Are you preparing for the Postman interview? If yes, go through this post and find out all the latest Postman interview questions. Whether you're a beginner or a professional, referring to these questions will help you prepare well.
Postman was developed to streamline the problems of the API testing process. However, now, it has become one of the most popular collaboration platforms used in developing, testing, and API design.
Keeping in mind the progress this tool has undergone all these years, many professionals are looking forward to developing their careers with this technology. If you're one from the lot, this post covers some of the latest Postman interview questions for freshers and experienced. Let's have a look ahead.
Postman is an HTTP Client-based software application primarily used to test APIs. It allows you to test HTTP requests using a GUI (Graphical User Interface) that may be run and the results checked. It also facilitates API development collaboration among team members by offering a platform for designing, developing, testing, and documenting APIs.
In Postman, a collection is used to organise requests that are related. It aids in the organisation of requests into folders in an organised manner.
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Postman is used for the following reasons:
Postman accepts only Base64-encoded permission credentials. Postman comes with it by default. If we don't want to use the built-in encoding system, we can use third-party websites to convert the credentials to base64 format.
Global variables have a global scope that is limited to the workspace. As a result, global scope variables cannot have the same names. Local variables can have the same names, but they must be part of different variables.
Monitoring is a technique for keeping track of the health and performance of APIs. Postman has built-in monitoring capabilities that help us stay on top of API development and performance.
Postman's monitors are primarily focused on the operation of collection runners. They run each request in the collection and look at the values in the test scripts. The monitors use the test scripts to validate and track the replies. The reports generated are shared with the developers via emails or alerts in Slack, Hipchat, and other platforms based on our configuration choices.
The binary form is intended to assist in transmitting data in a format that cannot be entered manually. These options are used for submitting large files in a POST request, such as photos, CSV files, etc. The most straightforward encoding for sending complex data with the request is binary.
Base64 encoding is widely used because it allows data to be transmitted in a textual format that is easier to send in HTML form statistics requests. Another reason we utilise this is that encoding with identical 64 characters is quite reliable in any language.
NOT MODIFIED is the 304 status code. In the case of limited GET queries, this is used to reduce the network's bandwidth. In such circumstances, the response body should be empty or blank, and the headers should include information such as the date, location, and signature, among other things.
Because of the required privacy and security, it is not recommended that we store our work on the Postman cloud when working on enterprise-level applications for enterprises. A skilled hacker has the potential to compromise the security of the Postman cloud.
The following variable scopes are available in Postman:
Yes, it's conceivable. It is possible to create a collection, add all requests with the same authentication token, and then assign the authentication token to the collection. Select the "Inherit auth from parent" option on the Authorization tab to apply this to individual requests.
Workspaces are Postman-provided areas/spaces for teams to collaborate on a specific set of collections. It allows you to logically divide requests or collections exclusive to a developer or team, making request administration accessible.
In Postman, there are two sorts of workspaces:
By publishing the users' email addresses, we can encourage new users to collaborate on our collections. After accepting the invitation, new users can begin contributing to the workspace by adding or changing requests.
Scratch Pad is a Postman-provided workspace that allows us to operate without relying on Postman servers. It allows you to use some of Postman's capabilities when you're not connected to the internet. The features include creating collections, creating requests, and submitting requests. These are saved locally, and the work is saved into the workspace once you log in.
Postman supplies the Newman command-line tool, which can be used to run any Postman collection. It's a NodeJS-based package that uses Newman Collection Runner to execute collections. It is fully compatible with Postman's Collection Runner, which means it may run assertions, pre-request scripts, and other request scripts tied to the collection's requests.
Newman can be used by following the procedures below:
newman run {{path to collection json}} -e {{path to environment json}}
If you want to create numbers in the range of 1 to N, you can do so as follows in the pre-request script:
pm.globals.set('randomnumber, Math.floor (Math.random() N));
We can then utilise this variable in the URL as
{{randomNumber}}
Postman provides the Digest Authorisation method as one of its authorization options. The client sends the request to the API first, and the server responds with a number that can only be used once a realm value and a 401 unauthorised response code. After that, we'll receive an encrypted data array including both the username and password and the previously obtained data from the server. The server generates an encrypted data string from this information and compares it to what was sent to authenticate the request.
This can be done by going to the Authorization tab and selecting "Digest Auth" from the drop-down menu. The fields for both stages of the authentication request are displayed in the Postman window. Based on the data received from the server, the fields required for the second step of the request are auto-filled.
Related Article - What is API Testing |
Application Programming Interface is an abbreviation that stands for Application Programming Interface. API stands for Application Programming Interface, and it is a set of routines, protocols, and tools for creating software applications. APIs define how one piece of software should communicate with another.
API stands for Application Programming Interface in basic terms. API serves as a connection point between two software applications, allowing them to communicate. A programming interface (API) is a set of software capabilities that another application can use.
An HTTP request consists of five main components:
In Postman, Basic Auth is an authentication method that allows HTTP user agents such as web browsers to enter a username and password. Once you enter the login and password, it is paired with the request.
The only codec supported by Postman is Base64. This is built-in to Postman, or you can use third-party websites to convert your credentials to base64.
We utilise base64 because it converts data into text and sends it more straightforwardly, such as HTML form data. We can also rely on the same 64 characters in any encoding language.
Global variables cannot have duplicate names because they are global; they exist outside of any environment. The names of local variables can be the same in multiple settings.
Individual requests can be grouped in a Postman Collection. Simply put, it enables us to categorise requests into folders.
Collections are run using the postman monitor. Collections are run until the user specifies a time limit. The user must be logged in to utilise Postman Monitor. Users provide daily/monthly monitoring reports to each other via email.
Related Article - Postman Tutorial |
A Postman cloud is a centralised location where businesses can access Postman collections. Work can be stored instantaneously in the Postman cloud after logging in. Anyone on the team has access to data and collections from any location.
It is not recommended that you save your work in the Postman cloud since company work cannot be leaked and must remain confidential. If Postman cloud is used, security breaches may occur since Postman cloud requires sign-in. As a result, saving work on Postman Cloud is discouraged, while team workspace is highly encouraged.
In a Collection run, pre-request scripts at the Collection level are executed first.
GUID, Lodash, Moment
The term GUID refers to a globally unique identifier. Hyphens separate hexadecimal digits in this format. GUID satisfies the requirement for uniqueness.
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Madhuri is a Senior Content Creator at MindMajix. She has written about a range of different topics on various technologies, which include, Splunk, Tensorflow, Selenium, and CEH. She spends most of her time researching on technology, and startups. Connect with her via LinkedIn and Twitter .