Blocks and Procs in Ruby MCQ question and answer with solution

21

In Ruby, what is a closure?

A) A function that accepts another function as an argument B) A function that returns another function C) A function that captures the state of its surrounding scope D) A function that is defined within another function

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Answer & Solution

Answer: Option C

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22

What is the purpose of the call method in Ruby procs and lambdas?

A) To return the value of the proc or lambda B) To execute the code contained within the proc or lambda C) Both A and B D) None of the above

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Answer & Solution

Answer: Option B

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23

What does the lambda keyword return in Ruby?

A) A Block object B) A Method object C) A Proc object D) A Lambda object

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Answer & Solution

Answer: Option C

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24

Which of the following is true about the stability of variables within a block in Ruby?

A) Variables defined outside the block can be modified within the block B) Variables defined inside the block can be modified outside the block C) Variables defined within the block cannot be modified inside the block D) Variables defined within the block cannot be modified outside the block

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Answer & Solution

Answer: Option D

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25

What is the purpose of using the next keyword within a block in Ruby?

A) To skip the rest of the block and move to the next iteration B) To exit the block and return to the caller C) To execute the block with different parameters D) None of the above

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Answer & Solution

Answer: Option A

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26

In Ruby, what is the purpose of the -> (stabby lambda) syntax?

A) To define a proc B) To define a method C) To define a block of code D) To define a lambda function

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Answer & Solution

Answer: Option D

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27

What does the arity method return for a proc or lambda in Ruby?

A) The number of optional arguments for the proc or lambda B) The total number of arguments for the proc or lambda C) The number of required arguments for the proc or lambda D) None of the above

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Answer & Solution

Answer: Option C

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Blocks and Procs in Ruby MCQ question and answer with solution | Ruby Programming MCQs