Plugins from Zero

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1. What is the purpose of a WordPress plugin?

What is the purpose of a WordPress plugin? Add or modify functionality without editing WordPress core Provide only CSS colors Control the web-server operating system Replace the database

Hint
Identify the WordPress API responsibility before considering implementation details.
2. Where are ordinary WordPress plugins stored by default?

Where are ordinary WordPress plugins stored by default? wp-admin/plugins wp-includes/plugins wp-content/uploads wp-content/plugins

Hint
Identify the WordPress API responsibility before considering implementation details.
3. What lets WordPress recognize a PHP file as a plugin?

What lets WordPress recognize a PHP file as a plugin? A valid plugin header containing Plugin Name A CSS @plugin rule A JSON database A class named WordPressPlugin

Hint
Identify the WordPress API responsibility before considering implementation details.
4. What is the plugin main file?

What is the plugin main file? The PHP file containing the identifying plugin header and bootstrap code The active theme index.php The largest PHP file wp-config.php

Hint
Identify the WordPress API responsibility before considering implementation details.
5. What happens when an administrator activates a plugin?

What happens when an administrator activates a plugin? WordPress marks it active and loads it on subsequent requests WordPress copies it into core The database is recreated Its files become public posts

Hint
Identify the WordPress API responsibility before considering implementation details.
6. Does deactivating a plugin normally delete its files and data?

Does deactivating a plugin normally delete its files and data? It deletes WordPress core It removes the database server No, it stops ordinary loading but should usually preserve recoverable data Yes, always

Hint
Identify the WordPress API responsibility before considering implementation details.
7. When should permanent plugin cleanup normally occur?

When should permanent plugin cleanup normally occur? During an explicit uninstall routine On every deactivation without warning When a theme changes On every page request

Hint
Identify the WordPress API responsibility before considering implementation details.
8. What is register_activation_hook() used for?

What is register_activation_hook() used for? Register code to run when the plugin is activated Load the theme header Register a frontend action Create an AJAX request

Hint
Identify the WordPress API responsibility before considering implementation details.
9. What is register_deactivation_hook() used for?

What is register_deactivation_hook() used for? Delete every plugin option Register code to run when the plugin is deactivated Register a post type on init Render an admin page

Hint
Identify the WordPress API responsibility before considering implementation details.
10. How do plugins usually integrate with WordPress behavior?

How do plugins usually integrate with WordPress behavior? By editing core files By registering callbacks on actions and filters By changing DNS records By replacing PHP

Hint
Identify the WordPress API responsibility before considering implementation details.
11. Why should plugin functions and identifiers use a unique prefix or namespace?

Why should plugin functions and identifiers use a unique prefix or namespace? To hide code from PHP To avoid collisions with WordPress and other extensions To bypass authorization To make them run twice

Hint
Identify the WordPress API responsibility before considering implementation details.
12. Why might a plugin file check whether ABSPATH is defined?

Why might a plugin file check whether ABSPATH is defined? To activate itself To register CSS To stop direct execution outside the WordPress bootstrap To locate the database password

Hint
Identify the WordPress API responsibility before considering implementation details.
13. Why use plugin path and URL helper functions rather than hard-coded installation paths?

Why use plugin path and URL helper functions rather than hard-coded installation paths? Plugins run only on localhost WordPress installations and directories can vary URLs are always secret PHP cannot read strings

Hint
Identify the WordPress API responsibility before considering implementation details.
14. How should a plugin add frontend JavaScript or CSS?

How should a plugin add frontend JavaScript or CSS? Edit the active theme Print every asset in wp-config.php Enqueue it on the appropriate WordPress hook Store it as a post title

Hint
Identify the WordPress API responsibility before considering implementation details.
15. Which action is commonly used to register plugin administration menu pages?

Which action is commonly used to register plugin administration menu pages? wp_footer admin_menu template_redirect the_content

Hint
Identify the WordPress API responsibility before considering implementation details.
16. Where should plugin configuration usually be managed?

Where should plugin configuration usually be managed? Through an authorized settings interface and WordPress APIs In post titles By asking users to edit core Inside public JavaScript secrets

Hint
Identify the WordPress API responsibility before considering implementation details.
17. What is a plugin text domain used for?

What is a plugin text domain used for? Associating translatable strings with the plugin translation catalogue Authorizing users Registering routes Creating database tables

Hint
Identify the WordPress API responsibility before considering implementation details.
18. How should a plugin handle a missing required dependency?

How should a plugin handle a missing required dependency? Delete the site options Cause a public fatal error Fail safely and show an actionable administration notice Edit the dependency

Hint
Identify the WordPress API responsibility before considering implementation details.
19. Why should plugin updates preserve backward compatibility or provide migrations?

Why should plugin updates preserve backward compatibility or provide migrations? Only themes have versions Existing sites already contain data and integrations created by older versions Updates erase PHP automatically WordPress never reloads plugins

Hint
Identify the WordPress API responsibility before considering implementation details.
20. Which feature most clearly belongs in a plugin?

Which feature most clearly belongs in a plugin? A reusable custom content workflow that should survive theme changes A decorative border A presentation-only font choice A theme template layout

Hint
Identify the WordPress API responsibility before considering implementation details.

1. What is the purpose of a WordPress plugin?

2. Where are ordinary WordPress plugins stored by default?

3. What lets WordPress recognize a PHP file as a plugin?

4. What is the plugin main file?

5. What happens when an administrator activates a plugin?

6. Does deactivating a plugin normally delete its files and data?

7. When should permanent plugin cleanup normally occur?

8. What is register_activation_hook() used for?

9. What is register_deactivation_hook() used for?

10. How do plugins usually integrate with WordPress behavior?

11. Why should plugin functions and identifiers use a unique prefix or namespace?

12. Why might a plugin file check whether ABSPATH is defined?

13. Why use plugin path and URL helper functions rather than hard-coded installation paths?

14. How should a plugin add frontend JavaScript or CSS?

15. Which action is commonly used to register plugin administration menu pages?

16. Where should plugin configuration usually be managed?

17. What is a plugin text domain used for?

18. How should a plugin handle a missing required dependency?

19. Why should plugin updates preserve backward compatibility or provide migrations?

20. Which feature most clearly belongs in a plugin?