Interview Q&A

Master technical and career interviews with structured answers—short definition, real examples, pitfalls, and how to answer in 60–90 seconds.

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What is dependency injection in Angular?

Short answer: ngular has a built-in DI system that allows services to be injected into components or other services. constructor(private authService: AuthService) {} Real-Time Example: In an e-commerce app: Inject CartSe…

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Angular Angular Tutorial · Angular

Short answer: ngular has a built-in DI system that allows services to be injected into components or other services. constructor(private authService: AuthService) {} Real-Time Example: In an e-commerce app: Inject CartService into CartComponent to manage cart items.

Real-world example (ShopNest)

A shared CartService is injected into header and product pages so both see the same cart count.

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Define — one clear sentence (the short answer above).
Example — relate it to a project like ShopNest or your real work.
Trade-off — when you would not use it.

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Interview Q&A

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Real-world example (ShopNest)

Say this in the interview