Angular 21 Tutorial in Hindi #50 | API Data Type & Interface | Type vs Interface in TypeScript

Published: 15 January 2026
on channel: Code Step By Step
2,668
50

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In this video, we cover Angular 21 Tutorial Part 50, where you’ll learn how to properly define data types and interfaces for API responses in Angular using TypeScript.

In the previous part, we called an API using an Angular Service but used any as the data type. In this tutorial, we fix that by creating strongly typed interfaces for large API response objects.

What you will learn in this video:
What is an Interface in TypeScript
Why any should be avoided in Angular projects
How to create Interfaces for API response data
Handling large and nested API objects
Exporting and reusing Interfaces across files
Difference between Type and Interface (Interview perspective)
Interface Merging and Extend concept
Best practices for Angular Service data typing
This video is very important for Angular & TypeScript interviews and real-world project development.

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