Q: What is the difference between @ViewChildren and @ViewChild?

**Target Audience:** Developers who know @ViewChild and need to work with a list of matches: several inputs, a @for of child components, a set of tabs. **Difficulty:** Medium > **How to read this doc:** Plain language first, then 📌 Interview term: callouts. Every "Verified" block was compiled with ngc (strict templates) on Angular 22.2.3 and run; compiled output was read from ngc itself. ## 1. Why This Even Matters — A Story Fir

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

What are template reference variables?

Accepted Answer

**Target Audience:** Anyone preparing for an Angular interview who has written a basic template. **Difficulty:** Easy > **How to read this doc:** Plain language first, then 📌 Interview term: callouts. Each "Verified" block comes from compiling the example with ngc and strict templates on Angular 22.2.3 and clicking or typing through it in jsdom. ## 1. Why This Even Matters — A Story First At a busy party you can say "pass me the blue mug" and everyone at the table k

Question 2

What is the difference between @ViewChildren and @ViewChild?

Accepted Answer

**Target Audience:** Developers who know @ViewChild and need to work with a list of matches: several inputs, a @for of child components, a set of tabs. **Difficulty:** Medium > **How to read this doc:** Plain language first, then 📌 Interview term: callouts. Every "Verified" block was compiled with ngc (strict templates) on Angular 22.2.3 and run; compiled output was read from ngc itself. ## 1. Why This Even Matters — A Story Fir

Question 3

What are @ViewChild and @ContentChild?

Accepted Answer

**Target Audience:** Developers preparing for an Angular interview who have used #ref in a template and want to reach that element, or a child component, from the class. **Difficulty:** Medium > **How to read this doc:** Plain language first, then 📌 Interview term: callouts. Every "Verified" block was compiled with ngc (strict templates) on Angular 22.2.3 and run; the decorator options are quoted from the installed typings. ## 1. Why This Even Matters —

Question 4

How do you pass data between sibling components that don't have a direct parent-child relationship?

Accepted Answer

**Target Audience:** Anyone who has passed data parent to child and now needs to share it sideways — assumes components and basic dependency injection. **Difficulty:** Medium > **How to read this doc:** Plain language first, then 📌 Interview term: callouts. Both examples were compiled with ngc on Angular 22.2.3 and run in jsdom, and both also passed the playground mode, so you can run them on this page. The RxJS comparison was run as a plain Node script. ## 1. Why Th

Question 5

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

ANGULARDECODED.

Easy

What are template reference variables?

Medium

What is the difference between @ViewChildren and @ViewChild?

What are @ViewChild and @ContentChild?

How do you pass data between sibling components that don't have a direct parent-child relationship?

Hard

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