Infosys Angular Interview Questions for 5 years
Shared question set for 5 years of experience, First round. Topics and wording follow the supplied notes; these are questions, not official company guidance.
- What are pure functions in JavaScript and where have you used them in Angular projects?
- What is a callback function?
- Explain Promise and async/await.
- Explain the event loop with synchronous and asynchronous code.
- Explain the spread operator and destructuring.
- Write code to find missing numbers from an array like [1,2,4,5,7,8,9].
- What new features have been introduced from Angular 17 to the latest versions?
- Signals vs Observables: are Signals a replacement for RxJS?
- What are effects in Signals?
- What are computed Signals with a real-time use case?
- How do @Input, @Output and @ViewChild work with Signals? Explain linkedSignal and the use of untracked.
- How does change detection work with Signals (no dependency on zone.js)?
- How do you store API response data in Angular (Signals vs normal variables)?
- Explain change detection.
- What are Angular performance optimization techniques?
- What is the BEM model in CSS?
- Do you have working experience with SCSS?
- Migration from Angular 12 to newer versions: what steps will you follow?
- Accessibility: do you have working experience? Have you used the Lighthouse tool?
- How do you handle large data using pagination (API-based)?
- What are state management approaches and the basics of NgRx?
- Are you using an AI tool to write test cases?
- Are you familiar with libraries like AG Grid?