What does isset() do in PHP?

• Declares a variable
• Checks if a variable is set
• Compares values
• Defines a constant

Answer explanation

Checks if a variable is set and not null.

Which element is used to create a button in HTML?

• <btn>
• <button>
• <submit>
• <input type='text'>

Answer explanation

The correct element is <button>.

What PHP function is used to remove whitespace?

• remove_spaces()
• strip()
• escape()
• trim()

Answer explanation

trim() removes whitespace from both ends of a string.

Which superglobal is used to retrieve form data?

• $_GET
• $_POST
• $_FORM
• $_DATA

Answer explanation

$_POST is used for form submission.

How does PHP typically check if a button was clicked?

• $_CLICK
• isset($_POST['button_name'])
• onClick()
• button_clicked()

Answer explanation

Using isset($_POST['button_name']) is standard practice.

What is the purpose of .htaccess?

• Style HTML
• Handle sessions
• Control web server settings
• Redirect to login

Answer explanation

.htaccess is used for server-level configurations.

Which PHP tag starts a block of code?

• <php>
• <?php ?>
• <script>
• <code>

Answer explanation

<?php ?> is the correct PHP opening tag.

What directive is used for redirecting in .htaccess?

• GoTo
• Redirect
• Transfer
• MoveTo

Answer explanation

Redirect is used in .htaccess for redirections.

Which HTML tag is used to create links?

• <nav>
• <a>
• <link>
• <href>

Answer explanation

<a> is used to create hyperlinks.

What does the ucfirst() function do?

• Makes string lowercase
• Capitalizes first letter
• Encrypts text
• Reverses string

Answer explanation

ucfirst() capitalizes the first character of a string.