Best Practices and Code Conventions in Ruby MCQ question and answer with solution

31

What is the recommended line length limit for Ruby code according to most style guides?

A) No fixed limit B) 120 characters C) 80 characters D) 100 characters

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Answer & Solution

Answer: Option D

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32

Which Ruby tool is commonly used for automated testing to ensure code quality and reliability?

A) RSpec B) Cucumber C) MiniTest D) RuboCop

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Answer & Solution

Answer: Option C

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33

What is the purpose of using version control systems (VCS) like Git in Ruby development?

A) Improve code performance B) Track changes to codebase and collaborate with other developers C) Document the entire codebase D) None of the above

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Answer & Solution

Answer: Option B

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34

What is the significance of following the "Rule of Three" in Ruby programming?

A) Test code thoroughly in at least three different environments to ensure reliability B) Implement the same feature in at least three different ways to ensure robustness C) Refactor code after duplicating it three times to avoid redundancy D) Write code in groups of three lines to improve readability

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Answer & Solution

Answer: Option C

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35

What is the purpose of using snake_case for method and variable names in Ruby?

A) To make the code more challenging to read B) To indicate private methods and variables C) To emphasize the importance of the code D) To improve readability and maintain consistency

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Answer & Solution

Answer: Option D

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36

Which principle in Ruby programming suggests that classes should have a single, well-defined responsibility?

A) Single Responsibility Principle (SRP) B) Don't Repeat Yourself (DRY) C) Keep It Simple, Stupid (KISS) D) You Aren't Gonna Need It (YAGNI)

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Answer & Solution

Answer: Option A

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37

Which Ruby convention is commonly used for naming methods that modify an object's state?

A) Method names ending with mod B) Method names starting with modify_ C) Method names starting with set_ D) Method names ending with !

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Answer & Solution

Answer: Option D

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38

What does the term "polymorphism" mean in the context of Ruby programming?

A) The ability of objects to be treated as instances of their parent class B) The practice of defining multiple methods with the same name but different implementations C) The ability of objects to respond to the same method call in different ways D) The practice of overriding inherited methods with custom behavior

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Answer & Solution

Answer: Option C

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39

Which Ruby convention is commonly used for naming predicate methods that return a boolean value?

A) Method names starting with get_ B) Method names ending with ? C) Method names ending with bool D) None of the above

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Answer & Solution

Answer: Option B

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40

Which Ruby convention is commonly used for naming files that contain Ruby code?

A) snake_case B) camelCase C) UPPER_SNAKE_CASE D) kebab-case

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Answer & Solution

Answer: Option A

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Best Practices and Code Conventions in Ruby MCQ question and answer with solution | Ruby Programming MCQs