Environment variables in Postman - Cheat Sheet & Quick Revision

Recall & Review

beginner

What are environment variables in Postman?

Environment variables in Postman are placeholders that store values you can reuse in your requests, like URLs or tokens. They help you run tests in different setups without changing the request manually.

beginner

How do you create an environment variable in Postman?

You create an environment variable by opening the Environment quick look, clicking 'Add', then entering a variable name and value. Save it to use in your requests with {{variable_name}} syntax.

beginner

Why use environment variables instead of hardcoding values?

Using environment variables lets you switch between different setups easily, like testing on development or production servers, without changing each request manually. It saves time and reduces errors.

beginner

How do you reference an environment variable in a Postman request?

You reference an environment variable by wrapping its name in double curly braces, like {{variable_name}}. Postman replaces this with the variable's value when sending the request.

intermediate

What happens if an environment variable is not set in Postman?

If an environment variable is not set, Postman will send the request with the variable name as is (like {{variable_name}}), which usually causes the request to fail or behave unexpectedly.

What is the correct syntax to use an environment variable named 'baseUrl' in a Postman request?

A [baseUrl]

B {{baseUrl}}

C $baseUrl

D <baseUrl>

In Postman, environment variables are referenced using double curly braces like {{baseUrl}}.

Why should you use environment variables in Postman?

A To reuse values and switch environments easily

B To hardcode values permanently

C To slow down requests

D To avoid saving requests

Environment variables let you reuse values and switch between environments like development and production without changing requests manually.

Where do you manage environment variables in Postman?

A In the Headers tab

B In the Body tab

C In the Console

D In the Environment quick look or Manage Environments

You manage environment variables in Postman using the Environment quick look or the Manage Environments section.

What happens if you use an environment variable that is not defined?

A Postman replaces it with an empty string

B Postman ignores the request

C Postman replaces it with the variable name as is

D Postman throws an error and stops

If an environment variable is not defined, Postman sends the request with the variable name like {{variable_name}}, which usually causes errors.

Can environment variables store sensitive data like API keys in Postman?

A Yes, but use Postman's secret environments for security

B No, environment variables cannot store sensitive data

C Yes, and they are always encrypted

D No, you must hardcode sensitive data

Environment variables can store sensitive data, but it's best to use Postman's secret environments or other secure methods to protect them.

Explain what environment variables are in Postman and why they are useful.

Think about how you can test the same API on different servers without changing each request.

Describe how to create and use an environment variable in a Postman request.

Focus on the steps from creating to referencing the variable.