Postman Interview Questions and Answers
Freshers / Beginner level questions & answers
Ques 1. What is Postman?
Postman is a popular collaboration platform for API development. It simplifies the process of developing APIs by providing tools for testing, documenting, and sharing APIs.
Ques 2. Explain the difference between GET and POST requests.
GET requests are used to retrieve data from a server, while POST requests are used to submit data to be processed to a specified resource.
Ques 3. How do you add a header in a Postman request?
You can add a header in Postman by selecting the 'Headers' tab and then entering the key-value pairs for the headers you want to include.
Ques 4. What is a Postman collection?
A Postman collection is a group of saved requests. It allows you to organize your API requests into folders, making it easier to manage and run them in a sequence.
Ques 5. What are the benefits of using Postman over manual API testing?
Postman offers automation, repeatability, and collaboration benefits over manual API testing. It allows for efficient testing, documentation, and sharing of API workflows.
Ques 6. How can you organize and group requests in Postman?
Requests in Postman can be organized by using folders and subfolders. This helps in keeping related requests together and maintaining a structured workspace.
Intermediate / 1 to 5 years experienced level questions & answers
Ques 7. How do you parameterize requests in Postman?
You can parameterize requests in Postman by using variables. Variables can be defined in the request, collection, or environment levels.
Ques 8. Explain the purpose of Pre-request Scripts in Postman.
Pre-request Scripts in Postman allow you to execute custom JavaScript code before sending a request. It is useful for setting dynamic values or performing actions before the request is sent.
Ques 9. What is Newman in the context of Postman?
Newman is the command-line companion for Postman. It allows you to run and automate Postman collections using the command line.
Ques 10. How do you handle authentication in Postman?
Authentication in Postman can be handled by including the required credentials in the request headers or by using the built-in authentication methods provided by Postman.
Ques 11. What is the purpose of Postman environments?
Postman environments allow you to create sets of variables that can be used across requests. This is useful for managing different configurations, such as development and production.
Ques 12. How do you handle file uploads in Postman?
File uploads in Postman can be simulated using the 'form-data' request body type. You can select 'File' as a key and choose the file to upload.
Ques 13. What is the Postman Console, and how is it useful?
The Postman Console is a feature that displays logs and messages from requests and scripts. It is useful for debugging and understanding the flow of requests.
Ques 14. Explain the purpose of the 'pm.environment' object in Postman scripts.
'pm.environment' is an object in Postman scripts that allows you to access and manipulate variables at the environment level. It is useful for dynamic value assignments.
Ques 15. How do you handle dynamic variables in Postman?
Dynamic variables in Postman can be handled using environment variables, global variables, or by extracting data from responses and storing them for later use.
Ques 16. How can you pass data between requests in Postman?
Data can be passed between requests in Postman using variables. You can set variables in one request and use them in subsequent requests within the same collection.
Ques 17. Explain the purpose of the 'postman.setNextRequest' function.
'postman.setNextRequest' is used to specify the next request to be executed after the current one. It is helpful for creating a sequence of requests.
Ques 18. Explain the purpose of the 'pm.environment.clear' function.
'pm.environment.clear' is used to clear all variables in the current environment. It is helpful when you need to reset or clean up variables during script execution.
Ques 19. Explain the concept of Postman environments.
Postman environments allow you to create sets of variables that can be used across requests. This is useful for managing different configurations, such as development and production.
Experienced / Expert level questions & answers
Ques 20. Explain how you can share a Postman collection with others.
Postman collections can be shared by exporting them as a JSON file or by using the Postman API. You can also generate a public link to share the collection with others.
Ques 21. What is the purpose of the Postman test script?
The test script in Postman is used to write assertions and validations. It allows you to verify the response data and ensure that the API is behaving as expected.
Ques 22. How do you extract data from a response in Postman?
Data can be extracted from a response in Postman using the 'Tests' tab. You can write JavaScript code to extract and store values from the response.
Ques 23. Explain the difference between 'pm.test' and 'pm.expect' in Postman.
'pm.test' is used to define test cases in Postman scripts, while 'pm.expect' is used to set expectations for assertions. Both are used in the 'Tests' tab.
Ques 24. How can you handle time delays in Postman scripts?
Time delays can be handled in Postman scripts using the 'setTimeout' function. It allows you to introduce delays between requests or script executions.
Ques 25. Explain the concept of Postman monitors.
Postman monitors are used for automated and scheduled API testing. They allow you to run collections at predefined intervals and monitor API performance.
Ques 26. What is the Postman Sandbox?
The Postman Sandbox is a JavaScript execution environment within Postman. It allows you to write and run scripts for requests, tests, and pre-request scripts.
Ques 27. How can you handle errors in Postman scripts?
Errors in Postman scripts can be handled using try-catch blocks. This allows you to catch and manage errors, preventing them from affecting the entire script execution.
Ques 28. What is the purpose of the 'pm.sendRequest' function in Postman?
'pm.sendRequest' is used to send an HTTP request from within a Postman script. It allows you to make additional requests based on the results of the current request.
Ques 29. How do you handle CSRF tokens in Postman?
CSRF tokens in Postman can be handled by extracting them from responses and including them in subsequent requests using variables.
Ques 30. How do you handle data-driven testing in Postman?
Data-driven testing in Postman can be achieved by using data files, such as CSV or JSON, to provide different sets of input data for the same request or collection of requests.
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