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What is API testing and how can you prepare for it?

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API testing is a type of software testing that involves verifying and validating the functionality, performance, security, and reliability of application programming interfaces (APIs). APIs are the building blocks of modern applications that allow different systems and components to communicate and exchange data. API testing is essential for ensuring the quality and compatibility of the software products and services that rely on APIs.

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Muhammad Tariq Khalil

Head of R&D - Bio-Labs

1 Why is API testing important?

API testing is important because it can help detect and prevent issues that might affect the user experience, the business logic, or the security of the software. API testing can also help improve the performance, scalability, and efficiency of the software by identifying and optimizing the bottlenecks and errors in the API calls. Additionally, API testing can help ensure compliance with the standards and specifications of the API design and documentation.

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2 What are the types of API testing?

API testing can be classified into different types based on the aspects and levels of the API being tested. Functional testing verifies that the API meets the functional requirements and specifications, while performance testing measures the speed, response time, load capacity, and reliability. Security testing evaluates the security and protection of the API from unauthorized access, attacks, and data breaches. Integration testing checks the compatibility and interoperability of the API with other systems and components, while contract testing validates that the API conforms to the agreement between provider and consumer. Lastly, compliance testing ensures that the API follows industry rules and regulations.

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Muhammad Tariq Khalil

Head of R&D - Bio-Labs
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API (Application Programming Interface) testing is a type of software testing that focuses on verifying the functionality and performance of an application's APIs. There are several types of API testing, each with its specific goals and objectives. Here are some common types of API testing: Unit Testing: Functional Testing: Integration Testing: End-to-End Testing: Load Testing: Security Testing: Stress Testing: Negative Testing: Performance Testing: Mock Testing: Compliance Testing: Interoperability Testing: Regression Testing: Data Validation Testing: Caching Testing:

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3 How to prepare for API testing?

To prepare for API testing, you need to have a thorough understanding of the API's features, functionality, parameters, endpoints, and expected outcomes. You also need to have access to the API documentation, which should provide the details and examples of the API requests and responses. Additionally, you need to have the appropriate tools and frameworks that can help you design, execute, and automate the API tests. Some of these popular tools and frameworks include Postman, Rest-Assured, SoapUI, and JMeter. Postman allows you to create, send, and manage API requests and responses in a user-friendly interface. Rest-Assured enables you to test RESTful APIs using Java with a fluent and expressive syntax. SoapUI supports both RESTful and SOAP-based APIs. Lastly, JMeter can help you perform load and performance testing for your APIs.

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4 What are some common API testing interview questions?

When interviewing for a quality assurance role that involves API testing, you may be asked questions to evaluate your knowledge, skills, and experience in this area. These can include inquiries about the advantages and disadvantages of API testing compared to UI testing, how to choose the type and level of API testing for a given scenario or requirement, how to design and structure test cases and test data, how to debug and troubleshoot issues and errors that occur during API testing, how to measure and report the results and outcomes of API testing, and how to automate API testing with tools and frameworks.

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5 How to ace your API testing interview?

To ace your API testing interview, it is essential to prepare well and demonstrate your competence and confidence in API testing. To do this, you should review the basics and concepts of API testing, such as types, methods, tools, and best practices. Additionally, research the company and the product you are applying for to understand the role and expectations of the quality assurance position. Moreover, practice your API testing skills by solving some mock or real-world API testing problems or scenarios. Additionally, showcase your API testing portfolio and experience by providing examples of your previous or current API testing projects or assignments. Furthermore, be sure to communicate clearly and effectively by explaining your API testing approach, process, and rationale in a concise and logical manner. Lastly, ask relevant and insightful questions about the API testing challenges, goals, and opportunities that the company or the product faces or offers.

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6 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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What is API testing and how can you prepare for it?

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1 Why is API testing important?

2 What are the types of API testing?

3 How to prepare for API testing?

4 What are some common API testing interview questions?

5 How to ace your API testing interview?

6 Here’s what else to consider

Quality Assurance

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What is API testing and how can you prepare for it?

1

2

3

4

5

6

1 Why is API testing important?

2 What are the types of API testing?

3 How to prepare for API testing?

4 What are some common API testing interview questions?

5 How to ace your API testing interview?

6 Here’s what else to consider

Quality Assurance

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