way.

• Use '//' to select all elements in the document, regardless of their location

• Use '/' to select direct child elements

• Use '[@attribute='value']' to select elements based on their attribute value

• Use 'following-sibling::' to select siblings that come after the current element

• Use 'preceding-sibling::' to select siblings that come before the current element

Program to print sum of 2 numbers

• Declare 2 variables to store the numbers

• Add the variables and store the result in another variable

• Print the result

Reverse the order of words in a given string.

• Split the input string by space to get individual words

• Reverse the array of words

• Join the words back together with a space in between

Reverse the characters of words in a string

• Split the string into an array of words

• Reverse each word in the array

• Join the reversed words back into a single string

Retry logic in TestNG allows for re-execution of failed test cases to improve test reliability.

• Retry logic can be implemented using the 'retryAnalyzer' attribute in TestNG annotations.

• It allows for setting a maximum number of retry attempts for failed test cases.

• Failed test cases are re-executed based on the specified retry count.

• Retry logic helps in improving test reliability by handling intermittent failures.

Polymorphism is the ability of a single function or method to operate on different types of data.

• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• There are two types of polymorphism: compile-time (method overloading) and runtime (method overriding).

• Example: Inheritance in object-oriented programming languages like Java allows for polymorphism.

The driver is typically initialized in the setup method of a test automation framework.

• Driver initialization is usually done in a setup method before test execution.

• Commonly used methods for driver initialization include WebDriverManager, System.setProperty, and driver instantiation.

• Example: WebDriverManager.chromedriver().setup();

Anagram question solved without using any inbuilt functions

• Create a function to check if two strings are anagrams by comparing the frequency of characters

• Iterate through both strings and count the frequency of each character

• Compare the frequency of characters in both strings to determine if they are anagrams

The pillars of JAVA are Inheritance, Encapsulation, Polymorphism, and Abstraction.

• Inheritance: Allows a class to inherit properties and behavior from another class. Example: class Dog extends Animal.

• Encapsulation: Bundling data and methods that operate on the data into a single unit. Example: private variables with public getter and setter methods.

• Polymorphism: Ability of a method to do different things based on the object it is acting upon. Example: method overloading and ov...read more