Enumerators and Iterators in Ruby MCQ question and answer with solution

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What is the purpose of the lazy method in Ruby enumerators?

A) Converts an enumerator into a hash B) Converts an enumerator into an array C) Delays the execution of operations on an enumerator until they are needed D) Executes operations on an enumerator immediately

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Answer & Solution

Answer: Option C

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What does the slice_before method do in Ruby enumerators?

A) Slices a collection based on a given condition B) Removes elements from a collection before a given condition C) Removes elements from a collection after a given condition D) Splits a collection into slices before elements that satisfy a given condition

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Answer & Solution

Answer: Option D

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What does the one? method do in Ruby enumerators?

A) Checks if exactly one element satisfies a given condition B) Checks if all elements satisfy a given condition C) Checks if any element satisfies a given condition D) Checks if no elements satisfy a given condition

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Answer & Solution

Answer: Option A

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What is the purpose of the each_cons method in Ruby enumerators?

A) Sorts elements in a collection B) Applies a block of code to each element and returns a new collection C) Iterates over each element in a collection D) Iterates over each consecutive sequence of a given size in a collection

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Answer & Solution

Answer: Option D

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What is the purpose of the cycle method in Ruby enumerators?

A) Repeatedly applies a block of code to each element B) Splits a collection into slices before elements that satisfy a given condition C) Iterates over each element in a collection indefinitely D) Checks if any element satisfies a given condition

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Answer & Solution

Answer: Option C

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Which method is used to check if all elements in a collection satisfy a condition in Ruby enumerators?

A) any? B) all? C) one? D) None of the above

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Answer & Solution

Answer: Option B

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What does the take_while method do in Ruby enumerators?

A) Repeatedly applies a block of code to each element B) Checks if any element satisfies a given condition C) Takes elements from a collection until a given condition is met D) Iterates over each element in a collection and applies a block of code to accumulate a value

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Answer & Solution

Answer: Option C

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What is the purpose of the with_index method in Ruby enumerators?

A) Splits a collection into slices before elements that satisfy a given condition B) Repeats the execution of a block of code for each element in a collection C) Checks if any element satisfies a given condition D) Iterates over each element in a collection along with its index

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Answer & Solution

Answer: Option D

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What does the each_slice method do in Ruby enumerators?

A) Iterates over each consecutive sequence of a given size in a collection B) Splits a collection into slices before elements that satisfy a given condition C) Iterates over each element in a collection along with its index D) Checks if any element satisfies a given condition

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Answer & Solution

Answer: Option A

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What does the grep_v method do in Ruby enumerators?

A) Splits a collection into slices before elements that satisfy a given condition B) Iterates over each element in a collection indefinitely C) Combines elements from multiple collections into arrays D) Filters elements in a collection based on a regular expression, excluding matches

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Answer & Solution

Answer: Option D

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Enumerators and Iterators in Ruby MCQ question and answer with solution | Ruby Programming MCQs