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Explore our carefully curated catalog of interview essentials covering full-stack, data structures and algorithms, system design, data science, and machine learning interview questions

Testing

100 Testing interview questions

Only coding challenges
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Testing Fundamentals


  • 1.

    What is software testing, and why is it important?

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  • 2.

    Define the difference between verification and validation in software testing.

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  • 3.

    Explain the software development life cycle and the role testing plays in each phase.

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  • 4.

    What are the different levels of software testing?

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  • 5.

    Describe the difference between static and dynamic testing.

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  • 6.

    What is a test case, and what elements should it contain?

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  • 7.

    Explain the concept of coverage in testing and the main types of coverage (e.g., line, branch, path, statement).

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  • 8.

    What is the difference between white-box, black-box, and grey-box testing?

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  • 9.

    What is regression testing, and why is it performed?

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  • 10.

    Explain unit testing and which tools you might use for it.

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  • 11.

    What is integration testing and what are its types?

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  • 12.

    What is system testing, and how does it differ from other types of testing?

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  • 13.

    Define acceptance testing and describe its types.

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  • 14.

    What are the benefits of test automation?

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  • 15.

    When would you choose not to automate test cases?

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Test Design Techniques


  • 16.

    What is equivalence partitioning in software testing?

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  • 17.

    Explain boundary value analysis with an example.

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  • 18.

    What is state transition testing, and where is it useful?

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  • 19.

    Describe the concept of decision table testing.

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  • 20.

    What is pairwise testing, and what tools support this technique?

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  • 21.

    How do you prioritize test cases in a test suite?

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  • 22.

    Explain error guessing and its effectiveness.

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  • 23.

    What is exploratory testing, and how is it structured?

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  • 24.

    Describe the use-cases for model-based testing.

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Test Management


  • 25.

    What is a test plan, and what should it typically include?

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  • 26.

    Describe test strategy and its importance.

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  • 27.

    Explain the concept of a test charter in exploratory testing.

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  • 28.

    What is a test data management process?

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  • 29.

    Define risk-based testing and its benefits.

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  • 30.

    How do you track and manage defects in software testing?

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  • 31.

    What is the role of a test lead or test manager in a testing team?

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  • 32.

    Describe the challenges in test environment management.

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  • 33.

    What tools are available for test management, and how do they differ?

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  • 34.

    Explain what a traceability matrix is and how it is used in testing.

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  • 35.

    What are the key metrics used to measure test progress and coverage?

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Automation Testing


  • 36.

    What are the criteria to decide whether a test should be automated?

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  • 37.

    Describe the Page Object Model in automated testing.

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  • 38.

    Explain the advantages and disadvantages of record and playback in test automation.

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  • 39.

    What is continuous integration, and how does it relate to test automation?

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  • 40.

    Which automation testing tools are you familiar with, and what are their strengths?

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  • 41.

    What is keyword-driven testing, and how does it work?

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  • 42.

    How does test automation fit into a DevOps environment?

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  • 43.

    What are the main challenges you have faced in test automation?

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  • 44.

    Explain the use of assertions in automated tests.

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  • 45.

    What is data-driven testing, and how can it be implemented?

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Performance Testing


  • 46.

    What is performance testing, and how does it differ from functional testing?

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  • 47.

    Describe the subtypes of performance testing (e.g., load, stress, capacity).

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  • 48.

    What are the key performance testing metrics?

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  • 49.

    Explain how to set up a performance test.

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  • 50.

    What tools can be used for performance testing, and what factors influence their selection?

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  • 51.

    What is a performance bottleneck, and how is it identified and addressed?

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  • 52.

    Explain the performance testing lifecycle.

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Security Testing


  • 53.

    What is security testing and why is it important?

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  • 54.

    Describe common security threats that testing should address.

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  • 55.

    What is OWASP, and why is it significant in security testing?

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  • 56.

    Explain SQL injection and how you test for it.

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  • 57.

    How do you perform authentication and authorization checks in security testing?

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  • 58.

    What tools can be used for security testing?

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  • 59.

    What is penetration testing, and how is it executed?

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  • 60.

    What is the role of encryption and secure communication in testing?

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Mobile and Web Application Testing


  • 61.

    How does mobile application testing differ from desktop application testing?

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  • 62.

    Explain different types of mobile application testing, such as native, web, and hybrid.

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  • 63.

    What emulators are available for mobile testing, and when would you use real devices?

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  • 64.

    What is responsive testing, and how is it conducted?

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  • 65.

    Describe challenges unique to mobile application testing.

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  • 66.

    What is cross-browser testing?

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  • 67.

    What are the key areas to focus on in web application testing?

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Test Automation Frameworks


  • 68.

    What is a test automation framework?

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  • 69.

    Describe different types of test automation frameworks (e.g., data-driven, keyword-driven, hybrid, modular).

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  • 70.

    What considerations are involved in choosing a test automation framework?

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  • 71.

    How can you ensure maintainability of an automation framework?

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  • 72.

    How is reporting implemented in automation frameworks?

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API Testing


  • 73.

    What is API testing, and why is it important?

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  • 74.

    How do you approach testing RESTful APIs?

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  • 75.

    Explain how to test SOAP-based web services.

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  • 76.

    What kind of tests would you write for an API?

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  • 77.

    Describe how to use Postman for API testing.

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  • 78.

    What is contract testing, and which tools support this type of API testing?

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Quality Assurance Processes


  • 79.

    What is quality assurance, and how does it differ from testing?

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  • 80.

    Describe the QA process in agile development.

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  • 81.

    Explain the role of a QA engineer in a scrum team.

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  • 82.

    What quality metrics are important for a software project?

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  • 83.

    How do you establish a QA process in an organization that has none?

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Advanced Testing Topics


  • 84.

    What are the emerging trends in software testing, such as AI and ML applications?

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  • 85.

    How do you handle testing in a continuous delivery environment?

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  • 86.

    Describe the concept of shift-left testing.

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  • 87.

    What is chaos engineering, and how do you apply it?

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  • 88.

    Explain the role of virtualization in software testing.

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Behavioral Testing Questions


  • 89.

    How do you stay updated about new testing technologies and practices?

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  • 90.

    Describe a situation where you had to meet a tight deadline for testing. How did you handle it?

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  • 91.

    How do you handle disagreements with developers regarding bugs or software issues?

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  • 92.

    Can you explain your approach to testing a feature with unclear requirements?

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  • 93.

    Describe a particularly challenging bug or issue you’ve had to deal with.

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Situation-based Testing Questions


  • 94.

    How would you test an ATM machine as an end-user?

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  • 95.

    Imagine you have a website that is experiencing performance issues. How would you test to find the cause?

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  • 96.

    Given an e-commerce application, how would you carry out security testing?

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  • 97.

    How would you approach testing a new software application with no documentation available?

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  • 98.

    Describe how you would test a new feature that interacts with multiple systems.

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Technical Testing Questions


  • 99.

    Write a basic SQL query to fetch records from a customer table where the customer’s age is more than 30 years.

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  • 100.

    Given a function that calculates the nth Fibonacci number, how would you test it?

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