PHP Aptitude Test - Sanfoundry

This set of PHP Questions and Answers for Aptitude test focuses on “Functions – 4”.

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

```
<?php
```
```
    function A1($x)
```
```
    {
```
```
        switch($x)
```
```
        {
```
```
        case 1: 
```

            //this statement is the same as if($x == 1)

            echo 'Case 1 was executed.';

```
            break;
```
```
        case 2: 
```

            //this statement is the same as if($x == 2)

            echo 'Case 2 was executed.';

```
            break;
```
```
        case 3: 
```

            //this statement is the same as if($x == 3)

            echo 'Case 3 was executed.';

```
            break;
```
```
        case 4: 
```

            //this statement is the same as if($x == 4)

            echo 'Case 4 was executed.';

```
            break;
```
```
        default: 
```

            //this statement is the same as if $x does not equal the other conditions

            echo 'Default was executed.';

```
            break;
```
```
 
```
```
        }
```
```
    }
```
```
    A1(9);
```
```
?>
```

a) Case 1 was executed
b) Case 2 was executed
c) Default was executed
d) Case 4 was executed
View Answer

Answer: d
Explanation: The switch statement is executed with $x = 9.

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

```
<?php
```
```
    function uppercase($string)
```
```
    {
```
```
        echo ucwords($string);
```
```
    }
```
```
    $wow = "uppercase";
```
```
    $wow("Time to live king size");
```
```
?>
```

a) TIME TO LIVE KING SIZE
b) Time to live king size
c) Uppercase
d) Time To Live King Size
View Answer

Answer: d
Explanation: The ucwords() function converts the first character of each word in a string to uppercase.

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

```
<?php
```
```
    function TV($string)
```
```
    {
```

        echo "my favourite TV show is ".$string;

```
        function b()
```
```
        {
```

            echo " I am here to spoil this code";

```
        }
```
```
    }
```
```
    b();
```
```
?>
```

a) I am here to spoil this code
b) Error
c) My favourite TV show isI am here to spoil this code
d) None of the mentioned
View Answer

Answer: b
Explanation: b is undeclared if TV() is not called first.

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

```
<?php
```
```
    function TV($string)
```
```
    {
```

        echo "my favourite TV show is ".$string;

```
        function b()
```
```
        {
```

            echo " I am here to spoil this code";

```
        }
```
```
    }
```
```
    function b()
```
```
    {
```

        echo " I am here to spoil this code";

```
    }
```
```
    b();
```
```
?>
```

a) I am here to spoil this code
b) Error
c) my favourite TV show isI am here to spoil this code
d) None of the mentioned
View Answer

Answer: a
Explanation: This one works because b is declared independent of TV() also.

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

```
<?php
```
```
    function TV($string)
```
```
    {
```

        echo "my favourite TV show is ".$string;

```
        function b()
```
```
        {
```

            echo " I am here to spoil this code";

```
        }
```
```
    }
```
```
    function b()
```
```
    {
```

        echo " I am here to spoil this code";

```
    }
```
```
    b();
```
```
    TV("Sherlock");
```
```
?>
```

a) I am here to spoil this code
b) Error
c) My favourite TV show isI am here to spoil this code
d) None of the mentioned
View Answer

Answer: b
Explanation: Function b is declared twice.

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

```
<?php
```
```
    function TV($string)
```
```
    {
```

        echo "my favourite TV show is ".$string;

```
        function b()
```
```
        {
```

            echo " I am here to spoil this code";

```
        }
```
```
    }
```
```
    a("Sherlock");
```
```
    b();
```
```
?>
```

a) I am here to spoil this code
b) Error
c) my favourite TV show is SherlockI am here to spoil this code
d) None of the mentioned
View Answer

Answer: c
Explanation: b is declared as TV() is executed first.

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

```
<?php
```
```
    function calc($num1, $num2)
```
```
    {
```
```
        $total = $num1 * $num2; 
```
```
    }
```
```
    $result = calc(42, 0);
```
```
    echo $result;    
```
```
?>
```

a) Error
b) 0
c) 42
d) 84
View Answer

Answer: a
Explanation: Function does not return anything.

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

```
<?php
```
```
    function calc($num1, $num2)
```
```
    {
```
```
        $total = $num1 * $num2;
```
```
        return $total; 
```
```
    }
```
```
    $result = calc(42, 0);
```
```
    echo $result;    
```
```
?>
```

a) Error
b) 0
c) 42
d) 84
View Answer

Answer: b
Explanation: Function returns $total.

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

```
<?php
```
```
    $var = 10;
```
```
    function one()
```
```
    {
```
```
        echo $var;
```
```
    }
```
```
    one();
```
```
?>
```

a) Error
b) 10
c) No Output
d) None of the Mentioned
View Answer

Answer: c
Explanation: $var is not global and hence is not available for one().

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

```
<?php
```
```
    function mine($m)
```
```
    {
```
```
        if ($m < 0)
```
```
            echo "less than 0";
```
```
        if ($ >= 0)
```
```
            echo "Not True";
```
```
    }
```
```
    mine(0);
```
```
?>
```

a) Less Than 0
b) Not True
c) No Output
d) None of the Mentioned
View Answer

Answer: b
Explanation: Argument is 0.

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