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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-4 section-1

31
What will be the output of the following PHP code ? 
<?php
$a = "hello";
if (strlen($a))
    print strlen($a);
else
    print "hi";
?>
Discuss
Answer & Solution
Answer: Option B
Solution:
The function strlen($a) gives the length of the string,5, which is considered true.
32
What will be the output of the following PHP code ? 
<?php
$a = "1";
$b = "0";
if ((int)$a && $b) 
    print"hi";
else 
    print "hello";
?>
Discuss
Answer & Solution
Answer: Option A
Solution:
The expression is evaluated with values contained in the string, even without typecasting.
33
What will be the output of the following PHP code ? 
<?php
$a = "1";
switch ($a)
{
case 1:
    print "hi";
case 2:
    print "hello";
default:
    print "hi1";
}
?>
Discuss
Answer & Solution
Answer: Option A
Solution:
As break is not provided it executes all the cases.
34
What will be the output of the following PHP code ? 
<?php
$a = "2";
switch ($a)
{
case 1:
    print "hi";
case 2:
    print "hello";
    break;
default:
    print "hi1";
}
?>
Discuss
Answer & Solution
Answer: Option B
Solution:
As hello is provided after case2 it breaks the loop.
35
What will be the output of the following PHP code ? 
<?php
$a = "1";
switch($a)
{
case 1:
    break;
    print "hi";
case 2:
    print "hello";
    break;
default:
    print "hi1";
}
?>
Discuss
Answer & Solution
Answer: Option B
Solution:
As break is provided before print statement in case 2 it breaks the loop before printing.
36
What will be the output of the following PHP code ? 
<?php
$a = "1";
$a = 1;
$b = 1;
switch($a)
{
case $a * $b: 
    print "hi";
    break;
case $a / $b:
    print "hello";
    break;
default:
    print "hi1";
}
?>
Discuss
Answer & Solution
Answer: Option B
Solution:
It checks the first case, when it finds it equal it will perform it breaks out.
37
What will be the output of the following PHP code ? 
<?php
$a = 97;
switch(?$a)
{
case "a":
    print "hi";
    break;
case 97:
    print "hello";
    break;
default:
    print "hi1";
}
?>
Discuss
Answer & Solution
Answer: Option D
Solution:
Downcasting does not happen in case,it compares only with its data type.
38
What will be the output of the following PHP code ? 
<?php
$b = 1;
switch($b)
{
case 1.0:
    print "hi";
    break;
case 1:
    print "hello";
    break;
default:
    print "hi1";
}
?>
Discuss
Answer & Solution
Answer: Option A
Solution:
Upcasting does happen in case,it compares it with 1.0 and thus prints hi and exits.
39
What will be the output of the following PHP code ? 
<?php
const $b = 1;
switch($b)
{
case 1:
    print "hi";
    break;
case 1:
    print "hello";
    break;
default:
    print "hi1";
}
?>
Discuss
Answer & Solution
Answer: Option A
Solution:
Constants cannot be used in switch cases.
40
What will be the output of the following PHP code ? 
<?php
$b = 1;
switch(print $b)
{
case 2:
    print "hello";
    break;
case 1:
    print "hi";
    break;
default:
    print "hi1";
}
?>
Discuss
Answer & Solution
Answer: Option B
Solution:
Print returns 1,thus it gives case 1.