200+ Software Testing Engineer Interview Questions and Answers

The task is to find the maximal AND value and the number of subsequences having this maximal AND value.

• Iterate through all possible k-element subsequences of the given array

• Calculate the bitwise AND of each subsequence

• Track the maximal AND value and the count of subsequences with this value

• Return the maximal AND value and the count modulo 1000000007

For water bottle - scenarios include filling, emptying, spilling, and cleaning. For login page - scenarios include successful login, incorrect password, forgotten password, and account creation.

• Water bottle: filling with water, emptying water, spilling water, cleaning the bottle

• Login page: successful login, incorrect password, forgotten password, account creation

• Water bottle: dropping the bottle, losing the cap, refilling the bottle, carrying the bottle

• Login page: password re...read more

Reverse a given string containing alphabets, numbers, and special characters.

• Iterate through the characters of the string from end to start and append them to a new string.

• Use built-in functions like reverse() or StringBuilder in languages like Python or Java for efficient reversal.

• Handle special characters and numbers along with alphabets while reversing the string.

• Ensure to consider the constraints on the number of test cases and the length of the input string.

Interview questions for Software Testing Engineer

• Roles and responsibilities include test planning, test case creation, execution, and reporting

• Testing levels include unit, integration, system, and acceptance testing

• Sanity testing is a quick check to ensure the basic functionality is working, smoke testing is a broader check to ensure major features are working

• Severity is the impact of a defect on the system, priority is the urgency of fixing the defect

• Verification ensures the...read more

Creating public and private classes in Java is useful for encapsulation and access control.

• Creating a class as public allows it to be accessed from any other class.

• Creating a class as private restricts its access to only within the same class.

• Public classes are typically used for classes that need to be accessed by other classes or modules.

• Private classes are typically used for helper classes or internal implementation details.

• The choice between public and private depends on ...read more

Test Stub is a simulated module used in place of a real module, while Test Driver is a program that calls the module being tested.

• Test Stub is used to simulate the behavior of a module that the module under test depends on.

• Test Driver is used to invoke the module being tested and pass test cases to it.

• Test Stub is used when the dependent module is not yet developed or is unavailable.

• Test Driver is used to automate the testing process by providing inputs and checking outputs.

• E...read more

Selenium is a popular testing tool for web applications due to its flexibility, compatibility with multiple browsers, and robust features.

• Selenium supports multiple programming languages such as Java, Python, and C#, making it versatile for different teams and projects.

• It can automate testing across various browsers like Chrome, Firefox, and Safari, ensuring consistent results across different platforms.

• Selenium offers a wide range of features for web testing, including the a...read more

Regression, Retesting, Dynamic, Static, and Unit Testing are all important software testing techniques.

• Regression testing ensures that changes to the software do not introduce new bugs.

• Retesting is the process of testing a previously failed test case again after the bug has been fixed.

• Dynamic testing involves executing the code and observing its behavior.

• Static testing involves reviewing the code without executing it.

• Unit testing is the process of testing individual units or ...read more

JUnit annotations like @Before, @Test, @After are commonly used with Selenium for test automation.

• Annotations like @Before are used to set up preconditions before each test method.

• Annotations like @Test are used to mark a method as a test method.

• Annotations like @After are used to clean up after each test method.

• Annotations like @Ignore are used to skip a test method.

• Annotations like @RunWith are used to specify a custom test runner.

Questions related to software testing concepts and techniques.

• To add elements to a hashmap, use the put() method.

• To handle a dropdown, use the Select class in Selenium.

• To select a particular value from a dropdown, use the selectByVisibleText() or selectByValue() method.

• To set up Android SDK, download and install Android Studio.

• A data provider is a method used in TestNG to provide test data.

• To perform a right click in action class, use the contextClick() method.

• To remove dupli...read more

Regression testing ensures changes don't break existing functionality. Functional testing checks if software meets requirements. Smoke testing checks basic functionality.

• Regression testing verifies that changes to the software do not break existing functionality

• Functional testing checks if the software meets the specified requirements

• Smoke testing checks the basic functionality of the software

• Regression testing is usually automated

• Functional testing can be manual or automated...read more

Severity is the impact of a bug on the system while priority is the urgency of fixing it.

• Severity is the measure of how much a bug affects the system's functionality or performance.

• Priority is the measure of how urgently a bug needs to be fixed.

• A high severity bug may not have a high priority if it does not affect critical functionality.

• A low severity bug may have a high priority if it affects critical functionality.

• Both severity and priority are used to prioritize bug fixes....read more

STLC is a systematic process for testing software applications from planning to closure.

• STLC involves planning, designing, executing, and reporting on tests.

• Phases include requirement analysis, test planning, test design, test execution, and closure.

• Each phase has specific deliverables and goals to ensure quality software.

• Example: In requirement analysis, testers review requirements to identify test scenarios.

Automating CAPTCHA testing involves using tools like Selenium, OCR, and machine learning algorithms.

• Use Selenium to interact with the CAPTCHA element on the webpage.

• Integrate Optical Character Recognition (OCR) tools to read and interpret the CAPTCHA image.

• Implement machine learning algorithms to train models to solve CAPTCHAs.

• Use browser automation tools like Puppeteer to automate the entire process.

• Consider using third-party CAPTCHA solving services if necessary.

I will discuss the defect with the developer and provide evidence to support my findings.

• Schedule a meeting with the developer to discuss the defect

• Provide evidence to support the defect, such as screenshots or logs

• Explain the impact of the defect on the system or end-users

• Collaborate with the developer to find a solution

• Escalate the issue to the project manager or higher authority if necessary

Explanation of polymorphism, function overloading/overriding, virtual function, and friend function.

• Polymorphism is the ability of an object to take on many forms.

• Function overloading is having multiple functions with the same name but different parameters.

• Function overriding is having a derived class provide its own implementation of a method that is already provided by its parent class.

• Virtual functions are functions that can be overridden in derived classes.

• Friend function...read more

Time complexity refers to the amount of time taken by an algorithm to run, while space complexity refers to the amount of memory used by an algorithm.

• Time complexity is measured by the number of operations an algorithm performs, while space complexity is measured by the amount of memory an algorithm uses.

• An algorithm with a time complexity of O(n) will take longer to run as the input size increases, while an algorithm with a space complexity of O(n) will use more memory as th...read more

I would prioritize testing based on risk and impact analysis.

• Conduct a risk and impact analysis to identify critical areas that need immediate testing.

• Focus on testing the most critical functionalities first.

• Automate repetitive and time-consuming tests to save time.

• Collaborate with the development team to identify and fix issues quickly.

• Communicate with stakeholders about the impact of delayed testing and work towards a feasible solution.

Behavioral Driven Development (BDD) is a software development process that encourages collaboration between developers, testers, and business stakeholders.

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

• Scenarios are written in a specific format called Gherkin, which uses keywords like Given, When, and Then

• These scenarios serve as both documentation and automated tests

• BDD helps ensure that the development team is building the right features and ...read more

Schema is a blueprint that defines the structure of a database. I used the relational schema in my project.

• Schema is a logical representation of the entire database.

• It defines the tables, fields, relationships, and constraints.

• Relational schema is the most commonly used schema in databases.

• It organizes data into tables with rows and columns.

• Example: Employee table with columns like ID, Name, Age, Salary.

Selenium is a tool used for automating web browsers, while Cucumber is a tool used for behavior-driven development.

• Selenium is primarily used for automating web browsers to test web applications.

• Cucumber is a tool that supports behavior-driven development (BDD) by allowing tests to be written in plain language.

• Selenium requires programming knowledge to write test scripts, while Cucumber allows tests to be written in a more human-readable format using Gherkin syntax.

• Selenium c...read more

Positive testing is testing with valid inputs to check if the system behaves as expected. Negative testing is testing with invalid inputs to check if the system handles errors gracefully.

• Positive testing verifies if the system functions as expected with valid inputs.

• Negative testing verifies if the system handles errors gracefully with invalid inputs.

• Positive testing ensures that the system meets the requirements and specifications.

• Negative testing ensures that the system can...read more

Challenges faced during testing phase

• Lack of clear requirements

• Limited access to test environment

• Time constraints

• Difficulty in reproducing bugs

• Integration issues with third-party systems

• Lack of proper documentation

• Testing on multiple platforms and devices

• Dealing with unexpected errors

There are five aggregate functions available in SQL: COUNT, SUM, AVG, MIN, and MAX.

• COUNT: Returns the number of rows that match a specified condition.

• SUM: Returns the sum of a numeric column.

• AVG: Returns the average value of a numeric column.

• MIN: Returns the minimum value in a column.

• MAX: Returns the maximum value in a column.

Agile is a methodology that focuses on flexibility and adaptability, while Scrum is a specific framework within Agile that defines roles, events, and artifacts.

• Agile is a broader methodology that emphasizes flexibility and adaptability in software development.

• Scrum is a specific framework within Agile that defines roles (Product Owner, Scrum Master, Development Team), events (Sprint Planning, Daily Standup, Sprint Review, Sprint Retrospective), and artifacts (Product Backlog,...read more

Answers to common software testing questions.

• Smoke testing is a quick test to check if the basic functionality of the application is working. Sanity testing is a more thorough test to check if the major functionality of the application is working.

• Adhoc testing is an informal testing technique where the tester tries to break the application by randomly testing it without any specific test cases.

• Globalization testing is the process of testing an application to ensure that it ca...read more

Functional testing is a type of testing that verifies if the software meets the functional requirements.

• It is a black-box testing technique

• It focuses on the external behavior of the software

• It ensures that the software functions as expected

• Types of functional testing include unit testing, integration testing, system testing, acceptance testing, and regression testing