Node.js · Theory

What is the Poll phase in the Node.js event loop

Theory

198/723

What is the Poll phase in the Node.js event loop

the Poll phase in the Node.js event loop (what is) is a Node.js idea you prove with wait for DB then reply, not with a slogan.

For the Poll phase in the Node.js event loop (what is), the event loop is in play. Don’t blame it until you have traced wait for DB then reply.

Skip the Poll phase in the Node.js event loop (what is) and fs.readFileSync on a huge file shows up in one Node process.

Dev ships the Poll phase in the Node.js event loop (what is) in one Node process. That is the use case worth saying.

If wait for DB then reply breaks under the Poll phase in the Node.js event loop (what is), check fs.readFileSync on a huge file first.

After the Poll phase in the Node.js event loop (what is), Dev should still remember fs.readFileSync on a huge file.

Close the Poll phase in the Node.js event loop (what is) with: “If I skip it, wait for DB then reply goes wrong like this: fs.readFileSync on a huge file.”

Diagram

  request
      │
      ▼
  event loop
      │ I/O done
      ▼
  response

Exam tip

For the Poll phase in the Node.js event loop (what is): definition + one Node process + one failure.

Example

const EventEmitter = require("events");
const bus = new EventEmitter();

bus.on("ping", (n) => console.log("pong", n));
bus.emit("ping", 1);
bus.emit("ping", 2);

What is the Poll phase in the Node.js event loop — eventEmitter is the pub/sub core used across Node APIs.

Short notes

Defthe Poll phase in the Node.js event loop (what is) — Dev uses it for wait for DB then reply in one Node process.
Rulethe Poll phase in the Node.js event loop (what is) → async I/O, don’t block.
Rememberthe Poll phase in the Node.js event loop (what is) + the event loop (one Node process).
Usethe Poll phase in the Node.js event loop (what is) in one Node process (wait for DB then reply).
Trapthe Poll phase in the Node.js event loop (what is) — fs.readFileSync on a huge file.
Exthe Poll phase in the Node.js event loop (what is) → wait for DB then reply.

Node.js · Theory

What is the Poll phase in the Node.js event loop

← All stacks

Theory

198/723

What is the Poll phase in the Node.js event loop

the Poll phase in the Node.js event loop (what is) is a Node.js idea you prove with wait for DB then reply, not with a slogan.

For the Poll phase in the Node.js event loop (what is), the event loop is in play. Don’t blame it until you have traced wait for DB then reply.

Skip the Poll phase in the Node.js event loop (what is) and fs.readFileSync on a huge file shows up in one Node process.

Dev ships the Poll phase in the Node.js event loop (what is) in one Node process. That is the use case worth saying.

If wait for DB then reply breaks under the Poll phase in the Node.js event loop (what is), check fs.readFileSync on a huge file first.

After the Poll phase in the Node.js event loop (what is), Dev should still remember fs.readFileSync on a huge file.

Close the Poll phase in the Node.js event loop (what is) with: “If I skip it, wait for DB then reply goes wrong like this: fs.readFileSync on a huge file.”

Diagram

  request
      │
      ▼
  event loop
      │ I/O done
      ▼
  response

Exam tip

For the Poll phase in the Node.js event loop (what is): definition + one Node process + one failure.

Example

const EventEmitter = require("events");
const bus = new EventEmitter();

bus.on("ping", (n) => console.log("pong", n));
bus.emit("ping", 1);
bus.emit("ping", 2);

What is the Poll phase in the Node.js event loop — eventEmitter is the pub/sub core used across Node APIs.

Short notes

Defthe Poll phase in the Node.js event loop (what is) — Dev uses it for wait for DB then reply in one Node process.
Rulethe Poll phase in the Node.js event loop (what is) → async I/O, don’t block.
Rememberthe Poll phase in the Node.js event loop (what is) + the event loop (one Node process).
Usethe Poll phase in the Node.js event loop (what is) in one Node process (wait for DB then reply).
Trapthe Poll phase in the Node.js event loop (what is) — fs.readFileSync on a huge file.
Exthe Poll phase in the Node.js event loop (what is) → wait for DB then reply.

What is the Poll phase in the Node.js event loop

Example

Short notes

Questions

What is the Poll phase in the Node.js event loop

Example

Short notes

Questions