[Solved] A developer wrote this code to enforce the 'Fail-Safe Defaults' pattern:def check_access(user): if user == 'admin': return True elif user == 'guest':... | Cybersecurity

Cybersecurity - Security Architecture and Design

A developer wrote this code to enforce the 'Fail-Safe Defaults' pattern:

def check_access(user):
    if user == 'admin':
        return True
    elif user == 'guest':
        return False
    # Missing return for other users

What is the main problem with this code?

AIt uses incorrect syntax for the function.

BIt grants access to all users by default.

CIt does not deny access by default for unknown users.

DIt returns True for guests.

Step-by-Step Solution

Solution:

Step 1: Understand 'Fail-Safe Defaults'
This pattern means access should be denied unless explicitly allowed.
Step 2: Check the function's return paths
The function returns True for 'admin', False for 'guest', but returns nothing (None) for others, which may be treated as allowed or cause errors.
Final Answer:
It does not deny access by default for unknown users. -> Option C
Quick Check:
Fail-Safe Defaults = deny unless allowed [OK]

Quick Trick: Always deny access if user unknown [OK]

Common Mistakes:

MISTAKES

Assuming missing return means deny
Thinking syntax is wrong
Confusing guest access rights

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A developer wrote this code to enforce the 'Fail-Safe Defaults' pattern:

Step 1: Understand 'Fail-Safe Defaults'

Step 2: Check the function's return paths

Final Answer:

Quick Check:

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