Quick Answer: What Is API Testing Interview Questions?

What is an API tool?

API is the acronym for Application Programming Interface, which is a software intermediary that allows two applications to talk to each other.

Each time you use an app like Facebook, send an instant message, or check the weather on your phone, you’re using an API..

How do I use API?

Start Using an APIMost APIs require an API key. … The easiest way to start using an API is by finding an HTTP client online, like REST-Client, Postman, or Paw. … The next best way to pull data from an API is by building a URL from existing API documentation.

What is difference between Web service and API testing?

There you have it: an API is an interface that allows you to build on the data and functionality of another application, while a web service is a network-based resource that fulfills a specific task. Yes, there’s overlap between the two: all web services are APIs, but not all APIs are web services.

What is difference between GUI testing and API testing?

UI testing refers to testing graphical user interfaces, such as how user interacts with the application, testing application elements like fonts, layouts, buttons, images, colors, etc. … API testing is checking API of a Software System. In order to check the API , it needs to be called from the calling software .

What is API testing example?

Functional Testing, Integration Testing, Data-Driven Testing, End-to-End API Testing, API Mocking, Load Testing and Performance Testing are examples of various API types. Functional Testing would be implemented to check if an API is up or not.

What is API real time example?

Other examples of APIs that share real-time information include The New York Times, which allows you to analyze their database of thousands of articles, and Spotify, which enables you to search for different types of music. Even NASA has an open API chock-full of satellite imagery and constellation data for public use.

How do we do API testing?

API Testing Best PracticesTest for the typical or expected results first.Add stress to the system through a series of API load tests.Test for failure. … Group test cases by test category.Prioritize API function calls so that it will be easy for testers to test quickly and easily.More items…

What is API validation?

Validation can mean a lot of things, but in API land it generally means figuring out if the data being sent to the API is any good or not. Validation can happen in a lot of different places – it can happen on the server, and it can happen in the client.

What is tested in API testing?

API testing involves testing the application programming interfaces (APIs) directly and as part of integration testing to determine if they meet expectations for functionality, reliability, performance, and security. Since APIs lack a GUI, API testing is performed at the message layer.

What are the tools used for API testing?

Top 25+ API Testing ToolsRapidAPI. The list of best API testing tools starts with RapidAPI. … REST-assured. REST-assured is considered as one of the best tools for testing APIs in Java. … Postman. After REST-assured, the next API testing tool is Postman. … Paw. … SoapUI. … Katalon Studio. … JMeter. … Karate DSL.More items…•

How many different types of APIs are there?

fourWhat are the different types of APIs? There isn’t just one type of API (Application Programming Interface) but actually, there are four main types of APIs: Open APIs, aka Public APIs, are publicly available to developers and other users with minimal restriction.

Why do we do API testing?

The purpose of API Testing is to check the functionality, reliability, performance, and security of the programming interfaces. In API Testing, instead of using standard user inputs(keyboard) and outputs, you use software to send calls to the API, get output, and note down the system’s response.

Is postman a testing tool?

Postman Simplifies Automated Testing. You can aggregate the tests and requests you’ve created into a single automated test sequence. Run and manage your test workflow from the Postman app, Postman monitoring, or from the command line with Newman, Postman’s command line tool.

What are the interview questions for API testing?

Top 20 API Testing Interview Questions & Answers What are the tools used for API testing? … What is API testing? … What are the common tests performed on API’s? … Mention the key difference between UI level testing and API testing? … Explain what is SOAP? … Explain what is REST API? … Difference API and Unit Testing? … How to test API’s ?More items…•

What are the common API testing types?

Example: “API testing is a type of software testing that determines if the developed APIs are functional, reliable and secure. Some of the common API testing types are validation, security, UI, functional, load, penetration, runtime/error detection, fuzz and interoperability and WS Compliance.”

Which tool is best for API testing?

The 10 Best API Testing Tools on the MarketSoapUI. SoapUI is a functional testing tool that addresses API testing. … Katalon Studio. … Postman. … Apigee. … Tricentis Tosca. … API Fortress. … Assertible. … JMeter.More items…•