Node.js · Theory

Buffer.readInt32LE() Method

Theory

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Buffer.readInt32LE() Method sits in an upload job. Neha’s job is read a big CSV. Write that first.

For Buffer.readInt32LE() Method, the event loop is in play. Don’t blame it until you have traced read a big CSV.

Buffer.readInt32LE() Method exists so Neha can keep read a big CSV correct in an upload job.

Use Buffer.readInt32LE() Method when read a big CSV must stay clear. If a simpler Node.js step works, use that instead.

Don’t do this with Buffer.readInt32LE() Method: loading the whole file into RAM. Interviewers spot it in ten seconds.

After Buffer.readInt32LE() Method, Neha should still remember loading the whole file into RAM.

Viva for Buffer.readInt32LE() Method — what it is → createReadStream → the mistake (loading the whole file into RAM).

Exam tip

Say Buffer.readInt32LE() Method in one breath, then createReadStream, then loading the whole file into RAM.

const buf = Buffer.from("PrepPilot", "utf8");
console.log(buf.toString("utf8"));
console.log(buf.length);

Buffer.readInt32LE() Method — buffer holds raw binary data outside the V8 string heap.

DefBuffer.readInt32LE() Method — Neha uses it for read a big CSV in an upload job.
RuleBuffer.readInt32LE() Method → createReadStream.
RememberBuffer.readInt32LE() Method + the event loop (an upload job).
UseBuffer.readInt32LE() Method in an upload job (read a big CSV).
TrapBuffer.readInt32LE() Method — loading the whole file into RAM.
ExBuffer.readInt32LE() Method → read a big CSV.