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Akanksha
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Top 30 SonarLint Interview Questions with Answers

1. What is SonarLint primarily used for?

a) Code quality analysis
b) Code compilation
c) Debugging
d) Version control
Answer: a) Code quality analysis

2. Which IDEs are supported by SonarLint?

a) IntelliJ IDEA
b) Visual Studio Code
c) Eclipse
d) All of the above
Answer: d) All of the above

3. What programming languages does SonarLint support?

a) Java
b) C++
c) Python
d) All of the above
Answer: d) All of the above

4. What is the primary goal of SonarLint?

a) To find and fix security vulnerabilities
b) To identify code quality issues and bugs early in the development process
c) To create documentation for code
d) To perform load testing
Answer: b) To identify code quality issues and bugs early in the development process

5. Which component of SonarLint is responsible for analyzing source code?

a) SonarCube
b) SonarQube
c) SonarSource
d) SonarScanner
Answer: b) SonarQube

6. How does SonarLint integrate with your IDE?

a) It's a standalone application and doesn't integrate with IDEs.
b) It's a built-in feature in some IDEs.
c) It requires a separate plugin to be installed in the IDE.
d) It runs as a web application.
Answer: b) It's a built-in feature in some IDEs.

7. Which of the following best describes SonarLint's core functionality?

a) Real-time code analysis as you type
b) Full code coverage testing
c) Source code version control
d) Automated UI testing
Answer: a) Real-time code analysis as you type

8. What does "static code analysis" mean in the context of SonarLint?

a) Analyzing code while it's executing
b) Analyzing code without executing it
c) Debugging code
d) Measuring code performance
Answer: b) Analyzing code without executing it

9. Which types of issues can SonarLint detect?

a) Syntax errors
b) Code quality issues
c) Security vulnerabilities
d) All of the above
Answer: d) All of the above

10. What does the "linter" in SonarLint refer to?

a) A tool for writing code
b) A tool for analyzing code for errors and issues
c) A tool for debugging code
d) A tool for version control
Answer: b) A tool for analyzing code for errors and issues

11. In which phase of the software development lifecycle is SonarLint typically used?

a) Design
b) Testing
c) Coding
d) Maintenance
Answer: c) Coding

12. Which of the following best describes SonarLint's approach to code quality analysis?

a) Manual code review
b) Automated code review
c) Code refactoring
d) Code profiling
Answer: b) Automated code review

13. How often should you run SonarLint code analysis?

a) Only before the code is committed
b) Periodically during development
c) After the software is released
d) Once at the end of the project
Answer: b) Periodically during development

14. What is the purpose of a SonarLint rule?

a) To define coding standards
b) To control versioning
c) To write test cases
d) To manage database schemas
Answer: a) To define coding standards

15. Which of the following is NOT a part of SonarLint's analysis report?

a) Code issues and their severity
b) Code coverage percentage
c) Code duplication information
d) Code execution logs
Answer: d) Code execution logs

16. What does "code duplication" mean in SonarLint?

a) Using the same variable name in different parts of the code
b) Repeating the same code block in multiple places
c) Copying code from one project to another
d) Using duplicate libraries in a project
Answer: b) Repeating the same code block in multiple places

17. What is the purpose of a "code smell" in SonarLint?

a) It's a pleasant fragrance to improve developer's productivity.
b) It's a concept to identify areas of code that may require attention due to potential issues.
c) It's a type of code comment.
d) It's a coding style guide.
Answer: b) It's a concept to identify areas of code that may require attention due to potential issues.

18. Which component of SonarLint helps in tracking code quality over time?

a) SonarLint IDE plugin
b) SonarScanner
c) SonarQube server
d) SonarLint rules
Answer: c) SonarQube server

19. What does the "hotspot" feature in SonarLint refer to?

a) Areas of the code with high CPU usage
b) Critical issues that need immediate attention
c) A way to set up breakpoints for debugging
d) A feature to analyze code execution paths
Answer: b) Critical issues that need immediate attention

20. Which component is responsible for uploading analysis results to SonarQube?

a) SonarLint IDE plugin
b) SonarScanner
c) SonarQube server
d) SonarLint rules
Answer: b) SonarScanner

21. What is the primary benefit of fixing issues detected by SonarLint?

a) Faster compilation times
b) Improved code readability
c) Enhanced code performance
d) Reduced technical debt and maintenance costs
Answer: d) Reduced technical debt and maintenance costs

22. How can you customize SonarLint's rules for your project?

a) You can't customize the rules; they are fixed.
b) You can customize rules through the IDE's settings.
c) You need to modify the source code to change rules.
d) You can customize rules only on the SonarQube server.
Answer: b) You can customize rules through the IDE's settings.

23. What is the purpose of a "Quality Gate" in SonarQube?

a) To block code changes from being committed to the repository
b) To ensure code compiles without errors
c) To define code review criteria
d) To check if the project meets certain quality criteria
Answer: d) To check if the project meets certain quality criteria

24. What type of vulnerabilities does SonarLint security analysis primarily focus on?

a) SQL injection vulnerabilities
b) Cross-site scripting (XSS) vulnerabilities
c) Code injection vulnerabilities
d) Memory leaks
Answer: b) Cross-site scripting (XSS) vulnerabilities

25. How does SonarLint help in ensuring code maintainability?

a) By identifying complex code and suggesting simplifications
b) By automatically generating documentation
c) By optimizing database queries
d) By reducing code redundancy
Answer: a) By identifying complex code and suggesting simplifications

26. What is the purpose of SonarLint's "Leak" rule?

a) To identify memory leaks in the code
b) To detect code duplication
c) To analyze network communication
d) To track code execution time
Answer: a) To identify memory leaks in the code

27. Which of the following is a valid way to suppress a SonarLint issue?

a) Commenting out the problematic code
b) Adding a comment in the source code
c) Disabling the rule in the IDE settings
d) Deleting the source code file
Answer: b) Adding a comment in the source code

28. What does "technical debt" mean in the context of SonarLint?

a) The amount of time spent debugging code
b) The effort needed to complete a project
c) The cost of fixing issues that are not addressed promptly
d) The total lines of code in a project
Answer: c) The cost of fixing issues that are not addressed promptly

29. What is the purpose of SonarLint's "Bug" rule?

a) To detect potential security vulnerabilities
b) To identify code quality issues
c) To identify logical errors in the code
d) To track code maintainability
Answer: c) To identify logical errors in the code

30. What is a SonarLint "profile"?

a) A user's personal settings for the IDE
b) A specific set of rules and settings applied to a project
c) A way to debug code in SonarLint
d) A type of SonarLint license
Answer: b) A specific set of rules and settings applied to a project

31. What does SonarLint's "complexity" rule focus on?

a) Identifying overly complex code structures
b) Analyzing network complexity
c) Measuring code execution time
d) Detecting code duplication
Answer: a) Identifying overly complex code structures

32. What is the main benefit of integrating SonarLint with a continuous integration (CI) system?

a) To automate the code review process
b) To optimize database queries
c) To perform load testing
d) To reduce compilation time
Answer: a) To automate the code review process

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