Q: viewChild() signal queries vs @ViewChild decorator — what changed?

**Target Audience:** Developers who know @ViewChild and @ContentChild and are moving a codebase to signal-based APIs. **Difficulty:** Medium > **How to read this doc:** Plain language first, then 📌 Interview term: callouts. Types and status come from the installed Angular 22.2.3 typings; behaviour, error codes and compiled output come from running ngc and the compiled app. Version history is cited inline. ## 1. Why This Even Matters — A Stor

Question 1

viewChild() signal queries vs @ViewChild decorator — what changed?

Accepted Answer

**Target Audience:** Developers who know @ViewChild and @ContentChild and are moving a codebase to signal-based APIs. **Difficulty:** Medium > **How to read this doc:** Plain language first, then 📌 Interview term: callouts. Types and status come from the installed Angular 22.2.3 typings; behaviour, error codes and compiled output come from running ngc and the compiled app. Version history is cited inline. ## 1. Why This Even Matters — A Stor

Question 2

How does SSR hydration work in Angular — non-destructive hydration and mismatches?

Accepted Answer

**Target Audience:** Developers who have SSR running and want to understand, and fix, hydration errors. **Difficulty:** Hard > **How to read this doc:** Ideas are explained in plain language first, then tagged with 📌 Interview term: so you also learn the words an interviewer listens for. All output was produced on Angular 22.2.3 by rendering each example with renderApplication and hydrating the result in jsdom with bootstrapApplication. jsdom uses a real

Question 3

What is zoneless Angular and how does it improve performance in Angular 18?

Accepted Answer

**Target Audience:** Developers who have read "zoneless" in release notes and want the real story and the real numbers — familiar with components, no Zone.js internals required. **Difficulty:** Medium > **How to read this doc:** Plain language first, then 📌 Interview term: callouts with the vocabulary an interviewer expects. The version timeline was checked against release coverage and the Angular 22.2.3 typings; bundle sizes come from two real ng build runs with Angu

ANGULARDECODED.

Hard

viewChild() signal queries vs @ViewChild decorator — what changed?

How does SSR hydration work in Angular — non-destructive hydration and mismatches?

What is zoneless Angular and how does it improve performance in Angular 18?