Angular2 Set 2

Events: Click, submit ✘ XHR: Fetching date from remote server ✘ Timers: setTimeout(), setInterval() ✘ All of these ✔

A change-detection graph is a directed tree. ✘ Change detection is not predicatable. ✘ Change detection becomes stable after a single pass. ✘ Change detection generates VM-friendly code for better performance. ✔

Immutable objects are used ✘ Observables are used ✘ Component-change detection references are detached when not required ✘ All of these ✔

setter ✘ interface ✘ service ✘ constructor ✔

service ✘ controller module ✘ factory ✘ application module ✔

toHaveBeenCalledBefore ✘ toBeGoofy ✘ toBeFalsy ✘ toThrowError ✔

SpyStrategy ✘ Reporter ✘ matchers ✘ async-matchers ✔

$http is meant to make ajax calls that can fetch any data xml, json, images etc. ✘ $resource is meant for REST based calls (RESTFUL) ✘ $http internally uses $resource ✘ $resource internally uses $http ✔

While defining a controller ✘ While creating a link function for the custom directive ✘ Both A and B ✘ None of these ✔

Only to its child components ✘ Throughout all the components and their child components ✘ Within the component injector or in any of its child component ✘ Only to the root component ✔