Angular Interview Practice

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What will be the output of the following expression: {{ 'hello' | uppercase }}?

  1. HELLO

  2. Hello

  3. hello

  4. HeLLo

The correct answer is: HELLO

The expression uses Angular's built-in pipe for text transformation, specifically the uppercase pipe. When the string 'hello' is passed through this pipe, it converts all lowercase letters in the string to uppercase. In this case, 'hello' is transformed to 'HELLO', resulting in the output being fully capitalized. The uppercase pipe is particularly useful in Angular as it can dynamically format text in a user interface, enhancing readability or matching visual design requirements. This functionality to convert text to uppercase without any additional logic or code makes it a succinct option for handling string transformations in templates.

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