Data Types and Variables in Ruby MCQ question and answer with solution

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Current Affairs Interview Blog

What is the correct way to concatenate two strings in Ruby?

A) str1.concat(str2) B) str1 + str2 C) str1.append(str2) D) str1.combine(str2)

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Answer & Solution

Answer: Option B

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Which method is used to convert a string to uppercase in Ruby?

A) .upcase B) .uppercase C) .to_upper D) .to_uppercase

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Answer & Solution

Answer: Option A

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What is the output of the expression: "5".to_i + 2 in Ruby?

A) 7 B) "52" C) +7 D) Error

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Answer & Solution

Answer: Option A

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What is the correct way to declare a variable in Ruby without assigning a value?

A) var_name B) var_name = nil C) var_name = "" D) None of the above

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Answer & Solution

Answer: Option A

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What is the method used to convert a string to lowercase in Ruby?

A) .downcase B) .to_lower C) .lower D) .to_lowercase

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Answer & Solution

Answer: Option A

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Which of the following is the correct way to declare a variable in Ruby with a default value?

A) var_name = value B) var_name := value C) var_name << value D) var_name => value

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Answer & Solution

Answer: Option A

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What is the method used to check if a variable is numeric in Ruby?

A) .numeric? B) .is_numeric? C) .number? D) .numeric_value?

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Answer & Solution

Answer: Option B

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What is the output of the expression: "10" * 3 in Ruby?

A) "101010" B) 30 C) 1010 D) Error

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Answer & Solution

Answer: Option A

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Which method is used to convert a string to an array of characters in Ruby?

A) .to_chars B) .split C) .to_array D) .chars

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Answer & Solution

Answer: Option D

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What is the method used to check if a variable is of a specific class in Ruby?

A) .is_a? B) .type_of C) .typeof D) .class_of

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Answer & Solution

Answer: Option A

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Data Types and Variables in Ruby MCQ question and answer with solution | Ruby Programming MCQs