Rest API

Question 1

Define REST API.

Answer 1

A web service that follows Representational State Transfer principles for communication.

Question 2

What does CRUD stand for in REST APIs?

Answer 2

Create, Read, Update, Delete - the four basic operations.

Question 3

True or false: REST APIs use HTTP methods for operations.

Answer 3

TRUE

Common methods include GET, POST, PUT, and DELETE.

Question 4

Fill in the blank: URI stands for ______.

Answer 4

Uniform Resource Identifier.

Question 5

What is the purpose of HTTP status codes?

Answer 5

To indicate the result of an HTTP request.

Question 6

Define endpoint in REST APIs.

Answer 6

A specific URL where a client can access resources.

Question 7

What does JSON stand for?

Answer 7

JavaScript Object Notation - a lightweight data interchange format.

Question 8

True or false: REST APIs can only return JSON format.

Answer 8

FALSE

REST APIs can return XML, HTML, and other formats.

Question 9

Fill in the blank: Stateless means each request from a client must contain ______.

Answer 9

All necessary information to understand the request.

Question 10

What is a resource in REST?

Answer 10

An object or representation of data that can be accessed via a URI.

Question 11

Define HATEOAS.

Answer 11

Hypermedia as the Engine of Application State; a constraint of REST.

Question 12

What is the role of headers in REST API requests?

Answer 12

To provide metadata about the request or response.

Question 13

True or false: REST APIs can be cached.

Answer 13

TRUE

Caching improves performance by storing responses.

Question 14

Fill in the blank: API versioning is important for ______.

Answer 14

Maintaining compatibility as the API evolves.

Question 15

What is the base URL?

Answer 15

The root address for accessing the API.

Question 16

Define API key.

Answer 16

A unique identifier used to authenticate requests.

Question 17

What is pagination in REST APIs?

Answer 17

The process of dividing a large dataset into smaller, manageable parts.

Question 18

Fill in the blank: Rate limiting controls the number of ______.

Answer 18

Requests a user can make in a given time frame.

Question 19

True or false: REST APIs are always synchronous.

Answer 19

FALSE

REST APIs can be designed for asynchronous communication.

Question 20

What is a webhook?

Answer 20

A user-defined HTTP callback triggered by specific events.

Question 21

Define CORS.

Answer 21

Cross-Origin Resource Sharing; a security feature for web applications.

Question 22

What does OAuth provide?

Answer 22

A secure authorization framework for APIs.

Question 23

True or false: REST APIs can only be accessed over HTTPS.

Answer 23

FALSE

REST APIs can also be accessed over HTTP.

Question 24

Fill in the blank: Throttling is used to ______.

Answer 24

Limit the number of requests a client can make.

Question 25

What is **API documentation**?

Answer 25

A guide that explains how to use an API effectively.

Question 26

Define **client** in the context of REST APIs.

Answer 26

An application or user that makes requests to the API.

Question 27

What is the **request body**?

Answer 27

The data sent with a request, typically in JSON format.

Question 28

True or false: REST APIs must use **XML** for data exchange.

Answer 28

FALSE ## Footnote JSON is more commonly used, but XML is also supported.

Question 29

Fill in the blank: **Middleware** is software that acts as a ______.

Answer 29

Bridge between an operating system or database and applications.

Question 30

What is **API testing**?

Answer 30

The process of verifying that an API meets its specifications.

Question 31

Define **service-oriented architecture (SOA)**.

Answer 31

A design pattern that allows services to communicate over a network.

Question 32

What is a **mock server**?

Answer 32

A simulated server that mimics API responses for testing.

Question 33

True or false: REST APIs can be stateless and scalable.

Answer 33

TRUE ## Footnote Statelessness allows for easier scaling of services.

Question 34

Fill in the blank: **API gateway** manages ______.

Answer 34

Traffic between clients and backend services.

Question 35

What is **data serialization**?

Answer 35

The process of converting data structures into a format for transmission.