The OpenJS Node.js Application Developer (JSNAD) certification tests and verifies candidates’ skills in using Node.js to create web-based applications.
OpenJS Node.js Application Developer (JSNAD)




Incremental Processing
Transforming Data
Connecting Streams

Control flow abstractions

Child process configuration

Basic performance analysis

Handling errors in various scenarios


Building event emitters
Consuming event emitters

Watching

Scoped to core language features introduced since EcmaScript 1 and still heavily used today


Getting system data

Dependency management

Testing synchronous code
Testing asynchronous code
The exam includes tasks simulating on-the-job scenarios, and Candidates have 2 hours to complete the tasks