Full WordPress Developer Interview

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Full WordPress Developer Interview

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1. Why should plugin strings use a consistent text domain?

Why should plugin strings use a consistent text domain? To register scripts So translation tools can associate strings with the plugin To namespace database tables To authorize REST requests

Hint
It is part of internationalization calls.
2. Why centralize or structure hook registration?

Why centralize or structure hook registration? Callbacks need no names Lifecycle wiring becomes discoverable and avoids accidental duplicates Priorities disappear Hooks run faster automatically

Hint
Choose the solution with the clearest boundary and safest lifecycle behavior.
3. What does the Content-Type header describe?

What does the Content-Type header describe? The browser window size The user role The database engine The media type of the message body

Hint
Focus on what crosses the client/server or local/remote boundary.
4. Which endpoint receives traditional WordPress AJAX requests?

Which endpoint receives traditional WordPress AJAX requests? wp-json/ajax wp-admin/admin-ajax.php index.html wp-content/ajax.php

Hint
Consider lifecycle, authorization, failure and long-term maintenance.
5. Which value is a JavaScript string?

Which value is a JavaScript string? 42 true 'WordPress' null

Hint
Identify what the command or language feature is responsible for.
6. What rule applies to an id value in one HTML document?

What rule applies to an id value in one HTML document? It can only appear on headings It must equal the class value It must be a number It should be unique

Hint
Choose the definition or behavior that best matches the web standard.
7. Which functions read and update post metadata?

Which functions read and update post metadata? the_title() and the_content() get_option() and update_option() only get_post_meta() and update_post_meta() register_post_type() and register_taxonomy()

Hint
Identify the data-model or security responsibility before choosing the API.
8. What does git push do?

What does git push do? Runs WordPress updates Copies uncommitted files directly Sends local commits and reference updates to a remote repository Creates a local branch only

Hint
Focus on what crosses the client/server or local/remote boundary.
9. Why should plugin updates preserve backward compatibility or provide migrations?

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

Hint
Identify the WordPress API responsibility before considering implementation details.
10. What is an HTTP request header?

What is an HTTP request header? A database row Metadata sent with a request A PHP class name The visible page heading

Hint
Focus on what crosses the client/server or local/remote boundary.
11. What does the_post_thumbnail() display?

What does the_post_thumbnail() display? The current post featured image when available The site icon only A CSS background rule Every Media Library image

Hint
Identify the role of the WordPress function or extension point.
12. What is the main role of wp-admin?

What is the main role of wp-admin? Store database tables Contain the active child theme only Contain WordPress administration core files Store media uploads

Hint
Place the concept in the WordPress request, content, or permission model.
13. What is an object?

What is an object? A WordPress URL An instance of a class A PHP source comment A SQL database

Hint
Focus on the responsibility of the language feature rather than memorizing punctuation.
14. Which task is normally associated with the Editor role?

Which task is normally associated with the Editor role? Installing WordPress core on the server Editing wp-config.php Managing the MySQL service Managing and publishing content from multiple authors

Hint
Start with the everyday meaning of the WordPress term.
15. What does order normally specify?

What does order normally specify? The number of results The database connection Ascending or descending result direction The selected post type

Hint
Identify the WordPress API responsibility before considering implementation details.
16. Can the same class be used on several HTML elements?

Can the same class be used on several HTML elements? Yes No, classes must be unique Only on images Only in WordPress admin

Hint
Choose the definition or behavior that best matches the web standard.
17. What is register_activation_hook() used for?

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

Hint
Identify the WordPress API responsibility before considering implementation details.
18. What does HTTP status 200 normally mean?

What does HTTP status 200 normally mean? The request succeeded The server crashed The resource was not found The user is permanently redirected

Hint
Identify the definition or behavior described by the question.
19. Which additional hook is needed when guests may call save_note?

Which additional hook is needed when guests may call save_note? wp_ajax_public_save_note guest_ajax_save_note rest_save_note wp_ajax_nopriv_save_note

Hint
Consider lifecycle, authorization, failure and long-term maintenance.
20. When should permanent plugin cleanup normally occur?

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

Hint
Identify the WordPress API responsibility before considering implementation details.
21. What happens if a filter callback forgets to return the filtered value?

What happens if a filter callback forgets to return the filtered value? The filter becomes an action WordPress automatically returns the original value Later callbacks may receive null or an unintended value PHP always throws a fatal error

Hint
Actions may ignore return values; filters may not.
22. When are active ordinary plugins loaded relative to the active theme?

When are active ordinary plugins loaded relative to the active theme? Plugins load only in wp-admin Plugins load after the closing HTML tag Themes always load first Plugins are loaded before the theme setup and template rendering stages

Hint
Place the concept in the WordPress request, content, or permission model.
23. Which hook is normally used for theme setup?

Which hook is normally used for theme setup? plugins_loaded after_setup_theme wp_ajax save_post

Hint
Separate presentation responsibilities from reusable site functionality.
24. Which function returns a permalink for later use?

Which function returns a permalink for later use? return_url() the_permalink() post_link_echo() get_permalink()

Hint
Identify the role of the WordPress function or extension point.
25. What is a function parameter?

What is a function parameter? A PHP file path only A named input declared by the function The value printed by echo A database table

Hint
Focus on the responsibility of the language feature rather than memorizing punctuation.
26. What does hierarchical mean for a taxonomy?

What does hierarchical mean for a taxonomy? Only administrators can use it Terms can have parent-child relationships It has one term only Terms are sorted alphabetically

Hint
Identify the data-model or security responsibility before choosing the API.
27. What is the essential difference between a WordPress action and a filter?

Choose the statement that correctly describes the contract expected by WordPress.

What is the essential difference between a WordPress action and a filter? An action performs a task; a filter modifies and returns a value. An action must always return a value; a filter returns nothing. Filters work only inside themes. There is no functional difference between them.

Hint
Ask yourself whether the received value must continue through the execution chain.
28. When is one structured array option preferable to many scalar options?

When is one structured array option preferable to many scalar options? When settings form one cohesive unit and are read together When each value is several megabytes When SQL joins are required When values have unrelated lifecycles

Hint
Consider lifecycle, authorization, failure and long-term maintenance.
29. What should happen before optimizing a slow page?

What should happen before optimizing a slow page? Measure and identify the actual bottleneck Rewrite every plugin Disable security Increase every cache lifetime

Hint
Choose the answer that reflects current WordPress engineering practice.
30. Inside a shared callback, which function identifies the hook currently being processed?

Inside a shared callback, which function identifies the hook currently being processed? doing_filter() only did_action() current_filter() get_current_hook()

Hint
Useful when one callback handles several hooks.
31. What does an HTTP response normally contain?

What does an HTTP response normally contain? A DNS password A WordPress nonce only A status code, headers and optionally a body Only a URL slug

Hint
Identify the definition or behavior described by the question.
32. What is The Loop in WordPress?

What is The Loop in WordPress? A CSS animation A database backup The pattern that iterates through posts in a query and renders each one A PHP installation process

Hint
Identify the role of the WordPress function or extension point.
33. Which are built-in WordPress post types?

Which are built-in WordPress post types? Database, table and row Category, tag and role Post, page and attachment Theme, plugin and widget

Hint
Place the concept in the WordPress request, content, or permission model.
34. What is index.php in a classic theme?

What is index.php in a classic theme? The database configuration The media directory The plugin loader The final fallback template

Hint
Separate presentation responsibilities from reusable site functionality.
35. What is the main difference between Draft and Published status?

What is the main difference between Draft and Published status? A draft has no title Published content cannot be edited Drafts exist only in plugins A draft is not publicly published; published content normally is

Hint
Start with the everyday meaning of the WordPress term.
36. What does JSON.parse( text ) do?

What does JSON.parse( text ) do? Converts an object into JSON text Validates HTML Runs PHP code Converts valid JSON text into a JavaScript value

Hint
Identify what the command or language feature is responsible for.
37. Which element represents a paragraph?

Which element represents a paragraph? The p element The br element The div element The span element

Hint
Choose the definition or behavior that best matches the web standard.
38. What is a web server?

What is a web server? Software that receives HTTP requests and returns responses A CSS selector A user role A browser bookmark

Hint
Identify the definition or behavior described by the question.
39. When is a custom REST route generally preferable to admin-ajax?

When is a custom REST route generally preferable to admin-ajax? Only when PHP is unavailable When designing a resource-oriented, reusable HTTP API contract When no request validation is needed When permissions should be skipped

Hint
Consider lifecycle, authorization, failure and long-term maintenance.
40. Which form encoding is required for file uploads?

Which form encoding is required for file uploads? text/css multipart/form-data image/form application/sql

Hint
Focus on what crosses the client/server or local/remote boundary.
41. What is an N+1 query problem?

What is an N+1 query problem? A query returns null Cron runs twice One query has one condition A loop triggers an extra query for each item

Hint
Choose the answer that reflects current WordPress engineering practice.
42. Where are ordinary WordPress plugins stored by default?

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

Hint
Identify the WordPress API responsibility before considering implementation details.
43. Which function returns the parent theme directory URL?

Which function returns the parent theme directory URL? get_stylesheet_directory_uri() get_template_directory_uri() get_theme_file_path() site_url()

Hint
Separate presentation responsibilities from reusable site functionality.
44. What should a theme consider rendering when have_posts() is false?

What should a theme consider rendering when have_posts() is false? A database password The plugin activation screen A useful no-content message or template A PHP fatal error

Hint
Identify the role of the WordPress function or extension point.
45. What should the child theme Template value match?

What should the child theme Template value match? The parent theme folder name The parent display title always The site URL The database name

Hint
Separate presentation responsibilities from reusable site functionality.
46. What makes a useful commit message?

What makes a useful commit message? It explains the intentional change clearly It contains only the word update It copies every changed line It includes secret credentials

Hint
Focus on what crosses the client/server or local/remote boundary.
47. What is a static method associated with?

What is a static method associated with? Only the current browser session A WordPress post A database row The class rather than a particular object instance

Hint
Focus on the responsibility of the language feature rather than memorizing punctuation.
48. Should API keys or production passwords be committed to Git?

Should API keys or production passwords be committed to Git? Only on the main branch No, secrets require protected configuration and rotation if exposed Yes, when the repository is private Yes, inside JSON

Hint
Focus on what crosses the client/server or local/remote boundary.
49. What does the CSS cascade decide?

What does the CSS cascade decide? Which PHP file executes first Which database row is returned Which competing declarations apply to an element Which user may log in

Hint
Choose the definition or behavior that best matches the web standard.
50. What do permalink rewrite rules help WordPress do?

What do permalink rewrite rules help WordPress do? Encrypt URLs Create database backups Map friendly request paths to WordPress query variables Compile theme CSS

Hint
Place the concept in the WordPress request, content, or permission model.
51. Which SQL command removes matching rows?

Which SQL command removes matching rows? DELETE SELECT ALTER GROUP BY

Hint
Identify what the command or language feature is responsible for.
52. What is stored and managed through the Media Library?

What is stored and managed through the Media Library? PHP classes only Web-server virtual hosts User passwords in plain text Uploaded files such as images and documents

Hint
Start with the everyday meaning of the WordPress term.
53. Which file is essential for WordPress to identify an ordinary child theme?

Which file is essential for WordPress to identify an ordinary child theme? wp-config.php style.css with a valid theme header plugin.php database.sql

Hint
Separate presentation responsibilities from reusable site functionality.
54. What is the role of the root index.php in a standard WordPress request?

What is the role of the root index.php in a standard WordPress request? It stores all posts It contains database credentials It is a small front controller entry that loads the WordPress blog header It defines the active theme CSS

Hint
Place the concept in the WordPress request, content, or permission model.
55. How does WordPress connect a registered callback to a fired hook?

How does WordPress connect a registered callback to a fired hook? The files have the same filename The callbacks share a variable The hook name strings match The database assigns an ID

Hint
Identify the role of the WordPress function or extension point.
56. What does check_admin_referer() help verify?

What does check_admin_referer() help verify? A theme stylesheet An administration request nonce and expected action A user password hash A database query

Hint
Identify the data-model or security responsibility before choosing the API.
57. What does the block.json render property identify?

What does the block.json render property identify? A REST namespace A PHP file for dynamic frontend rendering A database schema The editor stylesheet only

Hint
Choose the answer that reflects current WordPress engineering practice.
58. Which keyword declares that a class follows an interface?

Which keyword declares that a class follows an interface? requires uses implements extends

Hint
Focus on the responsibility of the language feature rather than memorizing punctuation.
59. When is a hook preferable to copying a large parent template?

When is a hook preferable to copying a large parent template? When deleting the parent theme When the hook does not exist When the parent exposes a suitable extension point for the small change When editing core

Hint
Separate presentation responsibilities from reusable site functionality.
60. What problem does the WordPress Interactivity API address?

What problem does the WordPress Interactivity API address? Plugin update signing Theme screenshot generation SQL schema migrations Consistent client-side interactions for block frontends

Hint
It concerns frontend behavior in blocks.

1. Why should plugin strings use a consistent text domain?

2. Why centralize or structure hook registration?

3. What does the Content-Type header describe?

4. Which endpoint receives traditional WordPress AJAX requests?

5. Which value is a JavaScript string?

6. What rule applies to an id value in one HTML document?

7. Which functions read and update post metadata?

8. What does git push do?

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

10. What is an HTTP request header?

11. What does the_post_thumbnail() display?

12. What is the main role of wp-admin?

13. What is an object?

14. Which task is normally associated with the Editor role?

15. What does order normally specify?

16. Can the same class be used on several HTML elements?

17. What is register_activation_hook() used for?

18. What does HTTP status 200 normally mean?

19. Which additional hook is needed when guests may call save_note?

20. When should permanent plugin cleanup normally occur?

21. What happens if a filter callback forgets to return the filtered value?

22. When are active ordinary plugins loaded relative to the active theme?

23. Which hook is normally used for theme setup?

24. Which function returns a permalink for later use?

25. What is a function parameter?

26. What does hierarchical mean for a taxonomy?

27. What is the essential difference between a WordPress action and a filter?

28. When is one structured array option preferable to many scalar options?

29. What should happen before optimizing a slow page?

30. Inside a shared callback, which function identifies the hook currently being processed?

31. What does an HTTP response normally contain?

32. What is The Loop in WordPress?

33. Which are built-in WordPress post types?

34. What is index.php in a classic theme?

35. What is the main difference between Draft and Published status?

36. What does JSON.parse( text ) do?

37. Which element represents a paragraph?

38. What is a web server?

39. When is a custom REST route generally preferable to admin-ajax?

40. Which form encoding is required for file uploads?

41. What is an N+1 query problem?

42. Where are ordinary WordPress plugins stored by default?

43. Which function returns the parent theme directory URL?

44. What should a theme consider rendering when have_posts() is false?

45. What should the child theme Template value match?

46. What makes a useful commit message?

47. What is a static method associated with?

48. Should API keys or production passwords be committed to Git?

49. What does the CSS cascade decide?

50. What do permalink rewrite rules help WordPress do?

51. Which SQL command removes matching rows?

52. What is stored and managed through the Media Library?

53. Which file is essential for WordPress to identify an ordinary child theme?

54. What is the role of the root index.php in a standard WordPress request?

55. How does WordPress connect a registered callback to a fired hook?

56. What does check_admin_referer() help verify?

57. What does the block.json render property identify?

58. Which keyword declares that a class follows an interface?

59. When is a hook preferable to copying a large parent template?

60. What problem does the WordPress Interactivity API address?