User authentication and authorization in SCADA systems - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if a user is authenticated.

SCADA systems

if user.[1]():
    print("Access granted")

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Avalidate

Bauthorize

Clogin

Dis_authenticated

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'login' instead of 'is_authenticated' causes an error because 'login' is an action, not a check.

The method is_authenticated() returns True if the user is logged in.

2fill in blank

medium

Complete the code to authorize a user based on their role.

SCADA systems

if user.role == '[1]':
    allow_access()

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Aguest

Badmin

Cvisitor

Doperator

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'guest' or 'visitor' will restrict access instead of allowing it.

The role 'admin' typically has full access rights in a system.

3fill in blank

hard

Fix the error in the code that checks user permissions.

SCADA systems

if user.has_permission('[1]'):
    perform_action()

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AreadData

Bread data

Cread_data

Dread-data

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'read-data' or 'read data' causes permission check to fail.

Permission names should be simple strings without spaces or special characters, like 'read_data'.

4fill in blank

hard

Fill both blanks to create a dictionary of users with their roles, filtering only admins.

SCADA systems

admins = {user: [1] for user, [2] in users.items() if role == 'admin'}

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Arole

Broles

Drole_name

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names causes NameError or logic errors.

The dictionary comprehension uses 'role' as the variable for the user's role, matching the filter condition.

5fill in blank

hard

Fill all three blanks to create a dictionary of usernames in uppercase with their permissions filtered by 'write' access.

SCADA systems

filtered = [1]([2].upper(): perms for [3], perms in user_permissions.items() if 'write' in perms)

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Adict

Busername

Cuser

Dusers

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'username' or 'users' inconsistently causes errors or wrong keys.

We use dict to create a dictionary, user as the variable for usernames, and convert usernames to uppercase.