input() and input.required() in Angular
Angular interview exercise on Inputs & outputs, difficulty 1 of 3. Solve it in the editor beside a worked example, or cold in Interview mode with the example hidden; the tests run the moment you do.
Give GreetingComponent three inputs: `name` (required), `greeting` defaulting to "Hello" and `excited` defaulting to false. Render "<greeting>, <name>" in a <p>, ending with "!" when excited and "." otherwise.
Each exercise pairs a worked example with a twin problem to solve in a real editor; the tests run the moment you do. Interview mode hides the example: solve it from memory, without the hint or the solution, and it counts as solved cold. Progress is saved in your browser, and in your account if you sign in.