Ruby Programming Questions and Answers – While Loop

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

1. While loop checks the condition and the loop keeps on running till the condition is true, it stops when the condition becomes false.
a) True
b) False
View Answer

2. What is the output of the given code?

counter = 1
while counter < 11
  puts counter
  counter = counter + 1
end

a) Prints the number from 1 to 10
b) Prints the number from 1 to 11
c) Prints the number from 2 to 10
d) Infinite loop
View Answer

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

3. What is the output of the given code?

counter = true
while counter !=false
  puts counter
end

a) True
b) False
c) Syntax error
d) Infinite loop
View Answer

Output:
true
true
...Infinite loop

4. What is the output of the given code?

i = 0
while i < 5
  puts i
   i=(i+1)**2
end

a) 1 2 3 4 5
b) 0 1 4
c) 0 1
d) 1 4
View Answer

Output:
0
1
4

5. What is the output of the given code?

a=5
b=15
while a&&b
puts a+b
end

a) 5..15
b) 20
c) Infinite loop
d) 5 15
View Answer

Output:
20
20
....infinite loop

6. What is the output of the given code?

a=5
b=15
while b>a
puts a*(b-a)
while a>b
  a+=1
  b-=1
end
end

a) 5..15
b) 50
c) Infinite loop
d) 5 50
View Answer

Output:
50
50
....infinite loop

7. What is the output of the given code?

i = 3
while i > 0 do
  print i
  i -= 1
end

a) 3
b) 321
c) Infinite loop
d) 3 2 1 0
View Answer

Output:
321

8. What is the output of the given code?

i = 50
while i > 25 do
  print 50/i
  i -= 1
end

a) 50..25
b) 50..1
c) Infinite loop
d) 1111111111111111111111111
View Answer

Output:
1111111111111111111111111

9. What is the output of the given code?

a = 5
b=10
while a<b do
  puts a*b
  a+=2
  b-=2
  end

a) 5 10
b) 50 56
c) Infinite loop
d) 5 6 7 8 9 10
View Answer

Output:
50
56