qa interview questions

Top 55 QA Interview Questions and Answers: Tricky QA Questions 2023

Preparing for a Quality Assurance (QA) interview can be nerve-wracking, especially for freshers and professionals in specialized fields like the pharmaceutical industry. 

In this article, we’ll delve into some commonly asked QA interview questions and answers, particularly focusing on questions for freshers and those in the pharmaceutical sector. 

For those new to the field, we’ll cover fundamental concepts and basic terminology to help you build a strong foundation. For experienced candidates, we’ll explore more advanced topics that highlight your expertise.

We’ll provide insights on how to approach tricky QA interview questions, such as those about automation, regression testing, and testing strategies. 

This article aims to equip you with the knowledge and confidence to excel in your QA interview.

QA Interview Questions for Freshers 

As a fresher, you need to be well versed about your basics. Here are questions you may get asked: 

1. What is Quality Assurance (QA)?

Quality Assurance (QA) encompasses the systematic process of evaluating and enhancing the entire software development life cycle to ensure that the end product meets specified quality standards. 

It involves activities aimed at preventing defects rather than just identifying them, promoting process improvements, and maintaining consistency in development practices.

2. Explain the difference between QA and Software Testing.

Quality Assurance (QA) is a proactive process that focuses on the improvement of software development processes, methodologies, and standards to prevent defects. 

On the other hand, software testing is a reactive process that involves running the software to identify defects and ensure it meets requirements and specifications. QA addresses process aspects, while testing addresses product aspects.

3.Define Testware.

Testware encompasses all the artifacts and materials required to design, implement, and execute tests. It includes test cases, test scripts, test data, test plans, test environments, and testing tools. 

Testware ensures that testing activities are well-organized and reproducible throughout the software development life cycle.

4. What is the purpose of a Test Plan?

A test plan is a comprehensive document that outlines the testing strategy, scope, objectives, resources, schedule, and approach for a software testing project. 

It serves as a roadmap for testing activities, ensuring that testing is aligned with project goals and requirements. A well-structured test plan facilitates effective communication among team members and stakeholders and helps manage risks associated with testing.

5.Explain the concept of Bug Leakage.

Bug leakage occurs when defects that were identified and fixed in previous stages of testing or development resurface in later stages or versions. 

These defects “leak” through the testing process due to incomplete or inadequate testing. Bug leakage can be a result of poor communication, insufficient regression testing, or issues with the fixing process.

6. Differentiate between Build and Release.

A build is a version of the software produced by developers, intended for testing purposes. It may contain new features and fixes. 

A release, on the other hand, is a version of the software that is approved for deployment to users or customers. Releases undergo thorough testing, including regression testing, and are expected to be stable and relatively bug-free.

7. What is Monkey Testing?

Monkey Testing is a form of exploratory testing where random inputs and actions are applied to the software without a specific test plan. 

The goal is to identify unexpected behaviors, crashes, or defects that might not be uncovered through traditional testing methods. Monkey Testing helps uncover vulnerabilities in software that could potentially lead to failures under unpredictable conditions.

8. What is the Traceability Matrix used for?

A Traceability Matrix is a document that establishes a clear link between requirements and corresponding test cases. It ensures comprehensive test coverage by mapping each requirement to one or more test cases. 

This matrix helps teams track the progress of testing, confirm that all requirements are tested, and provide a basis for reporting and analysis.

9. Describe Test Driven Development (TDD).

Test Driven Development (TDD) is a software development methodology where developers write automated tests before writing the actual code. 

The process involves defining a test, then writing the code to make that test pass, and finally refactoring the code as needed. TDD promotes code quality, ensures that code meets requirements, and provides a safety net for future changes.

10. Explain the Purpose of Regression Testing.

Regression Testing ensures that new changes, updates, or fixes to the software do not adversely affect existing functionalities.

By retesting the software after modifications, teams can identify and fix unintended side effects or regressions, maintaining the overall integrity of the product.

11. What is Bug Release?

Bug Release refers to deploying a software version to users even though it contains known defects of low priority and severity. 

This decision is often made based on factors like time constraints, cost considerations, or the impact of the bugs on user experience. Bug releases are carefully managed, and defects are usually documented in the release notes.

12. Define Test Scenario and Test Case.

A Test Scenario is a high-level description of a testing situation or condition that involves multiple test cases. It outlines the context and the goals of testing, helping testers understand the broader picture. 

A Test Case, on the other hand, is a detailed step-by-step description of how a particular functionality or aspect of the software should be tested, including the expected outcomes.

13.What is Thread Testing?

Thread Testing involves assessing how software behaves under multiple concurrent users or threads. 

It aims to identify potential issues related to resource allocation, synchronization, and data integrity when multiple users interact with the application simultaneously.

14. Explain Cause-Effect Graphing.

Cause-Effect Graphing is a technique that minimizes the number of test cases needed to achieve thorough test coverage. It involves creating a graphical representation of cause-effect relationships among different variables and inputs. 

By identifying combinations of inputs that can trigger different outcomes, testers can optimize their testing efforts and find defects more efficiently.

15. What is Agile Testing, and why is it important?

Agile Testing is an approach that integrates testing activities within the Agile software development process. It emphasizes continuous collaboration between developers and testers, iterative testing, and rapid feedback. 

Agile Testing ensures that software is tested throughout its lifecycle, enabling early defect detection, quicker response to changes, and delivering higher quality products to customers.

15. Define the concept of a Traceability Matrix.

A Traceability Matrix is a document that establishes a link between requirements and corresponding test cases. It ensures that each requirement is tested and that all test cases have a clear basis in the requirements. 

The matrix provides a visual representation of how the testing process aligns with the project’s objectives. It aids in coverage analysis, impact assessment, and effective communication among project stakeholders.

16. Differentiate Between Smoke Testing and Sanity Testing.

Smoke Testing is a preliminary test performed on a new build to ensure that it is stable enough for further testing. It focuses on the basic functionalities to identify major defects that might prevent comprehensive testing. 

Sanity Testing, on the other hand, verifies specific changes or fixes to ensure that they did not negatively impact related functionalities. While Smoke Testing is broader and shallow, Sanity Testing is narrower and deeper, targeting specific areas.

17. Explain the concept of Load Testing.

Load Testing is a type of performance testing that assesses how well a software application performs under expected load conditions. It involves subjecting the system to various levels of concurrent user activity to identify bottlenecks, scalability issues, and performance degradation. 

Load Testing helps ensure that the application can handle the anticipated number of users and transactions without compromising response times or system stability.

18. What is Acceptance Testing?

Acceptance Testing is the final phase of testing where the software is tested to determine if it meets the specified acceptance criteria and is ready for deployment. 

It validates whether the software fulfills the user’s requirements and if it is acceptable for actual use.

Acceptance Testing can include User Acceptance Testing (UAT), where end-users validate the software, and Alpha and Beta Testing, where the software is tested in controlled and real-world environments respectively.

19. Explain the concept of Usability Testing.

Usability Testing evaluates the user-friendliness and effectiveness of a software application from the perspective of the end-user. It focuses on aspects like ease of navigation, intuitiveness of user interfaces, and overall user experience. 

Usability Testing involves real users interacting with the software and provides valuable insights into how users perceive and interact with the application, helping improve its usability and user satisfaction.

20. What is the V-Model in Software Testing?

The V-Model is a software development and testing methodology that emphasizes a strong relationship between development and testing phases. It is called the V-Model because of its graphical representation, which forms a “V” shape. 

The left side of the “V” represents the development phases (like requirements, design, and coding), while the right side represents the corresponding testing phases like unit testing, integration testing, system testing, and acceptance testing

The V-Model promotes early testing and validation of each development phase before moving to the next.

21. Explain the concept of Equivalence Partitioning.

Equivalence Partitioning is a testing technique that divides the input domain of a software component into groups or partitions that are likely to behave similarly. Each partition is representative of a range of values, and the test cases are chosen from these partitions. 

This technique helps optimize testing efforts by reducing redundant test cases and ensuring that critical areas of the input domain are adequately covered.

22. Define the concept of Alpha Testing and Beta Testing.

Alpha Testing is a type of user acceptance testing performed by the internal development team in a controlled environment before releasing the software to external users. It aims to identify issues and gather feedback before wider testing.

Beta Testing, on the other hand, is conducted by a selected group of external users in a real-world environment. It provides insights into how the software behaves in diverse settings and helps discover issues that might not have been identified in earlier testing stages.

23. Explain the concept of Grey Box Testing.

Grey Box Testing is a testing approach that combines elements of both white box and black box testing. 

Testers have partial knowledge of the internal workings of the software, allowing them to design test cases that explore both the functionality and the internal logic. 

Grey Box Testing strikes a balance between the comprehensive coverage of white box testing and the user perspective of black box testing, making it effective for detecting defects in complex applications.

24. What is the importance of Defect Tracking?

Defect Tracking is a crucial process in software testing that involves capturing, documenting, and managing defects identified during testing. It ensures that defects are properly communicated to development teams for resolution and helps track the status of defect fixes. 

Defect Tracking aids in maintaining the quality of the software by preventing unresolved defects from progressing into production and affecting end-users.

25. Explain the concept of Equivalence Class Partitioning.

Equivalence Class Partitioning is a testing technique that groups input values into classes or partitions that are expected to behave similarly. Each partition represents a range of valid or invalid inputs. 

Test cases are then designed to cover representative values from each partition. This technique is especially useful for efficiently testing software with a wide range of possible input values, helping to identify defects and ensure comprehensive coverage.

QA Interview Questions for Experienced Candidates

QA Interview Questions for Experienced Candidates

If you have a few years of work to be mentioned in your resume, QA interview questions for experienced and seasoned candidates take a notch up in difficulty level and concepts. Here is what you can expect: 

1. What do you know about thread testing?

What is a quality audit? A quality audit in software testing involves a systematic examination of the processes, practices, and deliverables to ensure compliance with established quality standards. 

It assesses whether the defined processes are being followed, identifies areas of improvement, and ensures that the testing activities align with the defined objectives and requirements.

2. What is a test case? 

A test case is a documented set of conditions or steps designed to validate specific functionalities or features of a software application. It includes details such as input data, expected outcomes, preconditions, and steps to execute. 

Test cases serve as a guide for testers to perform structured and consistent testing to ensure the software meets its intended requirements.

3.What plan or strategy will you follow for the automation test plan? 

For an Automation Test Plan, the strategy involves:

  • Requirement Analysis: Understanding the application and identifying suitable test scenarios.
  • Tool Selection: Choosing appropriate automation tools based on the project’s technology and requirements.
  • Test Case Selection: Deciding which test cases to automate for maximum coverage and efficiency.
  • Test Script Development: Creating automation scripts using chosen tools and programming languages.
  • Test Data Preparation: Setting up relevant test data required for automated test execution.
  • Execution and Reporting: Running automated tests, analyzing results, and generating reports.
  • Maintenance: Regularly updating and maintaining automated scripts as the application evolves.

4. If you are a tester, what tools will you use for testing? 

As a tester, I would use a combination of tools depending on the testing type:

  • Functional Testing: Tools like Selenium, Cypress, or TestComplete.
  • Performance Testing: Tools like JMeter or LoadRunner.
  • Defect Tracking: Tools like JIRA, Bugzilla, or TestRail.
  • Test Data Management: Tools like Mockaroo or Data Factory.
  • API Testing: Tools like Postman or SoapUI.
  • Security Testing: Tools like OWASP ZAP or Burp Suite.

5. What does stress testing mean? 

Stress testing is a type of performance testing that evaluates the behavior of a software application under extreme and beyond-normal conditions. 

It aims to identify the application’s breaking point and understand how it handles heavy loads, high user traffic, or resource constraints. The goal is to uncover performance bottlenecks, stability issues, and potential system failures.

6. What is load testing? 

Load testing is a performance testing technique that simulates real-life user loads to assess how an application performs under expected levels of concurrent user activity. 

It helps identify performance degradation, response times, and resource utilization when subjected to varying workloads.

7. What is volume testing?

Volume testing focuses on assessing an application’s scalability and performance when dealing with a large volume of data. It helps determine whether the application can handle the anticipated growth in data without performance degradation or data corruption.

8. What does a USE case include? 

A USE case is a representation of a specific interaction or scenario between an actor (user or system) and a software application. It typically includes:

  • Actor: The user or system interacting with the application.
  • Scenario: A sequence of steps describing the interaction and expected behavior.
  • Preconditions: Conditions that must be met for the scenario to start.
  • Trigger: The event that initiates the scenario.
  • Flow of Events: The step-by-step actions taken by the actor and the application.
  • Alternate Flows: Variations of the main scenario due to user decisions or system responses.
  • Postconditions: The expected state of the system after the scenario is executed.

9.What is CRUD testing? 

CRUD testing focuses on validating the basic operations that users perform on data in a software application: Create, Read, Update, and Delete. 

It ensures that data manipulation functions work as intended, data is stored and retrieved accurately. The application maintains data integrity throughout these operations.

10.How do you test CRUD? 

To test CRUD operations, you would:

  • Create: Input data and verify it is successfully stored in the database.
  • Read: Retrieve the stored data and ensure it matches the input.
  • Update: Modify existing data and verify the changes are reflected in the application.
  • Delete: Remove data and confirm it is no longer accessible. Testing each operation involves using valid, invalid, and edge-case inputs to cover various scenarios.

QA interview questions for 3+ years experience: 

Questions for QA candidates with 3+ years of experience might delve deeper into their practical knowledge and expertise. Expect questions about test automation frameworks, advanced testing methodologies, team coordination, and problem-solving. Examples include:

1. What are different tools you will need to support testing during application development? 

  • Test Management tools help manage test cases. Examples include Jira, TestRail, and HP ALM.
  • Automation Testing Tools include Selenium, Appium, and TestComplete.
  • Performance Testing Tools like JMeter and LoadRunner are used to simulate high user load
  • Security Testing Tools such as OWASP Zap and Burp Suite help identify vulnerabilities 
  • CI/CD tools like Jenkins and Travis CI help integrate automated testing into the development pipeline.
  • Code Review Tools like SonarQube and Crucible assist in reviewing code 
  • API Testing Tools Postman and SoapUI are used to test APIs and web services.
  • Database Testing Tools  like DbUnit and SQLUnit ensure the accuracy of database operations.
  • Mobile Testing Tools like Appium and Xcode Simulator aid in testing across different devices and platforms.
  • Browser Compatibility Testing Tools like BrowserStack and CrossBrowserTesting 
  • Usability Testing Tools  like UserTesting and Crazy Egg 

2. What is a test metric in software testing?

A test metric in software testing is a quantifiable measure used to assess various aspects of the testing process and the quality of the software under test. 

These metrics provide valuable insights into the effectiveness of testing efforts, help in identifying trends, and support data-driven decision-making. 

Test metrics help teams gauge the progress of testing, the coverage achieved, and the overall quality of the software being tested.

3. Can you discuss a scenario where you’ve introduced a new testing methodology or tool to enhance your team’s efficiency?

Certainly. In my previous role, I introduced Behavior-Driven Development (BDD) to improve collaboration between developers and testers. 

By writing test cases in a more natural language format, we improved communication, reduced misunderstandings, and ultimately accelerated the testing process.

4. Tell us about a situation where you’ve encountered resistance to change from your team when implementing new testing practices. How did you handle it?

I faced this challenge while transitioning to Agile methodologies. 

To overcome resistance, I organized workshops to educate the team about Agile principles, emphasizing the benefits of quicker feedback loops and improved adaptability. 

I also involved team members in process refinement, allowing them to contribute their insights and concerns.

5.Describe an instance where you’ve been involved in root cause analysis for a critical production issue. What steps did you take to identify and resolve the issue?

I was tasked with resolving a data corruption issue affecting a live application. 

I conducted an in-depth analysis, collaborating with developers and database administrators. We traced the problem back to a faulty data migration script and worked together to rectify the data, ensuring minimal impact on users and preventing future occurrences.

6.Can you explain how you’ve managed to maintain testing rigor while working in a fast-paced Agile environment with frequent iterations?

In Agile, I’ve embraced risk-based testing, focusing on critical functionalities and areas prone to defects. 

I’ve also emphasized early test automation to ensure swift regression testing and integrated testing into the continuous integration pipeline. This approach maintains testing quality without impeding development speed.

7. Tell us about a time when you’ve successfully handled a complex testing scenario involving integrations with multiple third-party systems.

I was part of a project that required seamless integration with various external APIs. I coordinated with third-party vendors, conducted thorough API testing, and simulated various data exchanges. 

By identifying compatibility issues early, collaborating with vendors, and conducting rigorous end-to-end testing, we achieved a smooth integration process.

8. What Should Your QA Documents Include?

QA documents should encompass essential aspects of the testing process, including:

  • A comprehensive Test Plan detailing testing objectives, scope, strategy, and resources.
  • Well-defined Test Cases with detailed steps, inputs, expected outcomes, and preconditions.
  • Test Data required for executing test cases accurately.
  • Detailed Defect Reports outlining identified defects with steps to reproduce.
  • Traceability Matrix linking test cases to specific requirements for coverage tracking.
  • Test Execution Reports summarizing test results, highlighting pass/fail statuses, and deviations.
  • A concluding Test Summary Report providing an overview of the testing effort, outcomes, and recommendations.

9. What is the difference between regression testing and retesting?

Regression Testing involves re-running previously executed test cases on modified code to ensure that new changes have not affected existing functionality.

Retesting, on the other hand, focuses on verifying that specific defects identified in earlier testing phases have been fixed in the current build. It ensures that the reported issues have been resolved.

10. What are the types of documents in SQA?

In Software Quality Assurance (SQA), various documents play crucial roles:

  • Test Plan: Outlining testing scope, objectives, approach, resources, and schedule.
  • Test Cases: Detailing step-by-step instructions to execute specific tests.
  • Traceability Matrix: Linking requirements to corresponding test cases for coverage tracking.
  • Defect Reports: Documenting identified defects with detailed information and steps to reproduce.
  • Test Execution Reports: Summarizing test results, highlighting pass/fail statuses, and deviations.
  • Test Summary Report: Providing an overview of the testing process, outcomes, and recommendations.

QA Interview Questions in Pharma 

The complexity of questions in pharmaceutical testing can vary from moderate to advanced, depending on the level of expertise expected from the candidates and the specific roles they are applying for. 

It’s common to encounter questions that cover both basic concepts and more intricate aspects of pharmaceutical quality assurance and testing.

1. What is GMP, and why is it important in the pharmaceutical industry?

Good Manufacturing Practice (GMP) is a set of quality assurance guidelines that ensure pharmaceutical products are consistently produced and controlled to meet quality standards. 

GMP is crucial to maintain product quality, safety, and efficacy throughout the manufacturing process.

2. Explain the concept of “validation” in pharmaceutical manufacturing.

Validation is the documented process of obtaining, recording, and interpreting data to demonstrate that a specific process consistently produces a product meeting its predetermined specifications and quality attributes. 

It ensures that equipment, processes, and systems are reliable and deliver consistent results.

3. Define “batch record” and its significance in pharmaceutical manufacturing.

A Batch Record is a comprehensive set of documents that provides detailed information about each step of the manufacturing process for a specific batch of a pharmaceutical product. 

It includes information on materials used, equipment settings, operating procedures, and quality checks. It serves as a historical record and ensures batch-to-batch consistency.

4. What is “change control” in the pharmaceutical industry, and why is it essential?

Change Control is a systematic process used to manage and assess proposed changes to equipment, processes, methods, and systems in a controlled and documented manner. It ensures that changes do not negatively impact product quality, safety, or efficacy and helps maintain regulatory compliance.

5. Explain the purpose of “cleaning validation” in pharmaceutical manufacturing.

Cleaning Validation is the process of demonstrating that equipment used in the production of pharmaceuticals is consistently cleaned to a level that prevents cross-contamination and ensures product safety.

 It is essential to prevent carryover of previous product traces or contaminants into subsequent batches.

6. What is “process deviation,” and how should it be handled in pharmaceutical manufacturing?

Process Deviation refers to any departure from established manufacturing processes or procedures. It should be documented, investigated, and assessed for its potential impact on product quality. 

Proper investigation and corrective actions are taken to prevent recurrence and ensure product integrity.

7. Define “SOP” and explain its role in the pharmaceutical industry.

Standard Operating Procedure (SOP) is a detailed, written instruction that outlines the steps to be followed for performing specific tasks in a consistent and standardized manner. SOPs are crucial in ensuring that processes are executed accurately, reducing the risk of errors and ensuring compliance with regulations.

8. What is the purpose of “quality risk management” in the pharmaceutical field?

Quality Risk Management (QRM) is a systematic process for assessing, controlling, and mitigating risks that could affect product quality, patient safety, or regulatory compliance. 

QRM ensures that potential risks are identified, evaluated, and managed effectively throughout the product lifecycle.

9. Explain “batch release” and its significance in pharmaceutical manufacturing.

Batch Release is the final step of the manufacturing process where a Qualified Person (QP) or authorized personnel reviews the batch documentation, quality control results. 

This also includes compliance with specifications before allowing the product to be released for distribution. It ensures that the product meets all quality standards and regulatory requirements.

10. Describe the concept of “Pharmacovigilance” and its role in the pharmaceutical industry.

Pharmacovigilance involves the detection, assessment, understanding, and prevention of adverse effects or any other drug-related problems. 

It ensures the safety of pharmaceutical products in the market and involves collecting and analyzing data on adverse events and taking appropriate regulatory actions if needed.

Additional Tips to Ace Your QA Interview Questions

Whether you’re just starting your QA journey or you have the understanding of QA lead roles and responsibilities, keep these additional tips in mind:

Research the Company

Familiarize yourself with the company’s products, services, and quality initiatives. This demonstrates your genuine interest in the organization and its values.

Practice Problem Solving

Many interviews include scenario-based questions. Practice articulating your approach to solving problems, even if you don’t have a definitive answer.

Highlight Soft Skills 

QA roles often require collaboration, attention to detail, and communication skills. Be ready to share examples that showcase your ability to work in teams and handle complex tasks.

Stay Up-to-Date 

If possible, stay current with industry trends, regulations, and emerging technologies in Quality Assurance.

Confidence and Positivity

Present yourself confidently and maintain a positive attitude throughout the interview. Employers value candidates who are eager to learn and contribute.

Mock Interviews

 Conduct practice interviews with friends or mentors to refine your answers and improve your interview performance.

Conclusion

Approaching an interview as a two-way street is vital, as you’re not just being evaluated, but also assessing if the company aligns with your aspirations. To ace the QA interview questions, thorough preparation is key. 

Master the QA interview questions and answers, demonstrating your expertise and versatility.

Confidence and authenticity are your allies, allowing your skills and personality to shine. Showcase your problem-solving ability, communication skills, and teamwork orientation. 

Ask insightful questions about the team structure, testing processes, and tools utilized. This demonstrates your genuine interest and helps you determine if the company is the right fit for your career goals.

With meticulous preparation and a positive attitude, you can confidently navigate the QA interview journey and find the perfect match for your professional journey. Good luck!

Rahnuma Tasnim

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