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Web API is a crucial API for applications that can provide web services to be used across a vast spectrum of devices and browsers like smartphones, tablets, and other devices. It is essential because of its light and simple services and being able to work as a stand-alone web service application.
Suppose you’re studying Web API or an experienced professional working to build their expertise within this framework. In that case, you’re aware of the importance of having a trustworthy source that includes Web API Interview questions. As the main focus for Web API is on practicality, every set of questions should focus on the use of Web API in real-world scenarios. These questions for interviews can assist you in getting your desired job in this area.
Web API Interview Questions
Learn how to better understand Web API by delving into these Web API Interview Questions, which can help you prepare for an interview for a job or improve your understanding and knowledge of this topic.
Q1: What exactly is Web API?
WebAPI is a web-based framework that assists you in developing or building HTTP services.
Q2: What are the reasons why Web API is required? Can you use RESTful services via WCF?
We can create RESTful applications using WCF. But, there are two significant reasons for users to utilize Web API instead of RESTful services.
- Web API enhances TDD (Test Data-Driven) method of creation of RESTful services.
- If you want to create RESTful web services with WCF, you will need lots of configuration options, URI templates, contracts, and endpoints to build RESTful services with web API.
Q3: Why choose Web API?
- It can be used to build simple non-SOAP-based HTTP Services.
- It’s also a simple way to build with Web API. It is possible to create Web APIs using WCF REST Services
- It is an HTTP extension and is easy to define, expose, and then consume in a RESTful fashion.
- It’s a lightweight design and is ideal for devices with low bandwidth, like smartphones.
Q4: Is it accurate to say that ASP.NET Web API has replaced WCF?
It’s not a truthful claim assertion that ASP.NET Web API has replaced WCF. It’s another method to build not SOAP-based services, i.e., plain XML or JSON string.
Q5: What are the benefits of Web API?
Benefits from Web API are:
- OData
- Filters
- Content Negotiation
- Self-Hosting
- Routing
- Model Bindings
Q6: What are the main return types that are supported by Web API?
A Web API controller action can provide the following results:
- Void-It will deliver empty content
- HttpResponseMessage It will transform the response into the form of an HTTP message.
- IHttpActionResult calls internally ExecuteAsync to generate an HttpResponseMessage
- Other types – You may record your serialized return values in the body of the response
Q7: Web API is compatible with what protocol?
Web App supports HTTP protocol.
Q8: What is the .NET framework compatible with Web API?
NET 4.0 and up versions support web API.
Q9: Web API is a part of which open-source libraries for JSON serialization?
Web API utilizes the Json.NET library to perform JSON serialization.
Q10: As a default, Web API sends HTTP responses using the following status codes for every non-caught exception?
500 Internal Server Error
Q11: Which is the main drawback of using “Other Return Types” in Web API?
The main drawback of this method is that you cannot immediately provide an error code such as the 404 error.
Q12: What is the significance of important the Web API important?
Web API is generally considered as a service that gives us data or information via the servers. It is essential due to the following reasons:
- It serves as an interface for websites and clients to gain access to information.
- It is also possible to retrieve information from databases and save it for later transfer to the database.
- It supports a variety of text formats, including XML, JSON, etc.
- It works with all browsers and with any desktop, mobile Web, mobile, etc.
- It utilizes low bandwidth, like XML, as well as JSON data, for example. This is why it is recommended for devices with only a tiny bandwidth like smartphones, etc.
- From a business perspective, the business perspective web API can be more useful in UI/UX. It increases curiosity about the company’s products and services and increases the number of visitors to websites.
Q13: What exactly is Web API, and why should we use it?
As THE NAME IMPLIES, web API (Application Programming Interface) can be described as an API accessible via the Web using the HTTP protocol. It is generally considered the most effective platform for sharing or exposing data and services to different services. The tool could be used to transfer data to a server and is accessible via server code. It can be constructed or designed using different techniques like Java, ASP.NET, etc.
Web API uses:
- It has layers of additional functionality that standardize communications and offer a variety of ways to format the input and output.
- It is compatible in conjunction with ASP.NET MVC and other kinds of web applications like ASP.NET WebForms.
- If you want to develop resource-oriented services and applications, it is recommended to use Web API services. Web API services are considered to be the most effective.
- It also assists in the development of SOAP-based SOAP-based services and REST-ful services.
Q14: What are the primary return types that are supported by Web API?
It doesn’t have any particular data type. It can provide data of any kind based on specific business requirements. There are numerous HTTP methods such as GET POST and PUT. that can provide data in various formats based on the purpose of use.
Q15: What’s the distinction between Web API and WCF?
WCF(Windows Communication Foundation) This framework is to develop SOAP (Service-oriented software). This framework is utilized to create, configure deployment, and create network-distributed applications.
Web API is an interface for application programming that is compatible with both web browsers and web servers. Browser API is a simple extension or improves the functionality of web browsers, while Server API is merely an extension or improves the functionality of web servers.
Q16: Why should you choose Web API over WCF?
Web API is considered to be the preferred choice over WCF due to these reasons.
- Web API uses all the features of HTTP, including URIs headers for request and response, versions, caching, formats of content, etc.
- There is no need to explain or define any additional configuration setting available to different devices within the Web API.
- Web API uses different text formats like XML. As a result, it is more efficient and famous for lightweight services.
- Web API also includes MVC features, whereas WCF is not able to offer MVC features.
- Web API offers more flexibility when compared to WCF.
- Web API employs traditional security methods, such as token authentication, simple authentication etc., for providing secure service, while WCF utilizes the WS-I standard to provide secure services.
Q17: What is the difference between REST API and RESTful API? API?
REST (Representation State Transfer) API: It’s essentially an architectural style that allows efficient use of technologies and protocols on the internet. It’s a set of guidelines that developers must follow when developing their APIs or services which are adaptable. It can be used to implement the HTTP protocol by using its verbs like POST, GET, DELETE and PUT, and DELETE.
RESTful API It can be called web services that implement such an architecture.
Q18: What are the benefits of the use of Rest in Web API?
REST is exceptionally crucial and helpful to Web API because of the following reasons:
- It makes it easier to transfer data between server and client.
- It’s simple to use and light.
- It offers greater flexibility.
- It also handles and manages various kinds of calls while also returning different formats of data.
- It is regarded as the best choice in mobile apps since it results in smaller data transfers between the client and server.
- It utilizes simple HTTP calls for inter-machine communications instead of more complicated alternatives such as CORBA, COM+, SOAP or RPC.
Q19: What’s what is Web API 2.0?
It is an upgraded and modified function in the Web API. The new version is compatible with a variety of new features, which are listed below:
- New Attribute for Routing
- Secure ASP.NET Web API using OAuth 2.0
- The support for Cross-Origin requests made using CORS
- IHttpActionResult’s return type
- Support for expanding, $expand, $select in the OData Service.
With all the new features in Web API 2.0, it is thought to be an ideal choice and appropriate design pattern, making it simpler to create RESTful service interfaces that clients can use across different platforms. It also lets you configure routes within web API at the Web API method or controller level.
Q20: Let us explain the formatters for media types.
In the web API, media type formatters are the classes responsible for serializing data. Serialization is the process of translating information into an appropriate format that can be sent and later reconstructed. By serializing response and request details, Web API can understand the data format used by request more efficiently and then send the data in a format the user expects. It is merely a way to specify the data transmitted between the server and the client as HTTP responses or requests.
Q21: Web API is compatible with which protocol?
Web API typically supports only HTTP protocol.
