What is XML used for?

• A. To create APIs
• B. To store and transport data
• C. To format images
• D. To compile code

Answer: (B)

XML, or eXtensible Markup Language, is primarily utilized for storing and transporting data. It is designed to be a flexible way to create information formats and transfer structured data over the internet. By defining a set of rules for encoding documents in a format that is both human-readable and machine-readable, XML allows data to be easily shared and understood across different systems, platforms, and applications.

The structure of XML allows it to define custom tags that enhance the data's context, making it a powerful tool for representing complex data structures. Its widespread use is evident in various applications, including web services, configuration files, and data exchange protocols, where clarity and interoperability are key.

While APIs can use XML for data exchange, especially in RESTful services, XML itself is not specifically created for the purpose of APIs. Similarly, formatting images is outside the scope of XML, which is primarily text-based, and compiling code pertains to programming languages and their environments, again not related to XML's functionality. Thus, the characteristic of XML that emphasizes its role in storing and transporting data is fundamental to its design and purpose.