[Solved] Consider this code snippet:res.setHeader('Content-Type', 'application/json'); res.setHeader('Content-Type', 'text/html'); res.end();What will be the final Content-Type header sent to the client? | Node.js

Node.js - HTTP Module

Consider this code snippet:

res.setHeader('Content-Type', 'application/json');
res.setHeader('Content-Type', 'text/html');
res.end();

What will be the final Content-Type header sent to the client?

Aapplication/json

Bapplication/json, text/html

CNo Content-Type header

Dtext/html

Step-by-Step Solution

Solution:

Step 1: Understand header overwriting behavior
Setting the same header twice overwrites the previous value in Node.js.
Step 2: Identify last set value
The last setHeader call sets 'Content-Type' to 'text/html', which replaces 'application/json'.
Final Answer:
text/html -> Option D
Quick Check:
Last header set wins = C [OK]

Quick Trick: Last setHeader call for same header overwrites previous [OK]

Common Mistakes:

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