Overview: Why Basic Software Testing Knowledge Still Matters
Software testing is one of the most stable and in-demand IT career paths, especially for freshers and junior professionals.
Most interviews—whether for startups, service companies, or product firms—begin with basic interview questions in software testing.
Interviewers use these basics to evaluate:
- Logical thinking
- Understanding of testing fundamentals
- Ability to explain concepts clearly
- Readiness to work on real projects
Even experienced testers are often rejected due to weak basics.
This article on basic interview questions in software testing is ideal for:
- Freshers
- Career switchers
- Manual testers
- Entry-level QA engineers
Section 1: Basic Software Testing Interview Questions (Fundamentals)
1. What is software testing?
Software testing is the process of verifying and validating a software application to ensure that:
- It meets requirements
- It works correctly
- It is free from critical defects
2. Why is software testing important?
Software testing is important because it:
- Improves product quality
- Prevents financial loss
- Increases customer satisfaction
- Detects bugs early
3. What is the difference between verification and validation?
| Verification | Validation |
| Are we building the product right? | Are we building the right product? |
| Static process | Dynamic process |
| Reviews & inspections | Test execution |
4. What is a bug or defect?
A bug is a deviation where:
Actual Result ≠ Expected Result
5. Difference between error, defect, and failure
| Term | Description |
| Error | Human mistake |
| Defect | Bug found during testing |
| Failure | Issue seen by end user |
6. What are the levels of testing?
- Unit testing
- Integration testing
- System testing
- Acceptance testing
7. What is manual testing?
Manual testing is testing software without using automation tools, where testers:
- Execute test cases manually
- Observe behavior
- Report defects
8. What is automation testing?
Automation testing uses scripts and tools to:
- Execute repetitive test cases
- Save time
- Increase test coverage
9. Can automation testing replace manual testing?
No. Manual testing is essential for:
- Exploratory testing
- Usability testing
- New feature validation
10. What is functional testing?
Functional testing verifies whether the application works according to functional requirements.
Section 2: Test Case Interview Questions (Core Area)
11. What is a test case?
A test case is a set of steps, test data, and expected results designed to validate a feature.
12. What are the components of a test case?
- Test Case ID
- Test Scenario
- Preconditions
- Test Steps
- Test Data
- Expected Result
- Actual Result
- Status
13. What is a test scenario?
A test scenario is a high-level functionality to be tested.
Example: User login.
14. Difference between test case and test scenario
| Test Scenario | Test Case |
| High-level | Detailed |
| What to test | How to test |
15. What is positive testing?
Testing with valid input data.
16. What is negative testing?
Testing with invalid input data to ensure error handling.
17. What is boundary value analysis?
Testing values at:
- Minimum boundary
- Maximum boundary
- Just inside/outside limits
18. What is equivalence partitioning?
Dividing input data into:
- Valid partitions
- Invalid partitions
19. What makes a good test case?
- Clear and simple
- Reusable
- Independent
- Covers edge cases
20. What is regression testing?
Regression testing ensures existing functionality works after changes.
Section 3: SDLC & STLC Interview Questions
21. What is SDLC?
SDLC (Software Development Life Cycle):
- Requirement analysis
- Design
- Development
- Testing
- Deployment
- Maintenance
22. What is STLC?
STLC (Software Testing Life Cycle):
- Requirement analysis
- Test planning
- Test case design
- Test execution
- Defect tracking
- Test closure
23. Difference between SDLC and STLC
| SDLC | STLC |
| Development process | Testing process |
24. What happens in requirement analysis phase?
Testers:
- Understand requirements
- Identify test scenarios
- Clarify doubts
25. What is test planning?
Test planning defines:
- Scope
- Strategy
- Resources
- Risks
26. What is test execution?
Executing test cases and comparing:
Actual Result vs Expected Result
27. What is test closure?
Test closure includes:
- Test summary report
- Lessons learned
28. What is RTM?
RTM (Requirement Traceability Matrix) maps:
Requirements ↔ Test Cases
29. Why is RTM important?
- Ensures full coverage
- Avoids missing requirements
30. Can testing start before development?
Yes. Testers can review requirements early.
Section 4: Bug, Defect & RCA Interview Questions
31. What is defect life cycle?
- New
- Assigned
- Open
- Fixed
- Retest
- Closed
- Reopened
32. What is defect severity?
Severity shows impact of the defect.
| Severity | Impact |
| Critical | System crash |
| Major | Core feature broken |
| Minor | UI issue |
33. What is defect priority?
Priority shows urgency to fix.
34. Severity vs Priority
| Severity | Priority |
| Technical impact | Business urgency |
35. What is Root Cause Analysis (RCA)?
RCA identifies why a defect occurred.
Example:
Bug → Wrong calculation
Root cause → Missing boundary test
Section 5: Scenario-Based Interview Questions (Basic Level)
36. A bug is rejected by developer. What will you do?
- Recheck requirement
- Provide evidence
- Discuss politely
37. How do you test without documentation?
- Exploratory testing
- Understanding user flow
- Asking questions
38. Testing time is limited. How do you proceed?
- Focus on critical features
- Perform smoke testing
39. How do you test a login page?
- Valid login
- Invalid login
- Empty fields
- Password masking
40. What will you do if developer says “Works for me”?
- Share steps
- Provide screenshots
- Communicate clearly
Section 6: Automation, API & SQL (Basic Awareness)
41. What is Selenium?
Selenium is an open-source tool used for web automation testing.
42. What is API testing?
API testing validates:
- Backend logic
- Data flow
43. What is REST API?
REST APIs use HTTP methods:
- GET
- POST
- PUT
- DELETE
44. Why should testers know SQL?
SQL helps testers:
- Validate database records
- Verify business rules
SELECT * FROM users WHERE status=’ACTIVE’;
45. Can manual testers do API testing?
Yes, using tools like Postman.
Section 7: Agile Interview Questions (Basic Level)
46. What is Agile?
Agile is an iterative development approach with frequent releases.
47. Role of tester in Agile
- Participate in discussions
- Write test cases early
- Test continuously
48. What is a user story?
A feature described from user perspective.
49. What is acceptance criteria?
Conditions to mark a story as complete.
50. What is regression testing in Agile?
Testing existing features after every sprint.
Section 8: Tools Knowledge (Basic Level)
- Jira – Bug tracking
- TestRail – Test cases
- Postman – API testing
- Jenkins – CI/CD
- Selenium – Automation
Section 9: Domain-Based Testing Examples
Banking
- Login
- Fund transfer
Insurance
- Policy creation
- Claim submission
E-Commerce
- Cart
- Checkout
Section 10: Sample Test Case (Basic Interview Favorite)
Login Test Case
| Field | Description |
| Test Case ID | TC_LOGIN_01 |
| Scenario | Valid login |
| Steps | Enter valid credentials |
| Expected Result | User logged in |
Negative Test Cases
- Invalid password
- Empty fields
Quick Revision Sheet – Basic Interview Questions in Software Testing
- Testing fundamentals
- Test cases & scenarios
- SDLC & STLC
- Defect life cycle
- Basic automation, API, SQL
- Agile basics
FAQ
Q: Are basic interview questions enough to clear testing interviews?
Yes, for fresher and junior roles, basics matter the most.
Q: Is coding mandatory?
No, but basic automation awareness is helpful.