10 What are the principles of an API test design
API Testing Interview Questions
A list of frequently asked API Testing interview questions and answers aregiven below.
2) What is API testing?
API testing is a type of software testing that involves testing APIs directly.API is a part of integration testing to check whether the API meetsexpectations in terms of functionality, reliability, performance, and securityof applications. Multiple API system can performed API testing. In APItesting, our primary focus is on Business Logic Layer of the softwarearchitecture.* * *
10) What are the principles of an API test design?
Here, are the seven principles of API test design. 1. Exhaustive Testing: Exhaustive testing is not possible. Instead we need optimal amount of testing which is based on the risk assessment of the application. 2. Defect Clustering: Defect Clustering states that a small number of modules contain the most of the defect detected. Approximately 80% of the defect found in 20% of the modules. By experience we can identify such risky modules. But this approach has its own problems. If the same tests are repeated over and over again, eventually the same test case will no longer find new bugs. 3. Pesticide Paradox: Testers cannot depend on existing technique. They must have to look continually to improve the existing method to make testing more effective. But even all these hard work in testing we can never claim our product is bug free. To overcome this, test cases need to be regularly reviewed and revised add new and different test cases to help find more defects. 4. Testing shows presence of defects: Testing principle states that- testing talks about the presence of defects not about the absence of defect. Software testing reduces the probability of undiscovered defects remaining in the software but even if no defects found, it is not a proof of correctness.But if we work hard, taking all precautions and make our software products 99%bug free. The software does not meet the needs and requirements of the client. 5. Absence of error -fallacy: This can be possible the software which is 99% bug free is still unusable. The case can be if the system is tested for the wrong requirement. Software testing is not finding the defects but also to check that software addresses the business needs. The absence of error is fallacy i.e. finding and fixing defects does not help if the system build is unusable and doesn’t fulfill the user’s needs and requirements. 6. Early Testing: Testing should start as soon as possible in the software development lifecycle. So that defects in the requirement or design phase captured in the early stages. It is cheaper to fix defect in the early stages of testing. We should start finding the bug at the moment the requirements are defined. 7. Testing is context dependent: Testing is context dependent that we test an e-commerce site will be different from the way we test the commercial. All the developed software’s are not identical. We will use different methodology; techniques and type of testing depend on the application type.* * *
API Testing Interview Questions And Answers:
Types of API Testing:Testing Type | Description —|— Unit testing | Individual operation functionality testing. Functional testing | Block of unit test results tested together. Load testing | Analyzing performance and functional ability when the load isapplied. Runtime error detection | Manual and automated executions to detect any sortof errors or data leaks. Security testing | To verify the ability to safeguard access and data. Web UI testing | GUI test to identify proper executions of any transactions. Interoperability testing | Validate performance with InteroperabilityProfiles.
Q10. What’s the procedure to test API’s?
Ans: For testing API’s one must follow the below-mentioned steps: 1. Make a selection of the suite you like to add the API test case to 2. Now choose the test development mode 3. Next demands the development of test cases for the required API methods 4. After this, you need to configure the control parameters of the application and then test conditions 5. Once done with all the previous steps, configure method validation 6. Now is the time for execution of the API test 7. After this, you can check test reports and filter API test cases 8. Last but not least, sequence all API test cases. That’s it!
Q11. What is REST API?
Ans: REST API is a set of functions helping developers in performing requestsalong with receiving responses. Through HTTP protocol interaction is made inREST API.The term REST refers to Representational State Transfer. In a very short spanof time, it has become an effective standard for API creation.
Q.7 How to perform API testing?
Ans: API testing is a type of integration testing used to test API to validatethe functionality, performance, and security of the application.API testing should perform the following testing methods: * Discovery testing – This testing manually executes the set of calls documented in the API. * Usability testing – It verifies whether the API is functional, user-friendly, and does API integrates with another platform or not. * Automated testing – It comes while creating a set of scripts or a tool to execute API regularly. * Security testing – It recommends what authentication type is needed and also checks sensitive data encryption. * Documentation – It’s the final phase for a deliverable. The team makes sure the documentation provides enough data to interact with the API.
Q.11 What are the differences between SOAP and REST API?
Ans:SOAP|REST API —|— SOAP stands as Simple Object Access Protocol.|REST stands as Representational State Transfer. It’s largely based and uses only HTTP and XML|It supports different data formats such as HTML, plain text, JSON, XML andmore. But the most preferred format to transfer data is JSON. It’s a protocol|It’s an architectural pattern SOAP uses WS-security and SSL( Secure Socket Layer) for security|On the other hand, REST has SSL and HTTPS for security.
10. What are principles of an API test design?
The five most important principles of an API test design are: * Setup: Create objects, start services, initialize data, etc * Execution: Steps to apply API or the scenario, including logging * Verification: Oracles to evaluate the result of the execution * Reporting: Pass, failed or blocked * Clean up: Pre-test state
Ready to succeed in your next Web API Testing interview
API testing interview questions can be unlimited regarding of the number ofquestions and area covered. Although the above answers might not fully be usedin your interview, we do hope it somehow provides the solid understanding onWeb API testing and gets you ready for the upcoming job and project related toAPI testing.Wish you confidence and luck in your testing career! If you have anysuggestions on this topic, please do not hesitate to add to here. We lookforward to a better and more adequate list to all testers.Read more:Most Common API Interview Questions and Their Answers to Ace the InterviewWhen applying for an API software engineering job, you will need todemonstrate that you have a firm grasp of API, as well as API testing, SOAPand REST. As with any interview, it’s important to prepare answers ahead oftime to ensure that you effectively communicate the skills and knowledgenecessary for the job. This is especially true when interviewing for atechnical position. In this article, we’ll go through questions commonly askedin an API interview and provide sample answers to those questions.Related: How to Introduce Yourself in an Interview
What is the procedure for performing API testing?
Show the interviewer the steps you would take when performing API testing.You’re proving that you actually know what you’re talking about, so take yourtime and be sure to list each action.Example: “When performing API testing, you’ll first choose the suite whereyou’d like to add the API case that you wish to test, then you choose the testdevelopment mode. After that, you create test cases for the desired APImethods, configure the control parameters and test conditions of theapplication as well as the method of validation. Then you can perform the APItest. Once the test is complete, you check the test reports, filter andsequence all of the API test cases.”Image descriptionTop 10 Interview Questions 1. Tell me about yourself. 2. How would you describe yourself? 3. What makes you unique? 4. Why do you want to work here? 5. What interests you about this role? 6. What motivates you? 7. What are you passionate about? 8. Why are you leaving your current job? 9. What are your greatest strengths? 10. What are your greatest weaknesses?
What is REST API?
Be sure to include your reasoning for using REST along with its definition.Example: “REST, or Representational State Transfer, is a set of functions thathelp developers perform requests and receive responses. Interaction isperformed through HTTP Protocol. REST is stateless, so the server has nostatus or session data. With an effectively-applied REST API, you can restartthe server in between two calls. Web services typically use the POST method toperform operations. REST, however, uses GET to access resources.”
What is the protocol for REST Web services?
Make sure that you provide the function of the protocol when answering thisquestion.Example: “HTTP is the protocol used in REST Web services. It facilitatescommunication between the server and the client.”