Ruby Programming Questions and Answers – String Methods

This set of Ruby Programming Multiple Choice Questions & Answers (MCQs) focuses on “String Methods”.

1. Which of the following is the valid string method?
a) The .length method
b) The .upcase method
c) The .downcase method
d) The .irreverse method
View Answer

2. The .length method is used to check number of characters.
a) True
b) False
View Answer

3. What is the output of the following?

 "Iam learning ruby language".length

a) 26
b) 23
c) 20
d) 18
View Answer

Output:
26

4. What is the output of the following?

 ruby.reverse

a) Error in compilation
b) ybur
c) 4
d) Undefined local variable ruby
View Answer

Output:
undefined local variable or method `ruby' for #<Context:0x7420ac>

5. What will be the output of the following?

"Eric".irreverse

a) Eric
b) cirE
c) undefined method
d) None of the mentioned
View Answer

Output:
undefined method `irreverse' for "eric":String

6. What does the .upcase method do?
a) Convert the string to uppercase
b) Convert only lowercase string to uppercase and vice-versa
c) Convert the string to lowercase
d) None o the mentioned
View Answer

7. What will be the output of the following?

"Ruby".reverse.upcase

a) RUBY
b) ybuR
c) YBUR
d) YBUr
View Answer

Output:
"YBUR"

8. What will be the output of the given code?

"I'am learning Ruby Language".length.reverse.upcase

a) 27
b) egaugnal ybuR gninreal ma’I
c) ERAUGNAL YBUR GNINREAL MA’I
d) Undefined method `reverse’ for 27:Fixnum
View Answer

Output:
undefined method `reverse' for 27:Fixnum

9. What will be the output of the given code?

"I'am learning Ruby Language".reverse.upcase.length

a) 27
b) egaugnal ybuR gninreal ma’I
c) ERAUGNAL YBUR GNINREAL MA’I
d) Undefined method `reverse’ for 27:Fixnum
View Answer

Output:
27

10. The downcase method changes the whole string to smallcase letters.
a) True
b) False
View Answer

11. What will we the output of the given code?

 "I'am Learning RUBY Language".downcase

a) iam learning ruby language
b) i’AM lEARNING ruby lANGUAGE
c) “i’am learning ruby language”
d) None of the mentioned
View Answer

Output:
"i'am learning ruby language"

12. What is the output of given code?

 string="I'am Learning RUBY Language".downcase
    string.upcase

a) Undefined method
b) “I’AM LEARNING RUBY LANGUAGE”
c) I’am Learning RUBY Language
d) None of the mentioned
View Answer

Output:
"I'AM LEARNING RUBY LANGUAGE"

13. What will be the output of the given code?

"Come let's learn.reverse Ruby.length language".upcase

a) nreal s’tel emoC 4 LANGUAGE
b) Undefined error
c) “COME LET’S LEARN.REVERSE RUBY.LENGTH LANGUAGE”
d) None of the above
View Answer

Output:
"COME LET'S LEARN.REVERSE RUBY.LENGTH LANGUAGE"

14. What will we the output of the given code?

I'am Learning RUBY Language.downcase

a) iam learning ruby language
b) i’AM lEARNING ruby lANGUAGE
c) “i’am learning ruby language”
d) unterminated string meets end of file
View Answer

Output:
Unterminated string meets end of file

15. Methods should not be written inside double quotes.
a) True
b) False
View Answer

Sanfoundry Global Education & Learning Series – Ruby Programming.

To practice all areas of Ruby Programming, here is complete set of 1000+ Multiple Choice Questions and Answers.