REST API Basic Interview Questions
- What do you understand by RESTful Web Services? …
- What is a REST Resource? …
- What is URI? …
- What are the features of RESTful Web Services? …
- What is the concept of statelessness in REST? …
- What do you understand by JAX-RS? …
- What are HTTP Status codes? …
- What are the HTTP Methods?
Indeed, What are the 3 components of a RESTful API?
RESTful API Design and Architecture Constraints
- Use of a uniform interface (UI). …
- Client-server based. …
- Stateless operations. …
- RESTful resource caching. …
- Layered system. …
- Code on demand.
Then, What is RESTful API example? For example, a REST API would use a GET request to retrieve a record, a POST request to create one, a PUT request to update a record, and a DELETE request to delete one. All HTTP methods can be used in API calls. A well-designed REST API is similar to a website running in a web browser with built-in HTTP functionality.
What makes a API RESTful? A REST API (also known as RESTful API) is an application programming interface (API or web API) that conforms to the constraints of REST architectural style and allows for interaction with RESTful web services. REST stands for representational state transfer and was created by computer scientist Roy Fielding.
In the same way What is Uri in REST API? URI. REST APIs use Uniform Resource Identifiers (URIs) to address resources. REST API designers should create URIs that convey a REST API’s resource model to the potential clients of the API. When resources are named well, an API is intuitive and easy to use.
How REST APIs are secured?
REST APIs use HTTP and support Transport Layer Security (TLS) encryption. TLS is a standard that keeps an internet connection private and checks that the data sent between two systems (a server and a server, or a server and a client) is encrypted and unmodified.
What is urn in API?
URN stands for Uniform Resource Name. It is a URI that uses a URN scheme. “urn” scheme: It is followed by a namespace identifier, followed by a colon, followed by namespace specific string.
What is urn and URL?
A URN is a formal naming scheme that identifies a resource, but does not indicate its location or how to access it (e.g. ISBN, ISSN). Note: A URL is a link that can retrieve a web-based resource; a URN is a unique identifier, but cannot be used to create a clickable link.
What is REST vs SOAP?
SOAP (Simple Object Access Protocol) is a standards-based web services access protocol that has been around for a long time. Originally developed by Microsoft, SOAP isn’t as simple as the acronym would suggest. REST (Representational State Transfer) is another standard, made in response to SOAP’s shortcomings.
What is caching in REST API?
Caching refers to storing the server response in the client itself, so that a client need not make a server request for the same resource again and again.
What is REST API signature?
REST API Signature
Apikey is required before using REST API to trade and view assets. Limited speed strategy: For the same apikey, the api request is 30 times/5 seconds; for the same ip, when the number of cmd requests exceeds 15 for one api, the speed limit will be 1 time / 1 second.
Should REST API always return 200?
APIs, always have to return 200 except 500. Because when the server dies, it can’t return anything.
What is URI full form?
Uniform Resource Identifier (URI)
The most common form URI is the Uniform Resource Locator (URL) — aka web address — which unambiguously describes and locates a public website or other web-connected resource.
What is difference between URL and URI?
URL is used to describe the identity of an item. URI provides a technique for defining the identity of an item. URL links a web page, a component of a web page or a program on a web page with the help of accessing methods like protocols. URI is used to distinguish one resource from other regardless of the method used.
What is URI used for?
A Uniform Resource Identifier (URI) is a unique sequence of characters that identifies a logical or physical resource used by web technologies. URIs may be used to identify anything, including real-world objects, such as people and places, concepts, or information resources such as web pages and books.
What is URI of URL?
Similar to URL, URI (Uniform Resource Identifier) is also a string of characters that identifies a resource on the web either by using location, name or both. It allows uniform identification of the resources. A URI is additionally grouped as a locator, a name or both which suggests it can describe a URL, URN or both.
What is URI path?
A URI — short for “Uniform Resource Identifier” — is a sequence of characters that distinguishes one resource from another. For example, foo://example.com:8042/over/there?name=ferret#nose is a URI containing a scheme name, authority, path, query and fragment. A URI does not need to contain all these components.
What is a server URI?
Uniform Resource Identifier (URI)
URIs enable the protocols over the internet to conduct the interactions between and among resources. URIs take the form of strings of characters that server as identifiers: names and addresses to connected devices and other resources.
What is SOAP full form?
Simple object access protocol (SOAP) is an official protocol maintained by the World Wide Web Consortium (W3C).
Does REST always use JSON?
For some, REST means a server that exchanges JSON documents with a client over HTTP. Not only is that not a complete definition, but it’s also not always true. The REST specification doesn’t require HTTP or JSON. (The spec doesn’t mention JSON or XML at all.)
Is REST stateful?
Is REST API stateless or stateful? A. REST APIs are stateless because, rather than relying on the server remembering previous requests, REST applications require each request to contain all of the information necessary for the server to understand it.
How do I improve my REST API performance?
Caching is one of the best ways to improve API performance. If you have requests that frequently produce the same response, a cached version of the response avoids excessive database queries. The easiest way to cache responses is to periodically expire it, or force it to expire when certain data updates happen.
How do I reduce response time on REST API?
To reduce the amount of data you send when modifying resources, use a patch request. Example The following example shows the use of the fields parameter with a generic (fictional) “Demo” API. Simple request: This HTTP GET request omits the fields parameter and returns the full resource.
Can we cache POST request?
So, YES, you can cache POST request response but only if it arrives with appropriate headers. In most cases you don’t want to cache the response. But in some cases – such as if you are not saving any data on the server – it’s entirely appropriate.
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