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Control Structures(Loop In PHP) MCQ question and answer with solution | PHP Programming

Learn Control Structures(Loop In PHP) MCQ Questions and answers with easy and logical explanations. Control Structures(Loop In PHP) MCQ in PHP programming provides all type of technical mcq questions which is important for technical exams, cumpus exams and other entrance examination Page-6 section-1

51
What will be the output of the following PHP code ? 
<?php
$i = "";
while ($i = 10)
{   
    print "hi";
}
print "hello";
?>
Discuss
Answer & Solution
Answer: Option B
Solution:
While condition always gives 1.
52
What will be the output of the following PHP code ? 
<?php
$i = 5;
while (--$i > 0)
{   
    $i++; print $i; print "hello";
}
?>
Discuss
Answer & Solution
Answer: Option A
Solution:
i is decremented in the first while execution and then continuously incremented back.
53
What will be the output of the following PHP code ? 
<?php
$i = 5;
while (--$i > 0 && ++$i)
{   
    print $i;
}
?>
Discuss
Answer & Solution
Answer: Option B
Solution:
As it is && operator it is being incremented and decremented continuously.
54
What will be the output of the following PHP code ? 
<?php
$i = 5;
while (--$i > 0 || ++$i)
{   
    print $i;
}
?>
Discuss
Answer & Solution
Answer: Option A
Solution:
As it is || operator the second expression is not evaluated till i becomes 1 then it goes into a loop.
55
What will be the output of the following PHP code ? 
<?phpspan>
$i = 0;
while(?++$i || --$i)
{   
    print $i;
}
?>
Discuss
Answer & Solution
Answer: Option A
Solution:
As it is || operator the second expression is not evaluated and i is always incremented, in the first case to 1.
56
What will be the output of the following PHP code ? 
<?php
$i = 0;
while (++$i && --$i)
{   
    print $i;
}
?>
Discuss
Answer & Solution
Answer: Option C
Solution:
The first condition itself fails thus the loop exists.
57
What will be the output of the following PHP code ? 
<?php
$i = 0;
while ((--$i > ++$i) - 1)
{   
    print $i;
}
?>
Discuss
Answer & Solution
Answer: Option A
Solution:
(–$i > ++$i) evaluates to 0 but -1 makes it enters the loop and prints i.
58
What will be the output of the following PHP code ? 
<?php
$i = 2;
while (++$i)
{   
    while ($i --> 0)
    print $i;
}
?>
Discuss
Answer & Solution
Answer: Option A
Solution:
The loop ends when i becomes 0.
59
What will be the output of the following PHP code ? 
<?php
$i = 2;
while (++$i)
{   
    while (--$i > 0)
    print $i;
}
?>
Discuss
Answer & Solution
Answer: Option D
Solution:
The loop never ends as i is always incremented and then decremented.
60
What will be the output of the following PHP code ? 
<?php
$i = 0;
for ($i)
{
    print $i;
}
?>
Discuss
Answer & Solution
Answer: Option D
Solution:
Wrong syntax for for loop.