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Developer Maintainability
Foundation JAVA Exam
Question 1. Which of the following best defines software maintainability? A) The ability to run on multiple platforms B) The ease with which a software system can be modified to correct faults, improve performance, or adapt to a changed environment C) The speed with which a program executes D) The capacity to handle a large number of users Answer: B Explanation: Maintainability focuses on how easy it is to modify software to fix defects, improve features, or respond to new requirements.
Developer Maintainability
Foundation JAVA Exam
Question 2. Why is high software maintainability important for businesses? A) It reduces development costs and time for future changes B) It helps in increasing the number of features quickly C) It guarantees zero bugs D) It eliminates the need for testing Answer: A Explanation: High maintainability lowers future modification costs and reduces the time required for updates or bug fixes. Question 3. Which type of software maintenance involves fixing defects found after deployment?
Developer Maintainability
Foundation JAVA Exam
D) Fixing typographical errors in documentation Answer: C Explanation: Adaptive maintenance involves updating software for changes in its environment, such as operating system or hardware upgrades. Question 5. Which of the following is an example of perfective maintenance? A) Fixing a null pointer exception B) Adding logging for better traceability C) Refactoring code for readability D) Enhancing the user interface for better usability
Developer Maintainability
Foundation JAVA Exam
Answer: D Explanation: Perfective maintenance includes enhancements to improve performance or usability without changing existing functionality. Question 6. Preventive maintenance aims to: A) Add new modules B) Improve code quality and prevent future issues C) Increase code performance D) Upgrade third-party libraries Answer: B Explanation: Preventive maintenance addresses potential future problems by improving code structure or documentation.
Developer Maintainability
Foundation JAVA Exam
A) A metric indicating program execution speed B) A metric estimating the ease of maintaining code based on several code metrics C) A measure of software security D) A tool for evaluating user satisfaction Answer: B Explanation: MI combines metrics like cyclomatic complexity, lines of code, and comment ratio to assess maintainability. Question 9. Cyclomatic complexity is a metric that measures: A) Number of classes in a project B) Number of methods in a class
Developer Maintainability
Foundation JAVA Exam
C) Number of independent paths through a program’s source code D) Amount of documentation Answer: C Explanation: Cyclomatic complexity quantifies the number of linearly independent paths, indicating code complexity. Question 10. High cyclomatic complexity in a method suggests: A) The method is simple to maintain B) The method is likely easy to test C) The method may be difficult to maintain and test D) The method has no logical branches Answer: C
Developer Maintainability
Foundation JAVA Exam
Question 12. Halstead Volume is calculated to determine: A) The amount of hardware memory used B) The size and complexity of software code based on operators and operands C) The number of classes D) Number of UI screens Answer: B Explanation: Halstead Volume uses counts of operators and operands to gauge code’s understandability and complexity. Question 13. A high comment frequency in code usually implies: A) Poor maintainability
Developer Maintainability
Foundation JAVA Exam
B) Good maintainability, if comments are useful and accurate C) No effect on maintainability D) Poor performance Answer: B Explanation: Helpful comments improve maintainability by clarifying intent and logic. Question 14. When enforcing Java naming conventions, class names should follow: A) camelCase B) PascalCase (UpperCamelCase) C) snake_case
Developer Maintainability
Foundation JAVA Exam
Explanation: Java methods and variables typically use camelCase, starting with a lowercase letter. Question 16. Which of the following is the preferred naming style for Java constants? A) PascalCase B) camelCase C) SCREAMING_SNAKE_CASE D) kebab-case Answer: C Explanation: Constants in Java are written in uppercase with underscores separating words.
Developer Maintainability
Foundation JAVA Exam
Question 17. Java package names should: A) Be written in ALL CAPS B) Use PascalCase C) Be all lowercase D) Use spaces between words Answer: C Explanation: Package names in Java use all lowercase letters to avoid conflicts and ensure consistency. Question 18. Why is it important to use descriptive and unambiguous names for identifiers?
Developer Maintainability
Foundation JAVA Exam
C) Makes code harder to maintain D) Assists in identifying blocks of code Answer: C Explanation: Inconsistent indentation hampers readability and maintainability. Question 20. The Allman and 1TBS styles refer to: A) Java design patterns B) Exception handling techniques C) Bracket placement conventions in code formatting D) Test coverage types Answer: C
Developer Maintainability
Foundation JAVA Exam
Explanation: These are two popular styles for placing curly braces in code blocks. Question 21. Limiting method and line length in code is a best practice because: A) It makes code more difficult to read B) It ensures code is more easily scanned and understood C) It slows down the compiler D) It is required by the JVM Answer: B Explanation: Shorter methods and lines are easier to read and maintain.
Developer Maintainability
Foundation JAVA Exam
B) For public classes, methods, and fields to describe their purpose and usage C) Only in test files D) Never, as they are ignored by the compiler Answer: B Explanation: Javadoc comments are used to document APIs for developers and users. Question 24. Which Javadoc tag is used to describe a method’s input parameter? A) @param B) @return
Developer Maintainability
Foundation JAVA Exam
C) @throws D) @see Answer: A Explanation: @param documents each parameter in a method. Question 25. What makes code ‘self-documenting’? A) Excessive use of comments B) Clear, descriptive names and straightforward structure that explain themselves C) High cyclomatic complexity D) Large class files Answer: B
