You want to display a user's full name in Angular using interpolation, but the component only has firstName and lastName properties. Which template code correctly shows the full name?

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Angular - Templates and Data Binding

You want to display a user's full name in Angular using interpolation, but the component only has firstName and lastName properties. Which template code correctly shows the full name?

A<code>{{ firstName + ' ' + lastName }}</code>

B<code>{{ firstName & ' ' & lastName }}</code>

C<code>{{ firstName.concat(' ', lastName) }}</code>

D<code>{{ firstName | lastName }}</code>

Step-by-Step Solution

Solution:

Step 1: Understand string concatenation in interpolation
Angular interpolation supports JavaScript expressions, so you can use + to join strings.
Step 2: Evaluate each option's correctness
{{ firstName + ' ' + lastName }} uses + to join firstName, a space, and lastName correctly.
{{ firstName & ' ' & lastName }} uses & which is invalid in JavaScript.
{{ firstName.concat(' ', lastName) }} tries to call concat on firstName, which is valid JavaScript but may cause errors if firstName is undefined.
{{ firstName | lastName }} uses a pipe which is for Angular pipes, not string concatenation.
Final Answer:
{{ firstName + ' ' + lastName }} -> Option A
Quick Check:
Use + to join strings inside {{ }} [OK]

Quick Trick: Use + to join strings inside {{ }} for full names [OK]

Common Mistakes:

Using & instead of + for concatenation
Misusing pipes for string joining
Calling methods that may not exist safely

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More Angular Quizzes

You want to display a user's full name in Angular using interpolation, but the component only has firstName and lastName properties. Which template code correctly shows the full name?

Step 1: Understand string concatenation in interpolation

Step 2: Evaluate each option's correctness

Final Answer:

Quick Check:

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