Which of the following accurately describes Non-Blocking I/O in Node.js?
- I/O operations that block the main thread
- I/O operations that execute concurrently
- I/O operations that are not supported in Node.js
- I/O operations that must be executed in a callback
Non-Blocking I/O in Node.js refers to I/O operations that execute concurrently without blocking the main thread. It allows Node.js to perform multiple I/O operations without waiting for each operation to complete. The other options describe blocking I/O or do not accurately describe non-blocking I/O.
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