Switch - PHP Questions and Answers

This set of PHP Multiple Choice Questions & Answers (MCQs) focuses on “Switch”.

1. 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";
```
```
}
```
```
?>
```

a) hihellohi1
b) hi
c) hihi1
d) hi1
View Answer

Answer: a
Explanation: As break is not provided it executes all the cases.

2. 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";
```
```
}
```
```
?>
```

a) hihellohi1
b) hello
c) hihi1
d) hi1
View Answer

Answer: b
Explanation: As hello is provided after case2 it breaks the loop.

Sanfoundry Certification Contest of the Month is Live. 100+ Subjects. Participate Now!

3. 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";
```
```
}
```
```
?>
```

a) hihellohi1
b) no output
c) hihi1
d) hi1
View Answer

Answer: b
Explanation: As break is provided before print statement in case 2 it breaks the loop before printing.

4. 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";
```
```
}
```
```
?>
```

a) hihellohi1
b) hi
c) hihello
d) hi1
View Answer

Answer: b
Explanation: It checks the first case, when it finds it equal it will perform it breaks out.

5. 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";
```
```
}
```
```
?>
```

a) hihellohi1
b) hi
c) hihello
d) hello
View Answer

Answer: d
Explanation: Downcasting does not happen in case, it compares only with its data type.

6. 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";
```
```
}
```
```
?>
```

a) hihellohi1
b) hi
c) hihello
d) hello
View Answer

Answer: a
Explanation: Upcasting does happen in case, it compares it with 1.0 and thus prints hi and exits.

7. 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";
```
```
}
```
```
?>
```

a) error
b) hi
c) hihello
d) hello
View Answer

Answer: a
Explanation: Constants cannot be used in switch cases.

8. 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";
```
```
}
```
```
?>
```

a) 1hello
b) 1hi
c) 1hi1
d) error
View Answer

Answer: b
Explanation: Print returns 1, thus it gives case 1.

9. What will be the output of the following PHP code?

```
<?php
```
```
switch($b)
```
```
{
```
```
case 2:
```
```
    print "hello";
```
```
    break;
```
```
case 1:
```
```
    print "hi";
```
```
    break;
```
```
}
```
```
?>
```

a) hello
b) hi
c) no output
d) error
View Answer

Answer: c
Explanation: If that case does not exist then it searches for default and on not finding it does nothing.

10. What will be the output of the following PHP code?

```
<?php
```
```
switch($b)
```
```
{
```
```
case 2:
```
```
    print "hello";
```
```
    break;
```
```
case b:
```
```
    print "hi";
```
```
    break;
```
```
}
```
```
?>
```

a) hello
b) hi
c) no output
d) error
View Answer

Answer: c
Explanation: Case cannot be defined by a variable.

Sanfoundry Global Education & Learning Series – PHP Programming.

To practice all areas of PHP for Campus Interviews, here is complete set of 1000+ Multiple Choice Questions and Answers on PHP.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

« Prev - PHP Coding Questions and Answers – If-Else-If – 3

» Next - PHP Multiple Choice Questions – While Loops

Related Posts:

Recommended Articles: