Angular Web Framework HTTP Client & API Integration

Question 1

Which Angular module must be imported into AppModule to enable HttpClient throughout an application?

Accepted Answer

HttpClientModule

Answer

HttpClientModule (from @angular/common/http) registers the HttpClient service and must be imported in AppModule or a shared module.

Question 2

What return type does HttpClient.get() produce by default?

Accepted Answer

Observable<T>

Answer

HttpClient.get() returns an Observable<T> that emits the parsed response body once the request completes.

Question 3

What is the primary purpose of an HttpInterceptor in Angular?

Accepted Answer

To intercept and transform HTTP requests and responses globally

Answer

HttpInterceptor sits in the request pipeline and lets you add headers, log calls, handle errors, or modify responses globally.

Question 4

Which HttpClient request option causes it to return the full HTTP response including status code and headers?

Accepted Answer

observe: 'response'

Answer

Setting observe: 'response' returns an HttpResponse<T> object containing the status, headers, and parsed body.

Question 5

How do you pass query string parameters to an HttpClient.get() request in Angular?

Accepted Answer

Use the params option with an HttpParams object or plain object

Answer

The params option accepts an HttpParams instance or a plain key-value object that Angular safely encodes and appends to the URL.

Angular Web Framework Practice Test