Node.js Technology & Digital Applications 2

Question 1

Which Node.js global object provides information about the current process, such as environment variables and command-line arguments?

Accepted Answer

process

Answer

The `process` global object exposes environment variables via `process.env`, CLI args via `process.argv`, and lifecycle methods like `process.exit()`.

Question 2

What is the primary purpose of the `cluster` module in Node.js?

Accepted Answer

Share a single server port across multiple worker processes

Answer

The `cluster` module lets you fork child processes that share the same server port, enabling multi-core utilization.

Question 3

In Node.js streams, what does calling `stream.pipe(destination)` return?

Accepted Answer

The destination stream

Answer

`pipe()` returns the destination stream, enabling chaining like `a.pipe(b).pipe(c)`.

Question 4

Which HTTP status code should a RESTful Node.js API return when a resource is successfully created?

Accepted Answer

201 Created

Answer

201 Created signals that the request succeeded and a new resource was created as a result.

Question 5

What does the `--inspect` flag do when starting a Node.js application?

Accepted Answer

Enables the V8 inspector protocol for debugging

Answer

`--inspect` opens a debugging port (default 9229) so Chrome DevTools or VS Code can attach to the running process.

Node.js Practice Test

Node.js Practice Test

Node.js Technology & Digital Applications 2