Node.js Professional Standards & Competencies 4

Question 1

Which testing strategy reflects professional competency for a Node.js REST API?

Accepted Answer

Combine unit tests for business logic, integration tests for routes, and end-to-end tests for critical flows

Answer

A layered testing strategy (unit + integration + e2e) balances coverage, speed, and confidence at each level.

Question 2

What is the professional standard for committing secrets like database passwords into a Git repository?

Accepted Answer

Never commit secrets; use environment variables, secret managers, or vault services instead

Answer

Secrets in Git history can be exposed even if later deleted, and private repos can become public or be cloned.

Question 3

When releasing a new major version of an npm package, what professional documentation practice is expected?

Accepted Answer

Publish a changelog or migration guide detailing breaking changes and upgrade steps

Answer

A changelog and migration guide help consumers understand what changed and how to upgrade safely.

Question 4

Which practice demonstrates professional competency in Node.js performance monitoring?

Accepted Answer

Implementing APM tools (e.g., New Relic, Datadog) and setting proactive alerts on latency and error rate thresholds

Answer

Proactive monitoring with alerting thresholds catches regressions before they impact users at scale.

Question 5

A Node.js service uses a third-party library that has not been updated in 3 years. What is the professional approach?

Accepted Answer

Evaluate actively maintained alternatives, check for known CVEs, and plan a migration if risk is high

Answer

Unmaintained dependencies accumulate unpatched vulnerabilities; proactive evaluation reduces supply-chain risk.

Node.js Practice Test