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What will happen if a component is declared in two different Angular modules?

medium📝 Predict Output Q5 of 15
Angular - Modules
What will happen if a component is declared in two different Angular modules?
AAngular will throw a compilation error.
BThe component will be shared automatically between modules.
CThe component will only belong to the first module loaded.
DThe component will be duplicated in both modules without error.
Step-by-Step Solution
Solution:

  1. Step 1: Recall Angular's rule on declarations

    A component can only be declared in one module to avoid conflicts.

  2. Step 2: Understand Angular's behavior on duplicate declarations

    If declared in two modules, Angular throws a compilation error to prevent ambiguity.

  3. Final Answer:

    Angular will throw a compilation error. -> Option A

  4. Quick Check:

    Component declared once only [OK]
Quick Trick: Declare components in only one module [OK]
Common Mistakes:
  • Thinking components can be declared multiple times
  • Assuming Angular merges declarations silently
  • Confusing declarations with exports

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