Bird
0
0

Why is it recommended to inject services into Angular components rather than creating service instances manually inside the component?

easy🧠 Conceptual Q1 of 15
Angular - Services and Dependency Injection
Why is it recommended to inject services into Angular components rather than creating service instances manually inside the component?
ATo enable Angular's dependency injection system to manage service lifecycles and promote reusability
BBecause manually creating services inside components improves performance
CTo avoid importing the service class in the component file
DBecause Angular components cannot instantiate classes directly
Step-by-Step Solution
Solution:

  1. Step 1: Understand Angular DI

    Angular's dependency injection (DI) system manages service instances and their lifecycles.

  2. Step 2: Benefits of DI

    Injecting services allows sharing instances, easier testing, and consistent state management.

  3. Final Answer:

    To enable Angular's dependency injection system to manage service lifecycles and promote reusability -> Option A

  4. Quick Check:

    DI manages instances and promotes reusability [OK]
Quick Trick: Use DI to share and manage service instances [OK]
Common Mistakes:
MISTAKES
  • Thinking manual instantiation improves performance
  • Believing services don't need to be imported
  • Assuming components cannot create instances

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions
More Angular Quizzes
Angular Change Detection - Why change detection matters - Quiz 11easy HTTP Client - Setting headers and params - Quiz 15hard HTTP Client - PUT and DELETE requests - Quiz 8hard Reactive Forms - Form state tracking (dirty, touched, valid) - Quiz 9hard Reactive Forms - Reactive forms vs template forms decision - Quiz 11easy Routing - Lazy loading modules with routes - Quiz 6medium RxJS and Observables Fundamentals - Creating observables - Quiz 14medium Services and Dependency Injection - @Injectable decorator and providedIn - Quiz 3easy Services and Dependency Injection - Service scope (root, module, component) - Quiz 4medium Template-Driven Forms - Form submission handling - Quiz 13medium