Ruby Programming Questions and Answers - Until Loop

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

1. The complement of while loop is until loop.
a) True
b) False
View Answer

Answer: a
Explanation: The until loop is sort of like backward while.

2. What is the output of the given code?

counter = 1
until counter > 10
  puts counter
counter+=1 
  end

a) 1 2 3 4 5 6 7 8 9 10
b) 11 12 13 14 … infinite loop
c) 0 1 2 3 4 5 6 7 8 9
d) None of the mentioned
View Answer

Answer: a
Explanation: Until the condition is false continue looping.

Output:
1
2
3
4
5
6
7
8
9
10

3. What is the output of the given code?

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counter = 0
until counter >= 10
  puts counter
counter+=1 
  end

a) 1 2 3 4 5 6 7 8 9 10
b) 11 12 13 14 … infinite loop
c) 0 1 2 3 4 5 6 7 8 9
d) None of the mentioned
View Answer

Answer: c
Explanation: Until the condition is false continue looping and here 10 will not be included because condition becomes true when counter is 10.

Output:
0
1
2
3
4
5
6
7
8
9

4. What is the output of the given code?

i = 3
while i > 0 do
  puts i
  i -= 1
end
 
j = 3
until j == 0 do
  puts j
  j -= 1
end

a) 1 2 3 1 2 3
b) 3 2 1 3 2 1
c) 0 1 2 3 4 5 6 7 8 9
d) None of the mentioned
View Answer

Answer: c
Explanation: When it comes out of the while loop the until loop starts executing.

Output:
3
2
1
3
2
1

5. What is the output of the given code?

a="hungry"
until !a
puts "hungry"
a=!a
end

a) hungry
b) Nil
c) Error
d) None of the mentioned
View Answer

Answer: a
Explanation: Until the condition is not met execute the loop.

Output:
hungry

6. What is the output of the given code?

m= 8
loop do
    m += 2
    puts m
    break if m == 16
end

a) 10 12 14 16
b) Nil
c) Error
d) None of the mentioned
View Answer

Answer: a
Explanation: Execute the loop till the condition is met.

Output:
10
12
14
16

7. What is the output of the given code?

m=0
loop do
    print "ruby"
    m+=1
    break if m==5
end

a) rubyrubyrubyrubyrubyruby
b) rubyrubyrubyrubyruby
c) Error
d) None of the mentioned
View Answer

Answer: b
Explanation: Execute the loop till m!=5 and then break when m=5.

Output:
rubyrubyrubyrubyruby

8. What is the output of the given code?

m=0
loop do
    puts m*10
    m+=1
    break if m==5
end

a) 0 10 20 30 40
b) 10 20 30 40 50
c) Error
d) None of the mentioned
View Answer

Answer: a
Explanation: Execute the loop till m!=5 and then print m*10.

Output:
0
10
20
30
40

9. What is the output of the given code?

m=0
loop do
    puts 101
    m+=1
    break if m==5
end

a) 101 101 101 101 101
b) 10 20 30 40 50
c) Error
d) None of the mentioned
View Answer

Answer: a
Explanation: Execute the loop till m!=5 and then print 101 five times.

Output:
101
101
101
101
101

10. What is the output of the given code?

m=5
loop do
    m-=1
    break if m==0
end

a) 1 2 3 4 5
b) 10 20 30 40 50
c) Error
d) Nil
View Answer

Answer: d
Explanation: There is no print statement so the loop will execute 5 times and will not print anything.

Output:
nil

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.

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