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

Learn Data Types and Variables in Ruby MCQ Questions and answers with easy and logical explanations in Ruby Programming. Data Types and Variables in Ruby MCQ question provides all type of technical mcq questions which is important for technical exams, campus exams and other entrance examination. Page-2 section-1

11
What is the result of the expression: 5 / 2 in Ruby?
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Answer & Solution
Answer: Option A
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12
Which of the following is the correct way to declare a constant in Ruby?
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Answer: Option A
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13
Which method is used to check if a variable is nil in Ruby?
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Answer: Option B
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14
What is the method used to check the data type of a variable in Ruby?
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Answer: Option C
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15
What is the output of the expression: "5" + "2" in Ruby?
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Answer & Solution
Answer: Option C
Solution:
Question: What is the output of the expression: "5" + "2" in Ruby?

Explanation:
In Ruby, when you use the "+" operator with strings (text enclosed in double quotes), it performs string concatenation, not mathematical addition.

This means it joins the two strings together.

So, "5" + "2" combines "5" and "2" to create the new string "52".

Therefore, the correct answer is Option C: 52

Important Note: If you wanted to perform mathematical addition, you would need to use numbers without quotes, like 5 + 2, which would result in 7. But in this case, because the inputs are strings, Ruby treats the "+" as a string concatenation operator.
16
What is the method used to check if a variable is defined in Ruby?
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Answer: Option B
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17
What is the correct syntax to declare and initialize a variable in Ruby?
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Answer: Option D
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18
Which of the following is a valid way to declare a variable in Ruby?
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Answer: Option A
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19
What is the data type of the value "Hello, World" in Ruby?
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Answer: Option C
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20
What is the method used to check if a variable is empty in Ruby?
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Answer: Option A
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