The WordPress REST API is a robust interface that allows developers to interact with WordPress sites programmatically using standard HTTP requests. It exposes endpoints for managing core elements like posts, pages, users, comments, and media, enabling CRUD (Create, Read, Update, Delete) operations through JSON-formatted data.
This API facilitates the creation of custom applications, mobile apps, and integrations by providing secure access to WordPress data without directly manipulating the database. Key features include authentication via OAuth or JWT, customizable routes, and support for plugins and themes to extend its capabilities.
By decoupling the frontend from the backend, it empowers developers to build dynamic, responsive experiences, such as headless WordPress setups, where content is served via API to various front-end technologies. Overall, it enhances flexibility, scalability, and interoperability for modern web development.
Table of Contents
- Part 1: OnlineExamMaker – Generate and Share WordPress Rest Api Quiz with AI Automatically
- Part 2: 20 WordPress Rest Api Quiz Questions & Answers
- Part 3: Try OnlineExamMaker AI Question Generator to Create Quiz Questions
Part 1: OnlineExamMaker – Generate and Share WordPress Rest Api Quiz with AI Automatically
The quickest way to assess the WordPress Rest Api knowledge of candidates is using an AI assessment platform like OnlineExamMaker. With OnlineExamMaker AI Question Generator, you are able to input content—like text, documents, or topics—and then automatically generate questions in various formats (multiple-choice, true/false, short answer). Its AI Exam Grader can automatically grade the exam and generate insightful reports after your candidate submit the assessment.
What you will like:
● Create a question pool through the question bank and specify how many questions you want to be randomly selected among these questions.
● Allow the quiz taker to answer by uploading video or a Word document, adding an image, and recording an audio file.
● Display the feedback for correct or incorrect answers instantly after a question is answered.
● Create a lead generation form to collect an exam taker’s information, such as email, mobile phone, work title, company profile and so on.
Automatically generate questions using AI
Part 2: 20 WordPress Rest Api Quiz Questions & Answers
or
1. Question: What is the primary purpose of the WordPress REST API?
Options:
A. To manage server hardware
B. To create custom themes
C. To interact with WordPress content via HTTP requests
D. To handle email notifications
Answer: C
Explanation: The WordPress REST API enables developers to access and manipulate WordPress data, such as posts and users, using standard HTTP methods, making it easier to build applications that integrate with WordPress.
2. Question: Which HTTP method is commonly used to retrieve data from the WordPress REST API?
Options:
A. POST
B. PUT
C. GET
D. DELETE
Answer: C
Explanation: The GET method is used to fetch data from endpoints, such as retrieving a list of posts, without modifying any content on the server.
3. Question: What is the default namespace for core WordPress REST API endpoints?
Options:
A. /wp-json/v2/
B. /api/v1/
C. /wordpress/api/
D. /rest/v1/
Answer: A
Explanation: The namespace /wp-json/v2/ is the standard base for WordPress core endpoints, allowing access to features like posts and pages.
4. Question: How can you authenticate requests to the WordPress REST API for protected routes?
Options:
A. Using basic HTTP authentication
B. Using OAuth 2.0 or application passwords
C. Using FTP credentials
D. Using database queries
Answer: B
Explanation: OAuth 2.0 and application passwords provide secure ways to authenticate users for actions that require permissions, ensuring API security.
5. Question: What format does the WordPress REST API use for data exchange?
Options:
A. XML
B. JSON
C. HTML
D. CSV
Answer: B
Explanation: JSON is the default format for requests and responses in the WordPress REST API, making it lightweight and easy to parse in web applications.
6. Question: Which endpoint is used to retrieve a list of all posts in WordPress?
Options:
A. /wp-json/wp/v2/posts
B. /wp-json/v2/pages
C. /wp-json/v2/users
D. /wp-json/v2/comments
Answer: A
Explanation: The /wp-json/wp/v2/posts endpoint specifically handles requests for posts, allowing filtering and pagination.
7. Question: What is a route in the context of the WordPress REST API?
Options:
A. A physical path on the server
B. A URL pattern that maps to a specific API handler
C. A database table
D. A theme template
Answer: B
Explanation: Routes define how the API responds to different URL patterns, linking them to functions that process requests.
8. Question: Can you create custom endpoints in the WordPress REST API?
Options:
A. No, only core endpoints are available
B. Yes, using the register_rest_route function
C. Yes, but only through plugins
D. No, endpoints are fixed
Answer: B
Explanation: The register_rest_route function in WordPress allows developers to add custom endpoints for extending API functionality.
9. Question: What HTTP status code indicates a successful creation of a resource via the REST API?
Options:
A. 200
B. 201
C. 404
D. 500
Answer: B
Explanation: A 201 status code is returned when a new resource, like a post, is successfully created using methods such as POST.
10. Question: Which parameter is used for pagination in WordPress REST API requests?
Options:
A. limit
B. page
C. offset
D. Both B and C
Answer: D
Explanation: The ‘page’ parameter specifies the page number, while ‘offset’ skips a certain number of items, both aiding in handling large datasets.
11. Question: What does the ‘per_page’ parameter control in API requests?
Options:
A. The total number of items
B. The number of items returned per request
C. The order of items
D. The filtering options
Answer: B
Explanation: The ‘per_page’ parameter limits the number of results returned in a single response, improving performance for large queries.
12. Question: How can you filter posts by category in the WordPress REST API?
Options:
A. Using the ‘category’ parameter
B. Using the ‘categories’ parameter
C. Using the ‘tax_query’ parameter
D. Both A and B
Answer: D
Explanation: Both ‘category’ and ‘categories’ parameters can be used to filter posts based on category IDs in API requests.
13. Question: What is the role of the ‘register_rest_field’ function?
Options:
A. To add custom fields to existing endpoints
B. To create new routes
C. To handle authentication
D. To delete data
Answer: A
Explanation: This function allows developers to extend core endpoints by adding custom fields, such as metadata, to responses.
14. Question: Which header is commonly used to specify the API version in requests?
Options:
A. X-WP-Total
B. Accept: application/json
C. There is no specific header for version
D. X-WP-TotalPages
Answer: C
Explanation: The API version is typically handled in the URL (e.g., /v2/), but no specific header is required for versioning in standard requests.
15. Question: What happens if you try to access a non-existent endpoint?
Options:
A. It returns a 200 status
B. It returns a 404 status
C. It creates the endpoint automatically
D. It redirects to the homepage
Answer: B
Explanation: A 404 status code is returned for undefined routes, indicating that the requested resource was not found.
16. Question: Can the WordPress REST API be disabled?
Options:
A. No, it’s always enabled
B. Yes, by adding code to functions.php or using plugins
C. Yes, but only in multisite installations
D. No, it’s required for core functionality
Answer: B
Explanation: You can disable the REST API by using filters like ‘rest_authentication_errors’ or plugins, though it’s not recommended for most sites.
17. Question: What is the purpose of the ‘context’ parameter in API requests?
Options:
A. To specify the language
B. To control the amount of data returned (e.g., view, edit)
C. To set authentication levels
D. To define the response format
Answer: B
Explanation: The ‘context’ parameter, such as ‘view’ or ‘edit’, determines the level of detail in the response, based on user permissions.
18. Question: Which function is used to register a custom REST API controller?
Options:
A. add_action
B. register_rest_route
C. wp_rest_controller
D. Both B and another function
Answer: B
Explanation: register_rest_route is the primary function for defining custom routes and associating them with controller callbacks.
19. Question: How does the WordPress REST API handle errors?
Options:
A. By returning HTML pages
B. By sending JSON responses with error codes and messages
C. By redirecting to an error page
D. By logging errors silently
Answer: B
Explanation: Errors are returned as JSON objects containing details like code and message, allowing clients to handle them programmatically.
20. Question: What is the benefit of using the WordPress REST API for mobile apps?
Options:
A. It provides direct database access
B. It allows apps to interact with WordPress content without a full WordPress installation
C. It speeds up theme loading
D. It handles all caching automatically
Answer: B
Explanation: The REST API enables mobile apps to read and write data from a WordPress site via HTTP, facilitating cross-platform integration.
or
Part 3: Try OnlineExamMaker AI Question Generator to Create Quiz Questions
Automatically generate questions using AI