Bird
0
0

What is wrong with this component selector definition? selector: 'app component'

medium📝 Debug Q6 of 15
Angular - Components
What is wrong with this component selector definition? selector: 'app component'
ASelector must start with a capital letter.
BSelector contains a space which is invalid in Angular selectors.
CSelector cannot contain the word 'component'.
DSelector must be enclosed in square brackets.
Step-by-Step Solution
Solution:

  1. Step 1: Check selector syntax rules

    Angular selectors must be valid CSS selectors; spaces are not allowed in tag or attribute selectors.

  2. Step 2: Analyze the given selector

    The selector 'app component' has a space, making it invalid. Other options are incorrect rules.

  3. Final Answer:

    Selector contains a space which is invalid in Angular selectors. -> Option B

  4. Quick Check:

    Spaces not allowed in selectors [OK]
Quick Trick: No spaces allowed in selectors [OK]
Common Mistakes:
  • Thinking spaces are allowed in selectors
  • Assuming selector must start uppercase

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions
More Angular Quizzes
Angular Fundamentals - How Angular bootstraps an application - Quiz 5medium Component Interaction - @ContentChild and content projection - Quiz 2easy Directives - Directive execution and DOM manipulation - Quiz 11easy Lifecycle Hooks - ngDoCheck for custom change detection - Quiz 13medium Lifecycle Hooks - ngOnDestroy for cleanup - Quiz 13medium Pipes - Parameterized pipes - Quiz 12easy Pipes - Parameterized pipes - Quiz 15hard Templates and Data Binding - Two-way binding with ngModel - Quiz 1easy Templates and Data Binding - Interpolation with double curly braces - Quiz 15hard Templates and Data Binding - Why data binding matters - Quiz 11easy