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Explain Angular Lifecycle Hooks and why they matter.

Junior Angular
Quick Answer Angular lifecycle: constructor (DI), ngOnChanges (input changes), ngOnInit (initialization, data fetch), ngDoCheck (custom change detection), ngAfterContentInit/Checked (projected content), ngAfterViewInit/Checked (view children ready), ngOnDestroy (cleanup). ngOnInit is where you fetch initial data. ngOnDestroy is where you unsubscribe all Observables to prevent memory leaks.

Answer

Lifecycle hooks are special methods Angular calls during component creation, update, and destruction.

They help with initialization, loading data, reacting to input changes, accessing the DOM, and cleaning up resources.

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SugharaIQ Editorial Team Verified Answer

This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.

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