[Solved] Given this pseudocode for API key validation: function validateKey(request) { key = request.headers['API-Key'] if key is null or key not in validKeys: return 'Access Denied' else:... | Microservices

Microservices - Authentication and Authorization

Given this pseudocode for API key validation:

function validateKey(request) {
  key = request.headers['API-Key']
  if key is null or key not in validKeys:
    return 'Access Denied'
  else:
    return 'Access Granted'
}

What will be the output if the request has no 'API-Key' header?

AAccess Denied

BError: Missing header

CAccess Granted

DAccess Pending

Step-by-Step Solution

Solution:

Step 1: Check header presence condition
The code checks if the key is null or not in validKeys. If the header is missing, key is null.
Step 2: Determine the return value for missing key
Since key is null, the condition is true, so the function returns 'Access Denied'.
Final Answer:
Access Denied -> Option A
Quick Check:
Missing key = Access Denied [OK]

Quick Trick: No API-Key header means deny access [OK]

Common Mistakes:

MISTAKES

Assuming missing key grants access
Expecting an error instead of denial
Confusing 'null' with empty string

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Given this pseudocode for API key validation:

Step 1: Check header presence condition

Step 2: Determine the return value for missing key

Final Answer:

Quick Check:

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