[Solved] Which of the following is the correct syntax for an error-first callback function in Node.js? — Ans: function callback(error, result) { ... } | Node.js

Node.js - Error Handling Patterns

Which of the following is the correct syntax for an error-first callback function in Node.js?

Afunction callback(error, result) { ... }

Bfunction callback(result, error) { ... }

Cfunction callback() { ... }

Dfunction callback(result) { ... }

Step-by-Step Solution

Solution:

Step 1: Identify the correct parameter order
The error-first callback convention requires the first parameter to be error, second to be result.
Step 2: Match the syntax
Only the function with parameters (error, result) follows this convention correctly.
Final Answer:
function callback(error, result) { ... } -> Option A
Quick Check:
Callback params: error first, result second [OK]

Quick Trick: Error is first parameter in callback functions [OK]

Common Mistakes:

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Which of the following is the correct syntax for an error-first callback function in Node.js?