Question 1

What is the role of NgRx Effects, and why do we separate side effects from reducers?

Accepted Answer

**Target Audience:** Angular developers who know the basics of the NgRx store (actions, reducers, selectors) and want to understand where HTTP calls and other side effects belong. **Difficulty:** Medium to 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. The action log in section 5, the error-handling run in section 6 and the effect test in section 7 were produce

Question 2

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 3

What is NgRx?

Accepted Answer

**Target Audience:** Angular developers who have heard "NgRx" in every job description and want a clear picture of what it is, how data moves through it, and when it is worth it. **Difficulty:** Medium > **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. The store example in section 5, the memoization and reducer checks in section 6 and the immutability error in section 7

Question 4

What are the differences between State Management libraries in Angular?

Accepted Answer

**Target Audience:** Angular developers and tech leads choosing a state-management approach for a new or growing app. **Difficulty:** Medium to 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. The two implementations in section 6 were compiled and run on Angular 22.2.3 with @ngrx/signals 22.0.1, the API-stability claims were read from the installed package typing

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Medium

What is the role of NgRx Effects, and why do we separate side effects from reducers?

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

Hard

What is NgRx?

What are the differences between State Management libraries in Angular?