[Solved] What will be the output of this JavaScript fetch call if the API key is missing? fetch('https://api.example.com/data', { headers: { 'Authorization': '' } }) .then(res => console.log(res.status)) | Rest API

Rest API - Authentication and Authorization

What will be the output of this JavaScript fetch call if the API key is missing?

fetch('https://api.example.com/data', {
  headers: { 'Authorization': '' }
})
.then(res => console.log(res.status))

A200

B403

C401

D400

Step-by-Step Solution

Solution:

Step 1: Understand missing API key response
When the Authorization header is empty, the server treats it as missing credentials and returns 401 Unauthorized.
Step 2: Analyze fetch call output
The console.log prints the response status, which will be 401.
Final Answer:
401 -> Option C
Quick Check:
Missing API key status = 401 Unauthorized [OK]

Quick Trick: Empty Authorization header triggers 401 Unauthorized [OK]

Common Mistakes:

MISTAKES

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