Full WordPress Developer Interview

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Full WordPress Developer Interview

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1. What does an interface primarily define?

What does an interface primarily define? Stored object values A database schema A contract of methods implementing classes must provide A rendered admin screen

Hint
Focus on the responsibility of the language feature rather than memorizing punctuation.
2. What is the purpose of deprecated block versions in registerBlockType settings?

What is the purpose of deprecated block versions in registerBlockType settings? Remove REST routes Disable the block permanently Translate PHP strings Migrate and recognize older saved block markup

Hint
Existing posts may contain old markup.
3. Which JSON value is an object?

Which JSON value is an object? title=Hello ["Hello"] Hello {"title":"Hello"}

Hint
Focus on what crosses the client/server or local/remote boundary.
4. What does get_posts() provide?

What does get_posts() provide? A convenient wrapper for retrieving a simple collection of posts A replacement database A user authentication API An HTML template loader

Hint
Identify the WordPress API responsibility before considering implementation details.
5. What is the main purpose of a child theme?

What is the main purpose of a child theme? Replace WordPress core Create a database copy Store plugin data Customize or extend a parent theme without editing its files

Hint
Separate presentation responsibilities from reusable site functionality.
6. Which HTTP method is normally used to retrieve a resource without requesting a state change?

Which HTTP method is normally used to retrieve a resource without requesting a state change? PATCH GET POST DELETE

Hint
Identify the definition or behavior described by the question.
7. How should a plugin add frontend JavaScript or CSS?

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

Hint
Identify the WordPress API responsibility before considering implementation details.
8. How are callbacks with the same priority generally ordered?

How are callbacks with the same priority generally ordered? By plugin folder size Randomly By the order in which they were registered Alphabetically

Hint
Identify the role of the WordPress function or extension point.
9. Why must classic themes call wp_head() and wp_footer()?

Why must classic themes call wp_head() and wp_footer()? They create database tables Plugins and WordPress use them to print registered assets and markup They enable permalinks They render the post title

Hint
Without them, enqueued assets may disappear.
10. Which operator concatenates PHP strings?

Which operator concatenates PHP strings? & + . ::

Hint
Identify the definition or behavior described by the question.
11. Why should a developer avoid editing WordPress core files?

Why should a developer avoid editing WordPress core files? Themes stop loading permanently The database rejects edited files Updates overwrite changes and core modifications are difficult to maintain securely Core files cannot contain PHP

Hint
Place the concept in the WordPress request, content, or permission model.
12. On which hook are Custom Post Types normally registered?

On which hook are Custom Post Types normally registered? shutdown wp_footer save_post only init

Hint
Identify the data-model or security responsibility before choosing the API.
13. What is the recommended role of block.json in modern block development?

What is the recommended role of block.json in modern block development? Store visitor answers Declare shared block metadata used by WordPress and tooling Replace every render callback Register a custom database table

Hint
It is a manifest for a block.
14. What should be treated as a plugin public API?

What should be treated as a plugin public API? Debug messages Temporary local variables Only private methods Documented hooks, functions, classes, routes and stored contracts used externally

Hint
Choose the solution with the clearest boundary and safest lifecycle behavior.
15. What does the CSS cascade decide?

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

Hint
Choose the definition or behavior that best matches the web standard.
16. When is __construct() normally called?

When is __construct() normally called? When a new object is instantiated After every method call When the object is printed Only when PHP shuts down

Hint
Focus on the responsibility of the language feature rather than memorizing punctuation.
17. What makes a useful commit message?

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

Hint
Focus on what crosses the client/server or local/remote boundary.
18. What does has_archive enable for a public CPT?

What does has_archive enable for a public CPT? Automatic database backups A post-type archive route User registration Media compression

Hint
Identify the data-model or security responsibility before choosing the API.
19. What type of layout is CSS Grid particularly suited for?

What type of layout is CSS Grid particularly suited for? Two-dimensional rows and columns PHP exception handling DNS lookup Password hashing

Hint
Choose the definition or behavior that best matches the web standard.
20. What does git push do?

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

Hint
Focus on what crosses the client/server or local/remote boundary.
21. What does get_footer() normally load?

What does get_footer() normally load? The last database row The WordPress debug log The theme footer template A REST response footer

Hint
Separate presentation responsibilities from reusable site functionality.
22. How does a block-level box normally behave?

How does a block-level box normally behave? It starts on a new line and generally takes available inline width It always remains inside text It is removed from layout It cannot have padding

Hint
Choose the definition or behavior that best matches the web standard.
23. Why can offset complicate ordinary pagination?

Why can offset complicate ordinary pagination? It changes result positioning and can conflict with page calculations It disables SQL It changes the site URL It deletes skipped posts

Hint
Identify the WordPress API responsibility before considering implementation details.
24. What is The Loop in WordPress?

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

Hint
Identify the role of the WordPress function or extension point.
25. What is the hard part of caching a database query in a transient?

What is the hard part of caching a database query in a transient? Calling get_transient() Serializing arrays Choosing a PHP variable name Invalidating or refreshing it when the underlying data changes

Hint
Fast stale data may still be wrong.
26. What is an HTTP request header?

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

Hint
Focus on what crosses the client/server or local/remote boundary.
27. When is a custom REST route generally preferable to admin-ajax?

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

Hint
Consider lifecycle, authorization, failure and long-term maintenance.
28. What is a taxonomy term?

What is a taxonomy term? A template file One classification value inside a taxonomy A post type A PHP constant

Hint
Identify the data-model or security responsibility before choosing the API.
29. What does an HTML form action specify?

What does an HTML form action specify? The URL that receives the submission The database table The submit button color The PHP version

Hint
Focus on what crosses the client/server or local/remote boundary.
30. Which task is normally associated with the Editor role?

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

Hint
Start with the everyday meaning of the WordPress term.
31. What should a setting sanitization callback return?

What should a setting sanitization callback return? A capability name only HTML output The validated and normalized value to store The database password

Hint
Consider lifecycle, authorization, failure and long-term maintenance.
32. Which function returns the active child theme directory URL?

Which function returns the active child theme directory URL? get_template_directory_uri() content_url() only admin_url() get_stylesheet_directory_uri()

Hint
Separate presentation responsibilities from reusable site functionality.
33. Which output-escaping pairs are appropriate for their context?

Select all correct answers. The values are dynamic and are about to be rendered.

Which output-escaping pairs are appropriate for their context? esc_html() for text placed between HTML tags. esc_url() for a URL placed in href or src. sanitize_text_field() always replaces escaping at output time. esc_attr() is preferable to esc_url() for every URL.

Hint
Visible HTML text and a URL attribute require different escaping functions.
34. What does the_permalink() output?

What does the_permalink() output? The template filename The permalink URL for the current post The database table name The post title

Hint
Identify the role of the WordPress function or extension point.
35. What does the third get_post_meta() argument control?

What does the third get_post_meta() argument control? Whether to escape HTML Whether to publish the post Whether to delete the key Whether to return one value instead of an array of values

Hint
Identify the data-model or security responsibility before choosing the API.
36. What is the primary responsibility of a WordPress theme?

What is the primary responsibility of a WordPress theme? Control presentation and templates Replace WordPress core Store MySQL passwords Manage the web server

Hint
Start with the everyday meaning of the WordPress term.
37. What does class Child extends Parent express?

What does class Child extends Parent express? Parent is deleted Child includes a PHP file named Parent Child inherits accessible behavior and state from Parent Both classes become functions

Hint
Focus on the responsibility of the language feature rather than memorizing punctuation.
38. What does a URL identify?

What does a URL identify? A PHP variable type The location of a resource and how to access it A WordPress capability Only a database password

Hint
Identify the definition or behavior described by the question.
39. What does null represent in PHP?

What does null represent in PHP? A failed SQL table The absence of a value An empty HTML element The integer zero only

Hint
Identify the definition or behavior described by the question.
40. Why use the Post/Redirect/Get pattern after a successful form submission?

Why use the Post/Redirect/Get pattern after a successful form submission? To skip authorization To store passwords in the URL To reduce accidental resubmission when the result page is refreshed To disable browser history

Hint
Focus on what crosses the client/server or local/remote boundary.
41. What does WP_DEBUG_LOG do when debugging is enabled?

What does WP_DEBUG_LOG do when debugging is enabled? Stores logs as posts Fixes exceptions Emails every visitor Writes errors to a configured debug log

Hint
Choose the answer that reflects current WordPress engineering practice.
42. What is CSS inheritance?

What is CSS inheritance? Browsers ignore parent elements Child themes copy PHP automatically Some property values pass from a parent element to its descendants Every style is copied into the database

Hint
Choose the definition or behavior that best matches the web standard.
43. What is init commonly used for?

What is init commonly used for? Printing the closing HTML tag Connecting to DNS Registering content structures and general functionality after WordPress has loaded Saving every post

Hint
Identify the role of the WordPress function or extension point.
44. Why does valid element nesting matter?

Why does valid element nesting matter? Browsers and assistive technology can interpret the intended structure more reliably It removes the need for CSS It changes the server IP It automatically secures PHP

Hint
Choose the definition or behavior that best matches the web standard.
45. Why pass an object ID when checking a meta capability such as edit_post?

Why pass an object ID when checking a meta capability such as edit_post? It creates the post It changes the current user It sanitizes the ID Permission may depend on that object, its author and status

Hint
Identify the data-model or security responsibility before choosing the API.
46. What does the === operator compare?

What does the === operator compare? String length Value and type Only variable names Only value after conversion

Hint
Identify the definition or behavior described by the question.
47. Which task is most suitable for the shutdown hook?

Which task is most suitable for the shutdown hook? Registering a post type Changing template hierarchy Final lightweight cleanup or logging after the response lifecycle Enqueueing a stylesheet

Hint
It is late in the request.
48. A recurring event is scheduled on every request. What happens?

A recurring event is scheduled on every request. What happens? The database resets Duplicate events may accumulate; check wp_next_scheduled() WordPress merges every event automatically The theme deactivates

Hint
Choose the solution with the clearest boundary and safest lifecycle behavior.
49. What does an INNER JOIN return?

What does an INNER JOIN return? Every row from both tables regardless of matches Only table definitions Rows with matching join conditions in both joined sources Only deleted rows

Hint
Identify what the command or language feature is responsible for.
50. What does the methods route argument define?

What does the methods route argument define? User roles Response fields Database columns The accepted HTTP methods

Hint
Consider lifecycle, authorization, failure and long-term maintenance.
51. Why should plugin post types, taxonomies, options and functions use a unique prefix or namespace?

Why should plugin post types, taxonomies, options and functions use a unique prefix or namespace? To enable pretty permalinks automatically To avoid naming collisions To make queries run in parallel To bypass capability checks

Hint
Several plugins share the same runtime.
52. What does relation control in a WP_Query meta_query?

The query contains more than one metadata condition.

What does relation control in a WP_Query meta_query? Whether the metadata clauses are combined with AND or OR logic. The post type rewrite slug. The SQL table prefix used by the query. The number of posts returned per page.

Hint
Think of boolean logic between clauses.
53. What does hierarchical mean for a taxonomy?

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

Hint
Identify the data-model or security responsibility before choosing the API.
54. Which element should trigger an in-page action such as opening a dialog?

Which element should trigger an in-page action such as opening a dialog? The button element The h2 element The label element An anchor without href

Hint
Choose the definition or behavior that best matches the web standard.
55. What does array.filter( callback ) return?

What does array.filter( callback ) return? The array length A new array containing accepted elements A single object only A PHP error

Hint
Identify what the command or language feature is responsible for.
56. Which are built-in WordPress post types?

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

Hint
Place the concept in the WordPress request, content, or permission model.
57. What does === compare in JavaScript?

What does === compare in JavaScript? Object property count Values after automatic string conversion Only variable names Value without type coercion

Hint
Identify what the command or language feature is responsible for.
58. Which function both translates and safely escapes plain text for HTML output?

Which function both translates and safely escapes plain text for HTML output? esc_html__() wp_kses_post() __() sanitize_text_field()

Hint
Combine internationalization with context-appropriate output escaping.
59. 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 is a small front controller entry that loads the WordPress blog header It defines the active theme CSS It contains database credentials It stores all posts

Hint
Place the concept in the WordPress request, content, or permission model.
60. Which order best describes a secure form handler?

Which order best describes a secure form handler? Confirm request, verify nonce, authorize, validate/sanitize, store, redirect, escape later output Store first, then check permission Escape SQL, activate plugin, redirect Authorize from JavaScript only

Hint
Identify the data-model or security responsibility before choosing the API.

1. What does an interface primarily define?

2. What is the purpose of deprecated block versions in registerBlockType settings?

3. Which JSON value is an object?

4. What does get_posts() provide?

5. What is the main purpose of a child theme?

6. Which HTTP method is normally used to retrieve a resource without requesting a state change?

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

8. How are callbacks with the same priority generally ordered?

9. Why must classic themes call wp_head() and wp_footer()?

10. Which operator concatenates PHP strings?

11. Why should a developer avoid editing WordPress core files?

12. On which hook are Custom Post Types normally registered?

13. What is the recommended role of block.json in modern block development?

14. What should be treated as a plugin public API?

15. What does the CSS cascade decide?

16. When is __construct() normally called?

17. What makes a useful commit message?

18. What does has_archive enable for a public CPT?

19. What type of layout is CSS Grid particularly suited for?

20. What does git push do?

21. What does get_footer() normally load?

22. How does a block-level box normally behave?

23. Why can offset complicate ordinary pagination?

24. What is The Loop in WordPress?

25. What is the hard part of caching a database query in a transient?

26. What is an HTTP request header?

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

28. What is a taxonomy term?

29. What does an HTML form action specify?

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

31. What should a setting sanitization callback return?

32. Which function returns the active child theme directory URL?

33. Which output-escaping pairs are appropriate for their context?

34. What does the_permalink() output?

35. What does the third get_post_meta() argument control?

36. What is the primary responsibility of a WordPress theme?

37. What does class Child extends Parent express?

38. What does a URL identify?

39. What does null represent in PHP?

40. Why use the Post/Redirect/Get pattern after a successful form submission?

41. What does WP_DEBUG_LOG do when debugging is enabled?

42. What is CSS inheritance?

43. What is init commonly used for?

44. Why does valid element nesting matter?

45. Why pass an object ID when checking a meta capability such as edit_post?

46. What does the === operator compare?

47. Which task is most suitable for the shutdown hook?

48. A recurring event is scheduled on every request. What happens?

49. What does an INNER JOIN return?

50. What does the methods route argument define?

51. Why should plugin post types, taxonomies, options and functions use a unique prefix or namespace?

52. What does relation control in a WP_Query meta_query?

53. What does hierarchical mean for a taxonomy?

54. Which element should trigger an in-page action such as opening a dialog?

55. What does array.filter( callback ) return?

56. Which are built-in WordPress post types?

57. What does === compare in JavaScript?

58. Which function both translates and safely escapes plain text for HTML output?

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

60. Which order best describes a secure form handler?