Interview Questions and Answers

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.

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.

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.

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.

Postman offers automation, repeatability, and collaboration benefits over manual API testing. It allows for efficient testing, documentation, and sharing of API workflows.

Requests in Postman can be organized by using folders and subfolders. This helps in keeping related requests together and maintaining a structured workspace.

You can parameterize requests in Postman by using variables. Variables can be defined in the request, collection, or environment levels.

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.

Newman is the command-line companion for Postman. It allows you to run and automate Postman collections using the command line.

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.

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.

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.

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.

'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.

Dynamic variables in Postman can be handled using environment variables, global variables, or by extracting data from responses and storing them for later use.

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.

'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.

'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.

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.

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.

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.

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.

'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.

Time delays can be handled in Postman scripts using the 'setTimeout' function. It allows you to introduce delays between requests or script executions.

Postman monitors are used for automated and scheduled API testing. They allow you to run collections at predefined intervals and monitor API performance.

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.

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.

'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.

CSRF tokens in Postman can be handled by extracting them from responses and including them in subsequent requests using variables.

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.