1. What is the output of given code?
counter=1
if counter<=5
puts (counter)
counter=counter+1
else
puts(counter)
counter=counter-1
end
a) 1, 2
b) 1,2,3,4,5
c) 1 2 1
d) 1
2
Explanation: Value of counter is printed and then incremented.
Output:
1
2
2. What is the output of given code?
#counter=1
if counter<=5
puts (counter)
counter=counter+1
else
puts(counter)
counter=counter-1
end
a) Undefined local variable counter
b) 1,2,3,4,5
c) 1 2 1
d) 1
2
Explanation: Counter value must not be commented.
Output:
Undefined local variable counter
3. It is necessary that always if should come with else block?
a) True
b) False
Explanation: Not necessary, if can execute alone.
4. Syntax for unless conditional statement is
unless conditional [then]
code
else
code
end
a) True
b) False
Explanation: Executes code if condition is false. If the condition is true, code specified in the else clause is executed.
5. What is the output of the given code?
x=3
unless x>2
puts "x is less than 2"
else
puts "x is greater than 2"
end
a) x is greater than 2
b) x is less than 2
c) 3
d) None of the mentioned
Explanation: The unless conditional statement is true so the unless clause is not executed.
6. What is the output of the given code?
var = 1
print "1 -- Value is set\n" if var
print "2 -- Value is set\n" unless var
var = false
print "3 -- Value is set\n" unless var
a) 1–Value is set
b) 2–Value is set
c) 1–Value is set
2–Value is set
d) 1–Value is set
3–Value is set
Explanation: if condition is evaluated to true so it is executed and the second unless condition is evaluated to false so it is also executed.
Output:
1--Value is set
3--Value is set
7. What is the output of the given code?
hungry=false
unless hungry
print "Not hungry"
else
print "Hungry"
end
a) Not hungry
b) Hungry
c) Syntax error
d) None of the mentioned
Explanation: As hungry is initialized to false hence the unless condition is executed.
8. The following syntax is also used for unless conditional statement.
code unless conditional
a) True
b) False
Explanation: The unless condition must be false in order to execute the code.
9. What is the output of the given code?
counter=12
unless counter
print counter+1
else
print counter+2
end
a) 13
b) 14
c) 15
d) None of the mentioned
Explanation: Counter is assigned the value 1, so the unless conditional statement is true and hence it is not executed.
10. What is the output of the given code?
unless true && false
print "false"
else
print "ruby"
end
a) True
b) False
c) Nil
d) Syntax error
Explanation: true && false will evaluate to false so unless block will get executed.