Node.js Professional Standards & Competencies 5

Question 1

What professional standard applies when a Node.js developer discovers a security vulnerability in an open-source package they use?

Accepted Answer

Report it responsibly to the maintainer through the project's security disclosure process

Answer

Responsible disclosure gives maintainers time to patch before public exposure, following coordinated vulnerability disclosure standards.

Question 2

Which Node.js coding practice aligns with the principle of 'fail fast'?

Accepted Answer

Validating required configuration and throwing at startup if critical values are absent

Answer

Failing fast at startup surfaces misconfigurations immediately rather than allowing a half-broken service to silently misbehave.

Question 3

What is the professional standard for code reviews in a Node.js team working on a production application?

Accepted Answer

All changes require at least one peer review before merging to the main branch

Answer

Mandatory peer review catches bugs, spreads knowledge, and maintains code quality standards across the team.

Question 4

How does a professional Node.js developer ensure database query parameters are safe from SQL injection?

Accepted Answer

Use parameterized queries or prepared statements, never string interpolation for user input

Answer

Parameterized queries separate data from SQL syntax at the driver level, making injection structurally impossible.

Question 5

What professional competency is demonstrated by writing a Node.js module with a single, well-defined responsibility?

Accepted Answer

Single Responsibility Principle (SRP)

Answer

SRP means each module does one thing well, making it easier to test, reuse, and change independently.

Node.js Practice Test