Which of the following statements is correct?

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Question

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Beltron Programmer 1 Oct 2023 Official Paper

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XML cannot be used for interprocess communication.
It is possible to create custom tags in XML.
If we are to use XML in a browser-based application we will first have to create XML reader writer classes.
XML tags cannot be nested

Answer 1

The correct answer is Option 2) It is possible to create custom tags in XML..

Key Points

XML (eXtensible Markup Language) allows users to define their own custom tags that describe the data meaningfully.
This flexibility is what makes XML powerful for data storage, transfer, and configuration.
Unlike HTML, which has predefined tags, XML enables you to create tags that fit the context of your application — e.g., <student><name>John</name></student>.
This makes XML widely used for configuration files, data interchange formats (e.g., between server and client), and more.

Additional Information

Option 1 – Incorrect: XML can be used for interprocess communication, especially in web services and APIs (e.g., SOAP uses XML).
Option 3 – Incorrect: Browsers already have built-in XML parsers. You don’t always need to create custom XML reader/writer classes.
Option 4 – Incorrect: XML supports nesting of tags. In fact, proper nesting is required for XML to be well-formed.
Key features of XML:
- Custom tags
- Hierarchical structure with nesting
- Platform-independent data exchange
- Strict syntax rules (must be well-formed)