Angular Developer Interview Questions

1,434 angular developer interview questions shared by candidates

Q: What are Angular lifecycle hooks, and can you explain ngOnInit and ngOnDestroy with examples? Q: How do you implement lazy loading in Angular, and why is it useful? Q: What are Observables in RxJS, and how do you handle error handling in HTTP requests? Q: Can you explain difference between template-driven and reactive forms? Q: How do you optimize Angular application performance?
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Angular UI Developer

Interviewed at Cognizant

3.1
Sep 15, 2025

Q: What are Angular lifecycle hooks, and can you explain ngOnInit and ngOnDestroy with examples? Q: How do you implement lazy loading in Angular, and why is it useful? Q: What are Observables in RxJS, and how do you handle error handling in HTTP requests? Q: Can you explain difference between template-driven and reactive forms? Q: How do you optimize Angular application performance?

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