VIP Exclusive
Node.js VIP Certification Practice Exam (JSNAD-Style)
Node.js — This exam mirrors the OpenJS Node.js Application Developer (JSNAD) certification issued by the OpenJS Foundation. The real JSNAD is a hands-on, performance-based exam (180 minutes, ~71% passing score) administered via PSI and covers core Node.js APIs including buffers, streams, child processes, error handling, the module system, the file system, and async control flow. This practice set adapts those domains into a multiple-choice format for VIP study preparation.
31
Questions
90m
Time Limit
71.00%
To Pass
Question 1 of 31👑 VIP
You are reviewing a production Node.js service and notice that a long-running synchronous computation in a request handler is causing all other incoming HTTP requests to queue up and time out. Which fundamental characteristic of Node.js explains this behavior, and what is the correct architectural remedy? A) Node.js uses a thread-per-request model; the remedy is to reduce thread pool size. B) Node.js runs JavaScript on a single thread with a non-blocking event loop; synchronous work blocks the loop and the remedy is to offload the computation to a Worker Thread or child process. C) Node.js cannot handle concurrent requests; the remedy is to switch to a multi-threaded framework. D) Node.js event loop automatically parallelizes CPU work; the computation must be rewritten to use async/await.
Questions 2–31 and full explanations are VIP-exclusive.