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Operators And Expressions MCQ question and answer with solution | PHP Programming

Learn Operators And Expressions MCQ Questions and answers with easy and logical explanations. Operators And Expressions MCQ in PHP programming provides all type of technical mcq questions which is important for technical exams, cumpus exams and other entrance examination Page-1 section-2

Each section contains 100 MCQs on Operators and Expressions in php .
1
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.
2
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.
3
What will be the output of the following PHP code ? 
<?php
echo 5 * 9 / 3 + 9;
?>
Discuss
Answer & Solution
Answer: Option A
Solution:
Operator precedence order must be followed.
4
What will be the output of the following PHP code ? 
<?php
$i = 0;
$j = 0;
if ($i &&  ($j = $i + 10)) 
{
    echo "true";
}
echo $j;
?>
Discuss
Answer & Solution
Answer: Option B
Solution:
In if condition when the first case is 0 and is an && operation then the second command is not executed.
5
What will be the output of the following PHP code ? 
<?php
$i = 10;
$j = 0;
if ($i || ($j = $i + 10)) 
{
    echo "true";
}
echo $j;
?>
Discuss
Answer & Solution
Answer: Option B
Solution:
In if condition when the first case is 1 and is an || operation then the second command is not executed.
6
What will be the output of the following PHP code ? 
<?php
$i = 1;
if ($i++ && ($i == 1))
    printf("Yesn$i");
else
    printf("Non$i");
?>
Discuss
Answer & Solution
Answer: Option A
Solution:
The first condition returns true and increments but the second condition is false.
7
What will be the output of the following PHP code ? 
<?php
$a = 1; $b = 3;
$d = $a++ + ++$b;
echo $d;
?>
Discuss
Answer & Solution
Answer: Option A
Solution:
Post increment of a is done after expression evaluation.
8
What will be the output of the following PHP code ? 
<?php
$a = 1; $b = 1; $d = 1;
print ++$a + ++$a+$a++; print $a++ + ++$b; print ++$d + $d++ + $a++;
?>
Discuss
Answer & Solution
Answer: Option A
Solution:
Follow the order of post and pre increments.
9
What will be the output of the following PHP code ? 
<?php
$a = 10; $b = 10;
if ($a = 5)
    $b--;
print $a;print $b--;
?>
Discuss
Answer & Solution
Answer: Option B
Solution:
a is set to 5 in the if condition and b is postdecremented in the print statement.
10
What will be the output of the following PHP code ? 
<?php
$i = 0;
$x = $i++; $y = ++$i;
print $x; print $y; 
?>
Discuss
Answer & Solution
Answer: Option A
Solution:
First case i is incremented after setting x to i.