Top 20 Interview Questions & Answers for Developer & Tester – 2025

Getting ready for a job interview as a developer or tester? Here are the top 20 interview questions and answers to help you demonstrate your technical skills, problem-solving abilities, and experience working with a variety of tools and programming languages. Whether you're applying for a developer role, a tester role, or a combination of both, these questions cover all key areas of the job.

General Questions

• 1. Tell us about your background and experience in the field of software development and testing.
  Answer: I have a Bachelor's degree in Computer Science and five years of experience working as both a developer and a tester. During my time in the field, I have worked on various projects ranging from web development to mobile application testing. I am skilled in programming languages such as Java, Python, and JavaScript, and have experience working with testing tools such as Selenium and JIRA.
• 2. How do you stay updated on the latest trends and developments in the software industry?
  Answer: I make sure to regularly attend conferences, workshops, and webinars related to software development and testing. I also follow industry leaders and influencers on social media and read tech-focused publications to stay informed about new technologies and advancements.
• 3. Tell us about a particularly challenging project you worked on and how you overcame any obstacles.
  Answer: I worked on a project where we had to develop a mobile application for a client with an extremely tight deadline. To overcome the obstacles of time constraints and a high-pressure environment, I used agile methodology to break the project into smaller tasks and prioritize them accordingly. I also actively communicated with my team and made sure we were all on the same page to deliver the project successfully within the given timeframe.
• 4. How do you handle tight deadlines and prioritize tasks effectively?
  Answer: I like to use agile methodology to break down projects into smaller tasks and prioritize them based on their importance and level of urgency. I also make sure to communicate with my team regularly to ensure we are all on schedule and track our progress. If needed, I am not afraid to delegate tasks and seek help from teammates to meet tight deadlines.
• 5. How do you handle conflicts or disagreements with team members?
  Answer: I believe in open and honest communication. If I have a disagreement with a team member, I approach them calmly and discuss the issue openly. I also make sure to listen to their perspective and find a compromise that benefits both parties. If the conflict persists, I am not afraid to seek guidance from a manager or team leader to resolve the issue.

Technical Skills & Experience

• 6. What is your experience with test automation and which tools have you used?
  Answer: I have five years of experience with test automation and have used tools such as Selenium, Appium, and Cucumber to automate front-end and mobile application tests. I have also utilized automation frameworks such as TestNG and JUnit.
• 7. How do you approach creating and executing test plans?
  Answer: I start by thoroughly understanding the project requirements and identifying test cases. Then, I create a detailed test plan that covers all aspects of the project. I also make sure to prioritize high-risk areas and use multiple testing techniques, such as exploratory testing, to ensure comprehensive test coverage. Throughout the testing process, I document and track any issues found and provide regular updates to the team.
• 8. Explain the differences between black-box and white-box testing.
  Answer: Black-box testing is a testing method where the tester does not have access to the internal code and focuses on testing the functionality of the software. White-box testing, on the other hand, is a testing method where the tester has access to the internal code and tests the software's internal structures and logic. Black-box testing is often used for functional testing, while white-box testing is used for structural and code coverage testing.
• 9. Talk about your experience with test management tools and their importance in the testing process.
  Answer: I have experience using test management tools such as JIRA and TestRail to organize, track, and report on testing activities. These tools are instrumental in keeping teams aligned and updated on testing progress and prioritizing tasks. They also allow for efficient bug tracking and provide useful metrics to improve the overall quality of software.
• 10. How familiar are you with agile and Scrum methodologies?
  Answer: I have experience working in agile environments and utilizing Scrum methodology in particular. I believe in its benefits of flexibility, constant communication, and feedback, and have seen its effectiveness in delivering successful projects within tight deadlines.

Behavioral Questions

• 11. Tell us about a time when you had to handle a difficult bug or issue during testing.
  Answer: In my previous role, I encountered a difficult bug that was causing a significant delay in the project. I approached the issue by first analyzing the code and identifying the root cause. Then, I worked closely with the development team to find a solution and implemented a fix in a timely manner, allowing the project to continue without further delays.
• 12. Can you describe a situation where you had to communicate a complex technical issue to a non-technical stakeholder?
  Answer: In a previous project, I was responsible for testing a complex feature that was difficult to demonstrate to the client. I used clear and concise language to explain the technical issue to the client and provided visuals and comparisons to help them understand the problem. I also provided possible solutions and worked with the development team to resolve the issue promptly.
• 13. Talk about a time when you had to adapt to changing project requirements or timelines.
  Answer: In my current role, I had to adapt to changing requirements quite frequently as the project evolved. To accommodate these changes, I made sure to stay organized and prioritize my tasks accordingly while keeping the rest of the team informed. I also gave constructive feedback when necessary to ensure the project stayed on track and delivered high-quality results.
• 14. How do you handle working on multiple projects with different teams?
  Answer: In my previous role, I had to work on multiple projects simultaneously with different teams. I managed this by effectively communicating my workload with each team and creating a schedule to prioritize tasks and meet deadlines. I also made sure to collaborate and delegate tasks when needed to ensure all projects were completed successfully.
• 15. Tell us about a time when you had to learn a new programming language or tool quickly.
  Answer: In my previous role, I had to learn a new programming language to work on a project with a tight deadline. I utilized online resources and worked closely with a more experienced colleague to quickly learn the language and complete the project successfully. I was able to adapt and use my knowledge of other languages to quickly pick up the new one and deliver high-quality results.

Situational Questions

• 16. How would you handle a situation where a colleague disagreed with your approach to testing?
  Answer: I would listen to their perspective and try to understand their reasoning. If their approach has valid points, I would adapt my approach or come to a compromise. However, if I still believe my approach is the best solution, I would provide reasons and evidence to support my plan and try to find a middle ground that benefits both parties.
• 17. If a critical bug is found just before a software release, what actions would you take?
  Answer: First, I would communicate the issue to the team and provide a detailed report on the impact and possible solutions. Then, I would work closely with the development team to fix the bug and rigorously test it. If necessary, I would recommend postponing the release to ensure the bug is resolved and the software is of high quality.
• 18. In a situation where the project manager is pushing for a quick release despite known bugs, how would you handle the situation?
  Answer: I would communicate the known bugs and the potential risks of releasing without addressing them to the project manager. I would also provide possible solutions and their impacts on the project if the timeline were to be extended. The decision ultimately rests with the project manager, but I would make sure to express my concerns and provide evidence to support my recommendation.
• 19. How do you handle a situation where there is constant scope creep in a project?
  Answer: I would communicate with the project manager about the scope creep and its impact on the project timeline and quality. I would also provide suggestions to manage and prioritize the added tasks. If necessary, I would escalate the issue to a higher authority to ensure the project stays on track and deliverables are met.
• 20. In a situation where testing is falling behind schedule, how do you decide which tests to prioritize?
  Answer: I would prioritize tests based on their impact on the overall functionality of the software and the project requirements. High-risk areas and critical bugs would be prioritized first, followed by the remaining tests in order of importance. I would also collaborate with the development team and project manager to find a solution that ensures the most essential tests are completed on time.