Q. Can resolvers be combined with caching?
Yes, you can store data in a service or state management library (NgRx/Akita) so resolvers don’t re-fetch unnecessarily.
Q. How do you handle errors in resolvers?
You can catch HTTP errors inside the resolver and redirect users to an error page or show a fallback message.
Q. How do you implement a resolver in Angular?
Create a service that implements Resolve<T> interface and fetch data (e.g., via HttpClient). Then attach it to a route with resolve: { data: MyResolver }.
Q. How do resolvers improve user experience?
They prevent empty or loading states by ensuring data is ready before rendering, reducing flicker and unnecessary spinners.
Q. What is an Angular Resolver?
Resolvers are Angular services that fetch necessary data before a route is activated, ensuring the view loads with pre-fetched data.
Q. What are pitfalls to avoid with DI?
Overusing DI for trivial dependencies Mismanaging bean scopes (singleton vs prototype) Creating complex dependency graphs without documentation
Q. Can DI be done without frameworks?
Yes, by manually injecting dependencies via constructors or setters, though frameworks automate this process.
Q. Which frameworks provide DI in Java?
Popular ones are Spring, Google Guice, and CDI (Contexts and Dependency Injection for Java EE).
Q. Why does DI improve clean code practices?
It reduces tight coupling, improves maintainability, and allows mocking in unit tests.
Q. What is dependency injection (DI)?
DI is a design pattern where dependencies are provided to a class from outside, rather than being created internally, making code more testable and modular.