Ruby MCQ On Loops

This section focuses on "Loops" in Ruby. These Multiple Choice Questions (MCQ) should be practiced to improve the Ruby skills required for various interviews (campus interviews, walk-in interviews, company interviews), placements, entrance exams and other competitive examinations.

1. Which of the following is not a type of loop in ruby?

A. For Loop
B. Foreach Loop
C. Until Loop
D. While Loop

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2. What is true about Until loop?

A. Executes code while conditional is true
B. In until loop increment is not required
C. Executes code while conditional is false
D. None of the above

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3. What is true about while loop?

A. Executes code while conditional is true
B. In while loop increment is not required
C. Executes code while conditional is false
D. None of the above

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4. What is the use of break statement?

A. Terminates the most External loop.
B. Terminates all loop.
C. Terminates the program.
D. Terminates the most internal loop.

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5. Which statement is used to Jumps to the next iteration of the most internal loop?

A. break
B. next
C. redo
D. retry

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6. Which statement is used to Restarts this iteration of the most internal loop, without checking loop condition?

A. break
B. next
C. redo
D. retry

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7. Which statement is used to restarts the invocation of the iterator call?

A. break
B. next
C. redo
D. retry

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8. What does the 1..5 indicate?

A. Exclusive range
B. Both inclusive and exclusive range
C. Inclusive range
D. None of the above

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9. What does end represent?

A. keyword represents the ending of loop
B. keyword represents the start of loop
C. keyword represents the start and ending of loop
D. keyword represents the infinite loop

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10. Which of the following is Exit Controlled loop?

A. do..while
B. For
C. Until
D. While

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

for num in 1...5
  puts num
end

A. 1 2 3 4
B. 1 2 3 4 5
C. 0 1 2 3 4
D. 0 1 2 3 4 5

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

for i in 1...3  
  for j in 1..3
  puts j
  end
end

A. 1 2 1 2
B. 0 1 2 0 1 2
C. 1 2 3 1 2 3
D. 1 2 3 1 2

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

for num in 1...4

   puts num*num

end

A. 0 1 4 9
B. 1 4 9 16
C. 0 1 2 3
D. 1 2 3

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

i=1
for i in 6..10
puts i**2
end

A. 36 49 64 81
B. 49 64 81 100
C. 49 64 81
D. 36 49 64 81 100

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

for i in 1..5 && j in 5..10
puts i+j
end

A. 6 8 10 12 14 16
B. Syntax Error
C. 6 8 10 12 14
D. Type Error

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

counter = 1
while counter < 5
  puts counter
  counter = counter + 1
end

A. Prints the number from 1 to 4
B. Prints the number from 1 to 5
C. Prints the number from 2 to 5
D. Prints the number from 2 to 4

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

counter = true
while counter !=false
  puts counter
end

A. TRUE
B. FALSE
C. Syntax Error
D. Infinite Loop

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

while a&&b
puts a
end

A. TRUE
B. FALSE
C. Syntax Error
D. Name Error

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

a=1
b=1
while a&&b
puts a+b
end

A. 2
B. 2 2 2 2 2
C. Infinite Loop
D. Syntax Error

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

i = 4
while i > 0 do
  print i
  i -= 1
end

A. 321
B. 3210
C. 4321
D. 43210

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