Angular Web Framework State Management & Change Detection

Question 1

Which Angular strategy checks only the current component and its ancestors when an input reference changes?

Accepted Answer

OnPush

Answer

Default

Answer

Detached

Answer

Manual

Question 2

What method on ChangeDetectorRef temporarily stops change detection for a component subtree?

Accepted Answer

detach()

Answer

markForCheck()

Answer

detectChanges()

Answer

reattach()

Question 3

Which NgRx building block is a pure function that takes the current state and an action, and returns a new state?

Accepted Answer

Reducer

Answer

Effect

Answer

Selector

Answer

Action

Question 4

In NgRx, which construct handles side effects such as HTTP calls and dispatches new actions on completion?

Accepted Answer

Effect

Answer

Reducer

Answer

Selector

Answer

Store

Question 5

Which NgRx function creates a memoized, reusable piece of state-derived data?

Accepted Answer

createSelector()

Answer

createAction()

Answer

createReducer()

Answer

createEffect()

Question 6

What does calling markForCheck() on a component using OnPush change detection do?

Accepted Answer

Marks the component and its ancestors to be checked on the next cycle

Answer

Immediately runs change detection

Answer

Detaches the component from the tree

Answer

Reattaches a detached component