Angular Expert — Series 2

Preview — 3 of 10 questions

An app runs with provideZonelessChangeDetection(). Which statement is true?

javascript

count.set(1);              // signal write — notifies
cdr.markForCheck();        // explicit
// async pipe emission, host listener, template event — all notify

AChange detection no longer exists; templates re-render on every frame

BOnly signals can update a view — async pipe bindings stop working

Czone.js no longer patches async APIs, so nothing schedules change detection implicitly. Angular relies on explicit notifications instead: signal writes, markForCheck, async pipe emissions, host listeners

DComponents must all be OnPush, or the app throws at bootstrap

What does calling tick() manually do?

AIt runs change detection synchronously over all dirty views, from the roots down — useful in tests and rare integrations, and a smell in application code

BIt re-renders every view, dirty or not, ignoring OnPush

CIt is a no-op without zone.js

DIt schedules a check for the next animation frame

A component injects a token provided in a route's providers. Which injector resolves it, and what happens if it is missing there?

AThe node injector only; route providers are node-level

BNeither — route providers are only visible to guards and resolvers

CThe root injector always, because route providers are merged into it at bootstrap

DThe lookup walks the node injector chain (the component's element and its ancestors' providers/viewProviders) and, when that is exhausted, continues into the environment injector chain — where route-level providers live, before the root environment injector

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