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Here are the 10 most commonly asked API Testing interview questions and answers: ① What is API Testing? API Testing involves verifying application programming interfaces to ensure they meet functionality, reliability, performance, and security requirements. ② What is the difference between REST and SOAP APIs? REST: Lightweight, uses JSON or XML, stateless, and works over HTTP/HTTPS. SOAP: Protocol-based, uses XML, supports stateful operations, and works over HTTP/HTTPS, SMTP, etc. ③ Explain common HTTP methods used in API testing. GET: Retrieve data from the server. POST: Submit data to the server to create a resource. PUT: Update or replace an existing resource. DELETE: Remove a resource from the server. ④ What are the standard HTTP status codes, and what do they mean? 200: OK (Success). 400: Bad Request (Client Error). 401: Unauthorized (Authentication Needed). 500: Internal Server Error (Server Issue). ⑤ What is the difference between API Testing and Unit Testing? API Testing: Validates end-to-end business logic and data flow across systems. Unit Testing: Focuses on individual components of code. ⑥ Which tools are commonly used for API Testing? Postman: For manual testing and script automation. Rest Assured: Java-based library for automated API testing. SoapUI: Used for SOAP and REST API testing. ⑦ What are the different types of API authentication? OAuth: Token-based secure authentication. Basic Auth: Encoded username and password. API Key: Unique identifier to access APIs. ⑧ What are some best practices for writing API test cases? Define endpoint coverage. Test for valid and invalid inputs. Validate response status codes, headers, and payloads. Include edge case scenarios. ⑨ How do you handle errors in APIs? Validate error codes like 4xx (client errors) and 5xx (server errors). Ensure appropriate error messages are returned. Test scenarios for timeout and rate-limiting issues. ⑩ What is a Mock API, and why is it used? Mock APIs simulate the behavior of a real API, allowing testing when the actual API is unavailable or under development. #sqa #apitesting #interviewquestions #qajobsinlahore 🔗 Follow Ahmed Hassan for more insights and updates on Quality Assurance, automation testing, and tips to enhance software quality.

Here are the 10 most commonly asked API Testing interview questions and answers: ① What is API Testing? API Testing involves verifying application programming interfaces to ensure they meet functionality, reliability, performance, and security requirements. ② What is the difference between REST and SOAP APIs? REST: Lightweight, uses JSON or XML, stateless, and works over HTTP/HTTPS. SOAP: Protocol-based, uses XML, supports stateful operations, and works over HTTP/HTTPS, SMTP, etc. ③ Explain common HTTP methods used in API testing. GET: Retrieve data from the server. POST: Submit data to the server to create a resource. PUT: Update or replace an existing resource. DELETE: Remove a resource from the server. ④ What are the standard HTTP status codes, and what do they mean? 200: OK (Success). 400: Bad Request (Client Error). 401: Unauthorized (Authentication Needed). 500: Internal Server Error (Server Issue). ⑤ What is the difference between API Testing and Unit Testing? API Testing: Validates end-to-end business logic and data flow across systems. Unit Testing: Focuses on individual components of code. ⑥ Which tools are commonly used for API Testing? Postman: For manual testing and script automation. Rest Assured: Java-based library for automated API testing. SoapUI: Used for SOAP and REST API testing. ⑦ What are the different types of API authentication? OAuth: Token-based secure authentication. Basic Auth: Encoded username and password. API Key: Unique identifier to access APIs. ⑧ What are some best practices for writing API test cases? Define endpoint coverage. Test for valid and invalid inputs. Validate response status codes, headers, and payloads. Include edge case scenarios. ⑨ How do you handle errors in APIs? Validate error codes like 4xx (client errors) and 5xx (server errors). Ensure appropriate error messages are returned. Test scenarios for timeout and rate-limiting issues. ⑩ What is a Mock API, and why is it used? Mock APIs simulate the behavior of a real API, allowing testing when the actual API is unavailable or under development. Thanks Hassan #sqa #apitesting #interviewquestions #qajobsinlahore

Here are the 10 most commonly asked API Testing interview questions and answers: 1. What is API Testing? API Testing involves verifying application programming interfaces to ensure they meet functionality, reliability, performance, and security requirements. 2. What is the difference between REST and SOAP APIs? REST: Lightweight, uses JSON or XML, stateless, and works over HTTP/HTTPS. SOAP: Protocol-based, uses XML, supports stateful operations, and works over HTTP/HTTPS, SMTP, etc. 3. Explain common HTTP methods used in API testing. GET: Retrieve data from the server. POST: Submit data to the server to create a resource. PUT: Update or replace an existing resource. DELETE: Remove a resource from the server. 4. What are the standard HTTP status codes, and what do they mean? 200: OK (Success). 400: Bad Request (Client Error). 401: Unauthorized (Authentication Needed). 500: Internal Server Error (Server Issue). 5. What is the difference between API Testing and Unit Testing? API Testing: Validates end-to-end business logic and data flow across systems. Unit Testing: Focuses on individual components of code. 6. Which tools are commonly used for API Testing? Postman: For manual testing and script automation. Rest Assured: Java-based library for automated API testing. SoapUI: Used for SOAP and REST API testing. 7. What are the different types of API authentication? OAuth: Token-based secure authentication. Basic Auth: Encoded username and password. API Key: Unique identifier to access APIs. 8. What are some best practices for writing API test cases? Define endpoint coverage. Test for valid and invalid inputs. Validate response status codes, headers, and payloads. Include edge case scenarios. 9. How do you handle errors in APIs? Validate error codes like 4xx (client errors) and 5xx (server errors). Ensure appropriate error messages are returned. Test scenarios for timeout and rate-limiting issues. 10. What is a Mock API, and why is it used? Mock APIs simulate the behavior of a real API, allowing testing when the actual API is unavailable or under development. 🔗 Follow Sesadeb Das (Deb) for more insights and updates on Quality Assurance, automation testing, and tips to enhance software quality. hashtag #SoftwareTesting hashtag #FunctionalTesting hashtag #QA hashtag #TestingTypes hashtag #APITesting hashtag #QualityAssurance hashtag #UAT hashtag #RegressionTesting hashtag #BlackBoxTesting hashtag #WhiteBoxTesting hashtag #SmokeTesting hashtag #SoftwareDevelopment

🚀 What Kind of Work is API Testing? Performing the API testing is one of the most important ways of checking the reliability, performance, and security of applications. You can outline it simply this way: 1️⃣ What is api? An API is application that allows the communication between different software programs. Just imagine a telephone network, in this case the applications have a way of talking to one another. 2️⃣ Why Test the API? The API testing more specifically guarantees that the communication that was initiated is done properly and securely. It concentrates on the validation of business logic, data responses, performance and security. 3️⃣ Here is How API Testing is done: Setup: Specify endpoints, specify the request type (GET, POST and so on), specify headers and body. Send Requests: Make the demands of the API system that has been created and observe the response. Validate Responses: Examine the status code, data returned, headers, performance etc. Automate: Run these tests automatically with Postman, JUnit, Pytest and some others. 🔧 Instruments: Postman, SoapUI, JUnit, RestAssured and others. 4️⃣ Typical Tests: Functional Testing: Will the API achieve the intended purpose? Performance Testing: Does it have the capacity? Security Testing: Is it safe from invasions? Integration Testing: Does it integrate and function with other APIs well? 5️⃣ Useful Approaches: Do not combine tests and do not write the same test more than once and their results should be the same. Test both above and below the zero waterline. Use source control management for Test Scripts. Proficient API testing is one of the essential skills in the development of efficient contemporary software. #API #SoftwareTesting #Development #APITesting #Automation

Here are the 10 most commonly asked API Testing interview questions and answers: ① What is API Testing? API Testing involves verifying application programming interfaces to ensure they meet functionality, reliability, performance, and security requirements. ② What is the difference between REST and SOAP APIs? REST: Lightweight, uses JSON or XML, stateless, and works over HTTP/HTTPS. SOAP: Protocol-based, uses XML, supports stateful operations, and works over HTTP/HTTPS, SMTP, etc. ③ Explain common HTTP methods used in API testing. GET: Retrieve data from the server. POST: Submit data to the server to create a resource. PUT: Update or replace an existing resource. DELETE: Remove a resource from the server. ④ What are the standard HTTP status codes, and what do they mean? 200: OK (Success). 400: Bad Request (Client Error). 401: Unauthorized (Authentication Needed). 500: Internal Server Error (Server Issue). ⑤ What is the difference between API Testing and Unit Testing? API Testing: Validates end-to-end business logic and data flow across systems. Unit Testing: Focuses on individual components of code. ⑥ Which tools are commonly used for API Testing? Postman: For manual testing and script automation. Rest Assured: Java-based library for automated API testing. SoapUI: Used for SOAP and REST API testing. ⑦ What are the different types of API authentication? OAuth: Token-based secure authentication. Basic Auth: Encoded username and password. API Key: Unique identifier to access APIs. ⑧ What are some best practices for writing API test cases? Define endpoint coverage. Test for valid and invalid inputs. Validate response status codes, headers, and payloads. Include edge case scenarios. ⑨ How do you handle errors in APIs? Validate error codes like 4xx (client errors) and 5xx (server errors). Ensure appropriate error messages are returned. Test scenarios for timeout and rate-limiting issues. ⑩ What is a Mock API, and why is it used? Mock APIs simulate the behavior of a real API, allowing testing when the actual API is unavailable or under development. 🔗 Follow Sesadeb Das (Deb) for more insights and updates on Quality Assurance, automation testing, and tips to enhance software quality. #SoftwareTesting #FunctionalTesting #QA #TestingTypes #APITesting #QualityAssurance #UAT #RegressionTesting #BlackBoxTesting #WhiteBoxTesting #SmokeTesting #SoftwareDevelopment

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Here are the 10 most commonly asked API Testing interview questions and answers: 1. What is API Testing? API Testing involves verifying application programming interfaces to ensure they meet functionality, reliability, performance, and security requirements. 2. What is the difference between REST and SOAP APIs? REST: Lightweight, uses JSON or XML, stateless, and works over HTTP/HTTPS. SOAP: Protocol-based, uses XML, supports stateful operations, and works over HTTP/HTTPS, SMTP, etc. 3. Explain common HTTP methods used in API testing. GET: Retrieve data from the server. POST: Submit data to the server to create a resource. PUT: Update or replace an existing resource. DELETE: Remove a resource from the server. 4. What are the standard HTTP status codes, and what do they mean? 200: OK (Success). 400: Bad Request (Client Error). 401: Unauthorized (Authentication Needed). 500: Internal Server Error (Server Issue). 5. What is the difference between API Testing and Unit Testing? API Testing: Validates end-to-end business logic and data flow across systems. Unit Testing: Focuses on individual components of code. 6. Which tools are commonly used for API Testing? Postman: For manual testing and script automation. Rest Assured: Java-based library for automated API testing. SoapUI: Used for SOAP and REST API testing. 7. What are the different types of API authentication? OAuth: Token-based secure authentication. Basic Auth: Encoded username and password. API Key: Unique identifier to access APIs. 8. What are some best practices for writing API test cases? Define endpoint coverage. Test for valid and invalid inputs. Validate response status codes, headers, and payloads. Include edge case scenarios. 9. How do you handle errors in APIs? Validate error codes like 4xx (client errors) and 5xx (server errors). Ensure appropriate error messages are returned. Test scenarios for timeout and rate-limiting issues. 10. What is a Mock API, and why is it used? Mock APIs simulate the behavior of a real API, allowing testing when the actual API is unavailable or under development. 🔗 Follow Sesadeb Das (Deb) for more insights and updates on Quality Assurance, automation testing, and tips to enhance software quality. #SoftwareTesting #FunctionalTesting #QA #TestingTypes #APITesting #QualityAssurance #UAT #RegressionTesting #BlackBoxTesting #WhiteBoxTesting #SmokeTesting #SoftwareDevelopment

🔍 What is API Testing? API testing involves testing application programming interfaces (APIs) directly to ensure they meet functionality, reliability, performance, and security expectations. Unlike UI testing, which focuses on the application’s interface and user experience, API testing concentrates on the business logic layer of the software architecture. 🌟 Why is API Testing Important? 1. Early Detection of Issues: API testing allows issues to be identified and resolved early in the development cycle, reducing the cost and effort of fixing bugs later. 2. Language-Independent: Since APIs use standard protocols like HTTP/HTTPS, they can be tested using any programming language, making it versatile. 3. Improves Test Coverage: By testing APIs, you can achieve a higher level of test coverage compared to UI testing alone, ensuring that all aspects of your application’s functionality are working correctly. 4. Faster and More Efficient: API tests are generally faster to execute than UI tests, leading to quicker feedback and shorter development cycles. 🔧 Key Areas to Focus On: Functionality Testing: Ensures that the API performs as expected and handles errors gracefully. Load Testing: Assesses how well the API performs under heavy loads. Security Testing: Verifies that the API is secure from external threats and vulnerabilities. Validation Testing: Confirms that the API's response is correct and meets specified requirements. 🚀 Tools to Get Started: Postman: A powerful tool for testing APIs with an easy-to-use interface. SoapUI: Ideal for SOAP and REST API testing, offering both open-source and commercial versions. JMeter: A popular tool for load testing and performance measurement of APIs. 👨💻 Final Thoughts: Incorporating API testing into your testing strategy can significantly enhance the quality and reliability of your software. It’s an essential skill for any software quality assurance professional and a critical step towards delivering robust and scalable applications. What are your experiences with API testing? Share your thoughts and let's discuss how we can leverage these practices to build better software! 🚀 #SoftwareTesting #API #QualityAssurance #APITesting #SoftwareDevelopment #SQA

𝐅𝐮𝐧𝐜𝐭𝐢𝐨𝐧𝐚𝐥 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 𝐓𝐲𝐩𝐞𝐬: 1. 𝐒𝐲𝐬𝐭𝐞𝐦 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 System Testing is conducted on a complete, integrated system to evaluate the system's compliance with specified requirements. 2. 𝐁𝐥𝐚𝐜𝐤 𝐁𝐨𝐱 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 A testing technique that focuses on examining the functionality of an application based on the specifications, without peering into the internal workings. 3. 𝐑𝐞𝐠𝐫𝐞𝐬𝐬𝐢𝐨𝐧 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 Regression Testing ensures that recent code changes have not adversely affected existing features. 4. 𝐆𝐫𝐞𝐲 𝐁𝐨𝐱 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 A hybrid testing method that involves the tester having partial knowledge of the internal workings of the application. 5. 𝐑𝐞𝐭𝐞𝐬𝐭𝐢𝐧𝐠 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 Retesting involves re-executing test cases on the same version of the software after bugs have been fixed. 6. 𝐒𝐦𝐨𝐤𝐞 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 Smoke Testing is an initial check to determine if the build is stable enough for further testing. 7. 𝐔𝐧𝐢𝐭 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 A type of testing that involves testing individual units or components of a software application. 8. 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 Integration Testing focuses on verifying the interfaces and interactions between different modules of the application. 9. 𝐅𝐮𝐧𝐜𝐭𝐢𝐨𝐧𝐚𝐥 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 Functional Testing evaluates the system against the functional requirements and specifications. 10. 𝐔𝐬𝐞𝐫 𝐀𝐜𝐜𝐞𝐩𝐭𝐚𝐧𝐜𝐞 𝐓𝐞𝐬𝐭𝐢𝐧𝐠(UAT) UAT is the final phase of testing where actual users test the software to ensure it can handle required tasks in real-world scenarios. 11. 𝐂𝐨𝐦𝐩𝐨𝐧𝐞𝐧𝐭 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 Component Testing is the process of testing individual components of a software application. 12. 𝐀𝐝-𝐡𝐨𝐜/𝐑𝐚𝐧𝐝𝐨𝐦 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 Ad-hoc Testing is an informal testing type without any structured test cases. To uncover defects that might not be found using formal test cases. 13. 𝐀𝐜𝐜𝐞𝐩𝐭𝐚𝐧𝐜𝐞 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 Acceptance Testing determines whether a system meets the specified acceptance criteria. To decide whether the software is ready for deployment. 14. 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 Database Testing involves validating the integrity, consistency, and performance of a database. To ensure the accuracy of data storage and retrieval processes. 15. 𝐑𝐞𝐜𝐨𝐯𝐞𝐫𝐲 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 Recovery Testing assesses the system’s ability to recover from crashes, hardware failures, or other catastrophic issues. To validate the system’s robustness and reliability under adverse conditions. 16. 𝐖𝐡𝐢𝐭𝐞 𝐁𝐨𝐱 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 White Box Testing involves testing internal structures or workings of an application, as opposed to its functionality. ✨✨✨✨ 𝐒𝐨𝐟𝐭𝐰𝐚𝐫𝐞 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 ✨✨✨✨ [ #qa #testing #qspiders #tester #sdet #automation ]