Answer
forRoot creates the global router services.
forChild adds child routes without recreating router instances.
forChild adds child routes without recreating router instances.
Quick Answer
RouterModule.forRoot() registers the Router service and root routes - call once in AppModule. RouterModule.forChild() registers additional routes for a lazy feature module without re-providing the Router service. Calling forRoot() in a lazy module would create a second Router instance and break routing. Feature modules always use forChild().
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ