INTERVIEW QUESTIONS

Angular Interview Questions

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Showing 2 Angular Signals practice prompts

ANGULAR

What are Angular Signals and what advantages do they offer over Zone.js?

Angular Signals (`signal()`, `computed()`, `effect()`) provide fine-grained reactivity. Unlike Zone.js which monkey-patches asynchronous browser APIs and triggers broad component subtree checks, Signals create an explicit reactive dependency graph. When a signal value updates, Angular knows the exact dependent template nodes requiring DOM updates, laying the foundation for zoneless rendering.

◦ signals

ANGULAR

Explain the internal reactive graph of Angular Signals: Glitch-free execution and push-pull dynamics.

Angular Signals use a push-pull reactive algorithm. When a source `signal()` changes, it 'pushes' dirty flags down the dependency graph to invalidate cached nodes without immediately evaluating them. When a consumer (such as a template or `computed()`) reads the value, it 'pulls' updates only if dirty flags exist. This prevents 'glitches' (temporary inconsistent intermediate states seen in diamond-shaped dependency graphs) and ensures computations are lazy and executed exactly once per change.

◦ signals

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