Question 1

What are the main security risks of using the 'eval()' function in Node.js?

Accepted Answer

**Target Audience:** Engineers preparing for Node.js security-focused phone screens — no prior security background assumed. **Difficulty:** Easy > **How to read this doc:** Concepts are explained in plain language first, then tagged with 📌 Interview term:. Every consequence below was **actually demonstrated by running real code**, not described as a hypothetical. ## 1. Why This Even Matters — A Story First Handing a stranger a blank check with your signature already on it is fun

Question 2

How do you handle uncaught exceptions and unhandled promise rejections in Node.js?

Accepted Answer

**Target Audience:** Engineers preparing for Node.js interviews — assumes basic Promise/async familiarity. **Difficulty:** Medium > **How to read this doc:** Concepts are explained in plain language first, then tagged with 📌 Interview term:. Both the handled and the genuinely unhandled (crashing) cases below were **actually executed** on Node v24.19.0 — a real exit code, not an assumption. ## 1. Why This Even Matters — A Story First A building has two entirely separate emergency

Question 3

What is the difference between operational and programmer errors in Node.js?

Accepted Answer

**Target Audience:** Engineers preparing for Node.js interviews — assumes basic try/catch and custom Error class familiarity. **Difficulty:** Medium > **How to read this doc:** Concepts are explained in plain language first, then tagged with 📌 Interview term:. The branching logic and the crash-on-bug pattern below were both **executed on Node v24.19.0** — the exact output, including a real process exit code, is pasted in. ## 1. Why This Even Matters — A Story First A pilot has t

NODE.JSDECODED.

Easy

What are the main security risks of using the 'eval()' function in Node.js?

Medium

How do you handle uncaught exceptions and unhandled promise rejections in Node.js?

What is the difference between operational and programmer errors in Node.js?