0 / 60 answered

1. 1. When is a server-side render_callback particularly useful for a block?

   When is a server-side render_callback particularly useful for a block?

   Only when the block has no attributes To bypass escaping When output depends on current server data or should update without resaving posts When JavaScript is forbidden in the editor
   Hint

   Consider a latest-posts style block.

2. 2. Which wp_enqueue_script() practices are correct?

   Select all correct answers.

   Which wp_enqueue_script() practices are correct?

   Enqueued scripts always have to load in the document head. Use a controlled version value to support cache invalidation. Print a second hard-coded script tag after enqueueing the same file. Declare dependencies such as jquery in the dependency array.
   Hint

   Dependencies and versioning are part of the registration contract.

3. 3. Why do plugin PHP files often begin with an ABSPATH guard?

   Why do plugin PHP files often begin with an ABSPATH guard?

   To stop direct execution outside WordPress To load translations To activate the plugin To create rewrite rules
   Hint

   ABSPATH is defined by WordPress.

4. 4. What should a plugin do with its recurring events on deactivation?

   What should a plugin do with its recurring events on deactivation?

   Leave unlimited duplicates Unschedule the events it owns when appropriate Disable the database Delete every WordPress cron event
   Hint

   Consider lifecycle, authorization, failure and long-term maintenance.

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

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

   When SQL joins are required When values have unrelated lifecycles When settings form one cohesive unit and are read together When each value is several megabytes
   Hint

   Consider lifecycle, authorization, failure and long-term maintenance.

6. 6. Why is a valid nonce not enough to authorize a change?

   Why is a valid nonce not enough to authorize a change?

   It does not prove the user has permission for the operation It is always public It cannot be used in forms It contains no timestamp
   Hint

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

7. 7. When is do_action_ref_array() useful?

   When is do_action_ref_array() useful?

   When no callbacks exist To create an AJAX nonce To remove all filters When hook arguments are already stored in an array and references matter
   Hint

   Compare it with call_user_func_array().

8. 8. 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?

   The post type rewrite slug. The number of posts returned per page. The SQL table prefix used by the query. Whether the metadata clauses are combined with AND or OR logic.
   Hint

   Think of boolean logic between clauses.

9. 9. What does the supports argument define?

   What does the supports argument define?

   Editor features such as title, editor, thumbnail or revisions Allowed HTTP methods Supported PHP versions Database indexes
   Hint

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

10. 10. What does update_post_meta() do when the meta key does not yet exist?

    What does update_post_meta() do when the meta key does not yet exist?

    It adds the metadata It silently discards the value It throws an exception It creates a custom table
    Hint

    The function supports both creation and update.

11. 11. On which hook should custom REST API routes be registered?

    On which hook should custom REST API routes be registered?

    wp_loaded init template_redirect rest_api_init
    Hint

    The hook is dedicated to REST route registration.

12. 12. 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?

    Invalidating or refreshing it when the underlying data changes Choosing a PHP variable name Serializing arrays Calling get_transient()
    Hint

    Fast stale data may still be wrong.

13. 13. Are the parent and child theme functions.php files merged like CSS?

    Are the parent and child theme functions.php files merged like CSS?

    Yes; only the child file runs No; the child file loads first and the parent file also loads No; the parent file is copied into the child Yes; only the parent file runs
    Hint

    A child functions.php does not replace its parent counterpart.

14. 14. When can no_found_rows improve a WP_Query?

    When can no_found_rows improve a WP_Query?

    When pagination totals are not needed When meta queries are used Only in the admin area When SQL must return no posts
    Hint

    Do you need max_num_pages?

15. 15. Critical records exist only in a transient. What is the design flaw?

    Critical records exist only in a transient. What is the design flaw?

    They never expire Transients are caches and can disappear early They are always public Transients cannot store arrays
    Hint

    Choose the solution with the clearest boundary and safest lifecycle behavior.

16. 16. When should a plugin normally flush rewrite rules for a new CPT?

    Choose the approach that avoids unnecessary work on normal requests.

    When should a plugin normally flush rewrite rules for a new CPT?

    Flush before registering the CPT and never again. Rewrite rules never need flushing for a CPT. Register the CPT and flush once inside the activation workflow. Call flush_rewrite_rules() on every init request.
    Hint

    Flushing is expensive and registration must happen first.

17. 17. Why is cache invalidation important?

    Why is cache invalidation important?

    Caches never expire It reduces CSS specificity It grants permissions Cached results must change when source data changes
    Hint

    Choose the answer that reflects current WordPress engineering practice.

18. 18. What commonly causes a static block validation error?

    What commonly causes a static block validation error?

    A missing user role A slow SQL query Saved content no longer matches the current save output An expired transient
    Hint

    Choose the answer that reflects current WordPress engineering practice.

19. 19. How does hook priority affect callbacks attached to the same hook?

    Assume all callbacks are valid and registered.

    How does hook priority affect callbacks attached to the same hook?

    Priority applies only to filters, not actions. Priority changes how many arguments WordPress passes. Lower numeric priorities run earlier. Higher numeric priorities always run earlier.
    Hint

    Compare numeric priority values.

20. 20. What does a WordPress nonce primarily verify?

    What does a WordPress nonce primarily verify?

    That input is valid That SQL is prepared Request intent and origin within a time window That a user has every capability
    Hint

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

21. 21. What is a benefit of checking object-level capabilities such as edit_post with an object ID?

    What is a benefit of checking object-level capabilities such as edit_post with an object ID?

    It makes the post public It disables roles It skips authentication WordPress can map the request through ownership and post-type rules
    Hint

    Authorization may depend on the object owner and status.

22. 22. What does the public argument broadly influence?

    What does the public argument broadly influence?

    Whether all posts are published Whether PHP code is open source Whether the type is intended for public administration and frontend use Whether users need passwords
    Hint

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

23. 23. Why register a metadata key?

    Why register a metadata key?

    To install WordPress To create a PHP variable To define type, sanitization, authorization and optional REST exposure To replace every update call
    Hint

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

24. 24. What does SCRIPT_DEBUG help test?

    What does SCRIPT_DEBUG help test?

    Media uploads Unminified development versions of core scripts and styles Cron timing SQL permissions
    Hint

    Choose the answer that reflects current WordPress engineering practice.

25. 25. Which WP_Query argument prevents sticky posts from being promoted?

    Which WP_Query argument prevents sticky posts from being promoted?

    no_found_rows sticky_order suppress_sticky ignore_sticky_posts
    Hint

    It does not exclude sticky posts from matching.

26. 26. Which function prints a hidden nonce field for a form?

    Which function prints a hidden nonce field for a form?

    esc_attr() current_user_can() wp_create_user() wp_nonce_field()
    Hint

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

27. 27. What does did_action( $hook_name ) report?

    What does did_action( $hook_name ) report?

    How many callbacks are registered Whether the action is running now How many times the action has fired The last callback result
    Hint

    It is a counter, not a boolean-only check.

28. 28. What can a REST route argument definition provide?

    What can a REST route argument definition provide?

    Validation and sanitization callbacks plus schema information A database migration A JavaScript bundle A replacement for all permission checks
    Hint

    Separate input shape from authorization.

29. 29. Why is wp_unslash() commonly used before sanitizing request data?

    Why is wp_unslash() commonly used before sanitizing request data?

    It verifies a nonce It decodes JSON automatically WordPress may add slashes to request values for compatibility It grants capabilities
    Hint

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

30. 30. Which hook is normally used to register a Custom Post Type?

    You want to call register_post_type() at the point recommended by WordPress.

    Which hook is normally used to register a Custom Post Type?

    save_post shutdown init wp_footer
    Hint

    This hook runs after WordPress has loaded but before the main request is processed.

31. 31. What is dbDelta() designed to help with?

    What is dbDelta() designed to help with?

    Preparing SELECT placeholders Scheduling cron events Deleting all plugin options Creating or updating plugin database table schemas
    Hint

    It is commonly used during versioned migrations.

32. 32. Why pass a default value to get_option()?

    Why pass a default value to get_option()?

    To force autoloading To obtain predictable behavior before the option exists To create a database index To bypass sanitization
    Hint

    Consider lifecycle, authorization, failure and long-term maintenance.

33. 33. What does validation do?

    What does validation do?

    Writes a database row automatically Escapes output for HTML Decides whether input satisfies the required rules Grants a role
    Hint

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

34. 34. What does the Interactivity API provide?

    What does the Interactivity API provide?

    A standard declarative system for interactive block frontends A cron replacement A SQL abstraction A theme installer
    Hint

    Choose the answer that reflects current WordPress engineering practice.

35. 35. Why use a namespace such as my-plugin/v1?

    Why use a namespace such as my-plugin/v1?

    To enqueue scripts To authenticate every user To create a database To avoid collisions and provide an API version boundary
    Hint

    Consider lifecycle, authorization, failure and long-term maintenance.

36. 36. Which function should authorize whether the current user may perform a WordPress operation?

    Choose the function intended for capability checks.

    Which function should authorize whether the current user may perform a WordPress operation?

    get_bloginfo() wp_verify_nonce() alone is_admin() current_user_can()
    Hint

    Roles group capabilities, but code should generally check the required capability.

37. 37. What format must a block name use?

    What format must a block name use?

    namespace:block:name BlockName only namespace/block-name plugin.php/block
    Hint

    Choose the answer that reflects current WordPress engineering practice.

38. 38. What should follow a secondary WP_Query loop that called the_post()?

    What should follow a secondary WP_Query loop that called the_post()?

    wp_reset_postdata() delete_post_meta() flush_rewrite_rules() wp_reset_query() in every case
    Hint

    Identify the WordPress API responsibility before considering implementation details.

39. 39. Which function returns the active theme directory, including the child theme when one is active?

    Which function returns the active theme directory, including the child theme when one is active?

    get_stylesheet_directory() locate_template_url() get_template_directory() get_theme_root_uri()
    Hint

    Stylesheet and template can mean child and parent.

40. 40. When should stored data be escaped?

    When should stored data be escaped?

    Never after sanitization Only during plugin activation Only before storing it When it is output, using the function for that context
    Hint

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

41. 41. What must code do after a transient cache miss?

    What must code do after a transient cache miss?

    Regenerate the value safely and store it again Throw a fatal error Assume empty data is correct Delete WordPress
    Hint

    Choose the answer that reflects current WordPress engineering practice.

42. 42. Which WP_Query argument filters posts by taxonomy terms?

    Which WP_Query argument filters posts by taxonomy terms?

    taxonomy_where tax_query meta_query term_filter
    Hint

    Metadata and taxonomy data use different query arguments.

43. 43. What makes a safe data migration?

    What makes a safe data migration?

    Running destructive SQL on every request Ignoring partial failure Depending on one browser session Versioned, idempotent, bounded and recoverable behavior
    Hint

    Choose the solution with the clearest boundary and safest lifecycle behavior.

44. 44. Why should SAVEQUERIES not remain enabled casually?

    Why should SAVEQUERIES not remain enabled casually?

    Collecting every query has a performance and memory cost It changes permalinks It disables SQL It logs out users
    Hint

    Choose the answer that reflects current WordPress engineering practice.

45. 45. Which order best describes a secure form handler?

    Which order best describes a secure form handler?

    Authorize from JavaScript only Confirm request, verify nonce, authorize, validate/sanitize, store, redirect, escape later output Escape SQL, activate plugin, redirect Store first, then check permission
    Hint

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

46. 46. A loop runs a custom query for each of 200 posts. What should review investigate?

    A loop runs a custom query for each of 200 posts. What should review investigate?

    More echo calls Batch retrieval, primed caches or a different query shape A higher hook priority More template files
    Hint

    Choose the solution with the clearest boundary and safest lifecycle behavior.

47. 47. What does full-page caching avoid?

    What does full-page caching avoid?

    Plugin updates DNS resolution everywhere Repeating most WordPress generation for cacheable responses Database backups
    Hint

    Choose the answer that reflects current WordPress engineering practice.

48. 48. Why must code treat get_transient() returning false carefully?

    Why must code treat get_transient() returning false carefully?

    False means the database failed False means missing or expired, so a stored false value is ambiguous False means the user logged out False is converted to an empty post
    Hint

    Avoid caching a literal false when you must distinguish it.

49. 49. Which function sanitizes a lowercase machine-readable key?

    Which function sanitizes a lowercase machine-readable key?

    esc_js() sanitize_key() sanitize_textarea_field() wpautop()
    Hint

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

50. 50. Which hook supplies standard wrapper props in the editor?

    Which hook supplies standard wrapper props in the editor?

    useBlockProps() usePostQuery() useThemeFile() useWpNonce()
    Hint

    Choose the answer that reflects current WordPress engineering practice.

51. 51. Which function registers a stylesheet for a specific block type?

    Which function registers a stylesheet for a specific block type?

    wp_enqueue_block_style() enqueue_editor_only() add_block_css() wp_register_theme_css()
    Hint

    It can avoid loading block CSS where it is not needed.

52. 52. Why may a long-running cron job need a lock or idempotency guard?

    Why may a long-running cron job need a lock or idempotency guard?

    Cron cannot use PHP functions Locks grant capabilities Concurrent or repeated executions must not duplicate side effects It makes URLs shorter
    Hint

    Consider lifecycle, authorization, failure and long-term maintenance.

53. 53. A plugin deletes all data on deactivation. What is wrong?

    A plugin deletes all data on deactivation. What is wrong?

    Options cannot be deleted Deactivation is reversible; permanent deletion belongs to explicit uninstall policy Only themes uninstall Deactivation cannot run PHP
    Hint

    Choose the solution with the clearest boundary and safest lifecycle behavior.

54. 54. What is the risk of too much autoloaded option data?

    What is the risk of too much autoloaded option data?

    PHP cannot read arrays WordPress stops supporting plugins Options become public automatically Every request may load unnecessary memory and database data
    Hint

    Consider lifecycle, authorization, failure and long-term maintenance.

55. 55. Which helper sends a JSON success response and terminates a WordPress AJAX request?

    Which helper sends a JSON success response and terminates a WordPress AJAX request?

    wp_die_json() return_json() wp_send_json_success() esc_js()
    Hint

    WordPress provides paired success and error helpers.

56. 56. What is a Custom Post Type?

    What is a Custom Post Type?

    A user role A custom database server A PHP scalar type A developer-registered kind of WordPress content
    Hint

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

57. 57. A REST route omits permission_callback because it is public. What should change?

    A REST route omits permission_callback because it is public. What should change?

    Add an explicit __return_true permission callback Move it to admin-ajax Require administrator Disable REST
    Hint

    Choose the solution with the clearest boundary and safest lifecycle behavior.

58. 58. Why is total query count alone insufficient?

    Why is total query count alone insufficient?

    SQL is never a bottleneck Every query costs the same Counts cannot be measured A few slow queries may matter more than many fast cached ones
    Hint

    Choose the answer that reflects current WordPress engineering practice.

59. 59. Which function registers a taxonomy?

    Which function registers a taxonomy?

    register_term_type() add_category_table() register_taxonomy() wp_taxonomy_create()
    Hint

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

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

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

    Plugins and WordPress use them to print registered assets and markup They render the post title They enable permalinks They create database tables
    Hint

    Without them, enqueued assets may disappear.