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Angular Developer Interview Questions

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1,605 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

4★
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?

Technical Questions: What is meta in HTML? What is HOC? What is Redux? Tell me what are React hooks All React and HTML realted questions basically. Task is given to complete the challenge in Codepen: Print the dates between the start date and End dates in JS
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Graduate React/Angular Developer

Interviewed at Cognizant

4★
Sep 13, 2021

Technical Questions: What is meta in HTML? What is HOC? What is Redux? Tell me what are React hooks All React and HTML realted questions basically. Task is given to complete the challenge in Codepen: Print the dates between the start date and End dates in JS

The technical interview includes questions as: 1. Lifecycle of angular 2. Directives and it's types 3. Building block of angular component 4. Closure & hoisting 5. Difference between let,const and var 6. Write a javascript function where it takes an array as input and return output as most repeated element. Example-- input -- arr=[1,2,3,2,4,2,2] output- 2 In the next managerial round of interview, general behavioral questions.
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Angular Developer

Interviewed at Genpact

3.7★
Feb 21, 2025

The technical interview includes questions as: 1. Lifecycle of angular 2. Directives and it's types 3. Building block of angular component 4. Closure & hoisting 5. Difference between let,const and var 6. Write a javascript function where it takes an array as input and return output as most repeated element. Example-- input -- arr=[1,2,3,2,4,2,2] output- 2 In the next managerial round of interview, general behavioral questions.

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