Lifecycle hooks in angular

Question

Accepted Answer

Lifecycle hooks are functions that allow you to tap into specific moments in the Angular lifecycle.

There are eight lifecycle hooks in Angular: ngOnChanges, ngOnInit, ngDoCheck, ngAfterContentInit, ngAfterContentChecked, ngAfterViewInit, ngAfterViewChecked, ngOnDestroy
ngOnChanges is called when an input property changes
ngOnInit is called once the component is initialized
ngDoCheck is called during every change detection cycle
ngAfterContentInit is called after content is projected into the component
ngAfterContentChecked is called after every check of projected content
ngAfterViewInit is called after the component's view has been initialized
ngAfterViewChecked is called after every check of the component's view
ngOnDestroy is called just before the component is destroyed
Lifecycle hooks can be used to perform actions such as initializing data, detecting changes, and cleaning up resources

Top Cognizant Application Developer interview questions & answers