Ruby Programming Questions and Answers – For Loop

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

1. What is the output of the given code?

for num in 1...5
  puts num
end

a) 1 2 3 4 5
b) 1 2 3 4
c) 2 3 4 5
d) None of the mentioned
View Answer

Output:
1
2
3
4

2. What does the 1…10 indicate?
a) Inclusive range
b) Exclusive range
c) Both inclusive and exclusive range
d) None of the mentioned
View Answer

3. What is the output of the given code?

for num in 1..3
  puts num
  for i in 1..2
  puts num*i
  end
end

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

Output:
1
1
2
2
2
4
3
3
6

4. What is the output of the given code?

m= 0
loop do
    m += 1
    print m
    break if m == 10
end

a) 12345678910
b) 1 2 3 4
c) 2 3 4 5
d) None of the mentioned
View Answer

Output:
12345678910

5. What is the output of the given code?

for num in 1..5
  puts num*num
end

a) 12345678910
b) 1 2 3 4
c) 1 4 9 16 25
d) None of the mentioned
View Answer

Output:
1
4
9
16
25

6. What is the output of the given code?

for num in 1..3
  puts num*num
  m= 0
loop do
    m += 1
    puts m
    break if m == 3
end
end

a) 12345678910
b) 1 1 2 3 4 1 2 3 9 1 2 3
c) 1 4 9 16 25
d) None of the mentioned
View Answer

Output:
1
1
2
3
4
1
2
3
9
1
2
3

7. What is the output of the given code?

loop do
    m += 1
    puts m
    break if m == 3
end

a) Garbage values
b) 1 1 2 3 4 1 2 3 9 1 2 3
c) 1 4 9 16 25
d) None of the mentioned
View Answer

Output:
Garbage values

8. What is the output of the given code?

i=1
for i in 5..10
puts i^2
end

a) 7 4 5 10 11 8
b) 25 36 49 64 81 100
c) 1 4 9 16 25
d) None of the mentioned
View Answer

Output:
25
36
49
64
81
100

9. What does the 1..10 indicate?
a) Inclusive range
b) Exclusive range
c) Both inclusive and exclusive range
d) None of the mentioned
View Answer

10. What is the output of the given code?

i=5
j=10
for i in 5..10 && j in 5..10
puts i**j
end

a) Syntax error
b) 25 36 49 64 81 100
c) 1 4 9 16 25
d) None of the mentioned
View Answer

Output:
syntax error, unexpected keyword_in, expecting keyword_do_cond or ';' or '\n'
for i in 5..10 && j in 5..10 syntax error, unexpected keyword_end, expecting $end

Sanfoundry Global Education & Learning Series – Ruby Programming.

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