100+ Qa Automation Testing Engineer Interview Questions and Answers

Selenium components include Selenium IDE, Selenium RC, Selenium WebDriver. Different locators are ID, Name, Class Name, Tag Name, Link Text, Partial Link Text, CSS Selector and XPath. Selenium WebDriver is a tool used to automate web application testing. XPath is a language used to navigate through XML documents and web pages.

• Selenium components: Selenium IDE, Selenium RC, Selenium WebDriver

• Different locators: ID, Name, Class Name, Tag Name, Link Text, Partial Link Text, CSS ...read more

To convert JSON object to string, use JSON.stringify(). To convert string to JSON object, use JSON.parse().

• JSON.stringify() method converts a JavaScript object or value to a JSON string.

• JSON.parse() method parses a JSON string and returns a JavaScript object.

• Example: var obj = {name: 'John', age: 30}; var jsonString = JSON.stringify(obj); var jsonObj = JSON.parse(jsonString);

• Make sure the JSON string is valid, else it will throw an error.

Answering questions related to Robot Framework and its standard libraries, architecture, setup and teardown, and a sample login script.

• Standard libraries in Robot Framework include BuiltIn, Collections, DateTime, Dialogs, OperatingSystem, Process, Screenshot, String, Telnet, and XML.

• Robot Framework architecture consists of test cases, test suites, and keywords.

• Setup and teardown are pre and post conditions for test cases.

• Sample login script using Robot Framework:

• Open Browser ...read more

Program to find elements of a list with least difference in Python

• Sort the list

• Find the minimum difference between adjacent elements

• Return the elements with minimum difference

Lists are a collection of ordered and changeable elements. They have various functions to manipulate the data.

• Lists are created using square brackets []

• They can contain any data type such as strings, integers, or even other lists

• Functions include append(), insert(), remove(), pop(), sort(), and reverse()

• Example: my_list = ['apple', 'banana', 'cherry']

• Example: my_list.append('orange') adds 'orange' to the end of the list

To check if every step has a corresponding step definition, we can use a code coverage tool.

• Use a code coverage tool to analyze the step definition file and identify any missing steps

• Ensure that all steps in the feature file are covered by the step definition file

• Regularly review and update the step definition file to ensure it stays up-to-date with the feature file

ARP stands for Address Resolution Protocol. It is used to map IP addresses to MAC addresses on a local network.

• ARP is used to resolve IP addresses to MAC addresses on a local network.

• ARP works by broadcasting a request for the MAC address of a specific IP address on the network.

• Yes, ARP entries can be deleted using the 'arp -d' command.

• ARP entries have a timeout period, typically around 2 minutes, after which they are removed from the ARP table.

• ARP Poisoning is a type of atta...read more

User story is a description of a feature from an end-user perspective, and sprint is a time-boxed iteration in Agile development.

• User story is a short, simple description of a feature told from the perspective of the person who desires the new capability.

• Sprint is a time-boxed iteration in Agile development, usually lasting 1-4 weeks, where a team works on a set of user stories.

• User stories are written in a specific format: 'As a [type of user], I want [some goal] so that [so...read more

To check network connectivity speed, use tools like speedtest.net. Debug by checking for network congestion or hardware issues. Increase frame size by adjusting MTU. Capture frames using tools like Wireshark.

• Use tools like speedtest.net to check network connectivity speed

• Debug by checking for network congestion, hardware issues, or misconfigured settings

• Increase frame size by adjusting Maximum Transmission Unit (MTU)

• Capture frames using tools like Wireshark for packet analysi...read more

SQL query to select and display the name of person with highest salary among employees.

• Use the MAX() function to find the highest salary

• Join the employee table with the salary table using a common key like employee_id

• Select the name of the person with the highest salary

If not meeting requirement in testcase, follow documentation format like updating test case steps, expected results, and defect details.

• Update the test case steps to accurately reflect the actual steps taken during testing

• Update the expected results to reflect the actual results observed during testing

• Document the defect details including steps to reproduce, screenshots, and any additional information

• Assign a severity and priority to the defect based on its impact on the syst...read more

The interview question covers Java programming, Selenium automation, OOPs concepts, and testing concepts.

• Use equals() method in Java to compare two strings for exact match

• Use dragAndDrop() method in Selenium for drag and drop functionality

• Use Select class in Selenium for handling dropdowns

• OOPs concepts include encapsulation, inheritance, polymorphism, and abstraction

• Selenium waits can be implemented using WebDriverWait class

• Regression testing ensures that new code changes do ...read more

Python program to move all zeros to the end of a list while maintaining the order of non-zero elements.

• Iterate through the input list and separate non-zero elements into one list and zeros into another list.

• Concatenate the non-zero list with the zero list to get the desired output.

• Print the final list with zeros at the end.

VLAN stands for Virtual Local Area Network, used to logically segment a network into multiple virtual networks.

• VLANs help in improving network security by isolating traffic between different departments or groups.

• They can also help in optimizing network performance by reducing broadcast traffic.

• VLANs are configured at the switch level and allow devices in different VLANs to communicate with each other based on routing rules.

• For example, in a company network, VLANs can be set ...read more

RIP is a distance vector routing protocol while OSPF is a link-state routing protocol. OSPF uses Dijkstra algorithm for routing.

• RIP stands for Routing Information Protocol and OSPF stands for Open Shortest Path First.

• RIP uses hop count as the metric for path selection while OSPF uses cost.

• OSPF is more scalable and efficient than RIP as it converges faster and supports VLSM.

• OSPF uses areas to divide the network into smaller domains for better management and reduced routing tra...read more

Fibonacci sequence is a mathematical pattern where each number is the sum of the two preceding ones.

• Fibonacci sequence is a series of numbers where each number is the sum of the two preceding ones.

• The sequence starts with 1, 2, then each subsequent number is the sum of the two previous numbers (1+2=3, 2+3=5, 3+5=8, and so on).

• This sequence is used in estimating because it reflects natural growth patterns found in nature.

To fetch data from a table row dynamically, use a unique identifier to locate the row and extract the data.

• Identify a unique identifier for the row, such as an ID or class name

• Use a query selector or XPath to locate the row based on the identifier

• Extract the data from the row using appropriate methods or functions

Cisco switches are known for their reliability, advanced features, and high price point compared to other company switches.

• Cisco switches are known for their high quality and reliability.

• Cisco switches offer advanced features such as VLAN support, QoS, and security options.

• Cisco switches are typically more expensive than switches from other companies.

• White box switches are generic, off-the-shelf switches that are not branded by a specific company.

• White box switches are often ...read more

I have worked on multiple modules of ERPs including finance, inventory, and human resources.

• Finance module: Managed financial transactions, budgeting, and reporting.

• Inventory module: Handled stock management, procurement, and order fulfillment.

• Human resources module: Oversaw employee information, payroll, and performance management.

Automate script to navigate to Facebook, login with invalid credentials, and verify error message using page object model.

• Create a page object model for Facebook login page

• Use automation tool like Selenium to navigate to Facebook and enter invalid credentials

• Verify error message displayed on the page using assertions

ICMP stands for Internet Control Message Protocol. It is used for network troubleshooting and diagnostic purposes.

• ICMP is a protocol used by network devices to communicate error messages or operational information.

• Ping is a tool that uses ICMP to send echo requests to a target host and waits for an echo reply.

• Ping works by sending an ICMP echo request packet to the target host, which then responds with an echo reply if it is reachable.

• ICMP can also be used for other purposes ...read more

Yes, I have created the test plan document at the start of the project.

• Yes, I always create a test plan document at the beginning of a project to outline the testing approach and strategy.

• The test plan document includes details on scope, objectives, resources, schedule, and test cases.

• It helps in ensuring that all stakeholders are aligned on the testing process and expectations.

• For example, in my previous project, I created a detailed test plan document that was reviewed and ...read more

Sorting a hashmap using keys without any method involves iterating through the keys and rearranging them in ascending order.

• Iterate through the keys of the hashmap

• Compare each key with the next key and swap them if they are in the wrong order

• Continue this process until all keys are in ascending order

I have used technologies like Selenium, JUnit, TestNG, Cucumber, and Jenkins in my testcases.

• Selenium

• JUnit

• TestNG

• Cucumber

• Jenkins

Using Ready API Groovy script to retrieve test data

• Use the testRunner object to access test data

• Retrieve test data using testRunner.testCase.getPropertyValue('propertyName')

• Store the retrieved test data in a variable for further use

SDLC stands for Software Development Life Cycle, while STLC stands for Software Testing Life Cycle.

• SDLC is the process of developing software from planning to deployment, while STLC is the process of testing software within the SDLC.

• SDLC includes phases like requirements gathering, design, development, testing, and deployment, while STLC focuses solely on testing activities.

• SDLC is broader and encompasses the entire software development process, while STLC is specific to test...read more

Dropdowns in Selenium can be handled using Select class in Selenium WebDriver.

• Use Select class from Selenium WebDriver to interact with dropdowns

• Identify the dropdown element using its locator (id, name, class, etc.)

• Create a Select object by passing the dropdown element as a parameter

• Use Select object methods like selectByVisibleText(), selectByValue(), selectByIndex() to interact with dropdown options

Java program to reverse string and check if it is a palindrome.

• Create a function to reverse the input string.

• Compare the reversed string with the original string to check if it is a palindrome.

• Use built-in functions like StringBuilder or StringBuffer for string manipulation.

• Handle cases where input is null or empty.

Cypress is a JavaScript-based end-to-end testing framework. It differs from Selenium in terms of architecture, ease of use, and speed.

• Cypress is a JavaScript-based testing framework for web applications.

• It provides a simple and intuitive API for writing tests.

• Cypress runs directly in the browser and can access everything on the page.

• Unlike Selenium, Cypress does not use WebDriver and has a different architecture.

• Cypress offers automatic waiting for elements and actions, makin...read more

Removing static keyword from main function will not have any impact on the program's functionality.

• Removing static keyword from main function will not affect the program's execution.

• The main function in C/C++ is always called by the operating system, regardless of whether it is static or not.

• Static keyword in main function is optional and does not change the behavior of the program.

ERPs stand for Enterprise Resource Planning systems.

• ERPs are software systems that integrate and manage various business processes and functions.

• They provide a centralized database and a suite of applications to streamline operations.

• ERPs typically include modules for finance, human resources, supply chain management, and customer relationship management.

• Examples of popular ERPs include SAP, Oracle ERP Cloud, and Microsoft Dynamics 365.

• ERPs help organizations improve efficien...read more

JavaScript is used in QA automation testing for handling dynamic elements, performing validations, and interacting with APIs.

• JavaScript is used to handle dynamic elements on a webpage that cannot be easily accessed using web element methods.

• JavaScript can be used to perform validations and assertions on the webpage, such as checking for the presence of certain elements or text.

• JavaScript is also commonly used to interact with APIs and perform API testing in QA automation.

• For ...read more

Print a pattern of stars in a pyramid shape.

• Use nested loops to print spaces and stars in the desired pattern.

• Start with one star at the top and increase the number of stars in each row.

• Adjust the spacing to create the pyramid shape.

To separate elements based on data type and remove duplicates from a list

• Create separate lists for each data type (string, integer, etc.)

• Iterate through the original list and add elements to respective lists based on data type

• Remove duplicates from each list using a set or other data structure

• Combine all lists into a single list without duplicates

The program will count and print the occurrence of each character in a given string.

• Create an array to store the count of each character (initialize with 0)

• Iterate through the string and increment the count of each character in the array

• Print the count of each character along with the character itself

Git stash is used to temporarily store changes that are not ready to be committed.

• Git stash is used to save changes that are not ready to be committed, allowing you to switch branches or work on something else.

• It is useful when you want to temporarily store changes without committing them.

• You can later apply the stashed changes back to your working directory.

• Example: git stash save 'work in progress'

• Example: git stash apply

Logic to find duplicate numbers and their count in a given list.

• Iterate through the list and store each number in a hashmap with its count

• If a number is already in the hashmap, increment its count

• After iterating, check the hashmap for numbers with count greater than 1 to find duplicates

findElements method in Selenium returns a list of WebElements or an empty list if no elements are found.

• findElements method returns a list of WebElements

• If no elements are found, it returns an empty list

• Return type is List

Cucumber knows the step definition file based on the annotations provided in the feature files.

• Cucumber uses annotations like @Given, @When, @Then to map steps in feature files to corresponding step definition methods.

• Step definition files are typically placed in a separate package or directory within the project structure.

• Cucumber scans the project directory for step definition files based on the package structure and annotations used in feature files.

During the initial testing cycle of a project, focus is on establishing test cases, setting up test environments, and identifying potential issues.

• Creating test cases based on requirements

• Setting up test environments

• Identifying potential issues and risks

• Executing test cases and reporting defects

• Collaborating with developers to resolve issues

Testing matrix is a tool used to track test coverage and automation ROI is the return on investment from implementing automation testing.

• Testing matrix is a visual representation of test cases, test scenarios, and their coverage across different platforms, browsers, devices, etc.

• Automation ROI is the measure of the benefits gained from automation testing compared to the costs incurred in implementing and maintaining the automation framework.

• Automation ROI can be calculated by...read more

Reverse a string and sort an array of strings in descending order.

• Create a function to reverse a string using built-in methods or loops.

• Use a sorting algorithm like bubble sort or quicksort to sort the array in descending order.

• Ensure the array contains strings for sorting to work properly. Example: ['apple', 'banana', 'cherry']

Comparing different concepts in QA Automation Testing Engineer

• Array - Data structure used to store multiple values of the same type

• Prime number - A number that is only divisible by 1 and itself

• Second Highest salary - Finding the second highest salary in a list of salaries

• Validate the CSS value - Ensuring that the CSS value meets the specified criteria

• Excel reading - Extracting data from an Excel file for testing purposes

Types of hooks in BDD include Before, After, BeforeStep, AfterStep, BeforeFeature, AfterFeature, BeforeScenario, AfterScenario.

• Before - runs before each scenario

• After - runs after each scenario

• BeforeStep - runs before each step in a scenario

• AfterStep - runs after each step in a scenario

• BeforeFeature - runs before each feature

• AfterFeature - runs after each feature

• BeforeScenario - runs before each scenario

• AfterScenario - runs after each scenario

Method overloading is when multiple methods in the same class have the same name but different parameters. Method overriding is when a subclass provides a specific implementation of a method that is already provided by its superclass.

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

• Method overriding occurs when a subclass provides a specific implementation of a method that is already provided by its superclass...read more

I have used various types of locators in my project, including ID, name, class name, xpath, and CSS selectors.

• ID locator: Used to locate elements by their unique ID attribute.

• Name locator: Used to locate elements by their name attribute.

• Class name locator: Used to locate elements by their class name attribute.

• XPath locator: Used to locate elements using XPath expressions.

• CSS selector locator: Used to locate elements using CSS selectors.

Some drawbacks of Selenium include limited support for handling non-browser windows, lack of built-in reporting capabilities, and difficulty in testing mobile applications.

• Limited support for handling non-browser windows (pop-ups, alerts, etc.)

• Lack of built-in reporting capabilities, requiring integration with third-party tools like TestNG or JUnit

• Difficulty in testing mobile applications due to the need for additional tools like Appium

• Selenium scripts can be brittle and pron...read more