Arrays, Hashes and Strings in Ruby MCQ question and answer with solution

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Current Affairs Interview Blog

What does the `include?` method do when used with strings in Ruby?

A) Checks if a substring exists in the string B) Checks if a character exists in the string C) Checks if the string includes another string D) Error

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Answer & Solution

Answer: Option C

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In Ruby, what does the `capitalize` method do when used with strings?

A) Converts the first character to uppercase B) Converts the entire string to uppercase C) Converts the first character to lowercase D) Converts the entire string to lowercase

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Answer & Solution

Answer: Option A

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In Ruby, which method is used to concatenate two strings?

A) concat B) join C) plus D) +

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Answer & Solution

Answer: Option D

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What is the result of the expression `"hello".length` in Ruby?

A) 5 B) 6 C) Error D) "hello"

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Answer & Solution

Answer: Option A

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What does the `chomp` method do when used with strings in Ruby?

A) Removes whitespace from the beginning and end B) Removes newline characters from the end C) Removes whitespace from the end D) Removes newline characters from the beginning

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Answer & Solution

Answer: Option B

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Which method in Ruby is used to add an element to the end of an array?

A) push(element) B) add(element) C) append(element) D) insert_end(element)

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Answer & Solution

Answer: Option A

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What does the pop method do when called on an array in Ruby?

A) Removes the first element of the array B) Removes the last element of the array C) Returns a new array with the last element removed D) Inserts an element at a specified index

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Answer & Solution

Answer: Option B

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In Ruby, which symbol is used to access the value associated with a key in a hash?

A) : B) @ C) $ D) %

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Answer & Solution

Answer: Option A

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What method in Ruby is used to join the elements of an array into a single string?

A) join(separator) B) concat(separator) C) merge(separator) D) combine(separator)

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Answer & Solution

Answer: Option A

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Which of the following methods is used to remove a key-value pair from a hash in Ruby?

A) delete(key) B) remove(key) C) erase(key) D) exclude(key)

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Answer & Solution

Answer: Option A

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Arrays, Hashes and Strings in Ruby MCQ question and answer with solution | Ruby Programming MCQs