Angular Interview Practice

What are pipes in Angular?

1. A method of component communication.

2. A way to transform data in the template.

3. Hooks for managing application state.

4. A type of directive in Angular.

The correct answer is: A way to transform data in the template.

Pipes in Angular serve as a powerful tool for transforming data directly within the template. They allow developers to format, filter, or manipulate data before it is displayed to the user, providing a clear and concise way to present information. For example, a pipe can be used to format a date into a more readable format, convert text to uppercase, or filter an array based on certain criteria. This transformation logic is reusable and can be easily applied to any data type in the Angular framework. The use of pipes enhances the separation of concerns by keeping the data transformation logic out of the component code and ensuring that the templates remain clean and simple to understand. Angular comes with built-in pipes like `DatePipe`, `CurrencyPipe`, and `DecimalPipe`, and developers can also create custom pipes to meet specific requirements. In contrast to the other choices, while methods of component communication (like services) facilitate interaction between different components, they are distinct from the functionality provided by pipes. Similarly, managing application state involves different techniques and concepts, rather than the transformation of data for display purposes. Lastly, while pipes can be thought of as a specialized tool within Angular, they are not classified as directives. Directives are used for manipulating the DOM, whereas pipes focus purely on