The answer is to create a custom role with only the necessary permissions and reassign it to the service account. This is correct because the principle of least privilege demands that a service account receive only the specific permissions required for its function, not the broad, all-encompassing access granted by the Editor role, which includes write and delete capabilities across all resources. On the Google Professional Cloud Security Engineer exam, this scenario tests your understanding of IAM best practices and the distinction between predefined roles and custom roles; a common trap is confusing network-level controls like VPC Service Controls with permission management. Remember that Editor is a legacy role that grants excessive permissions, so the fix is always to audit the service account’s actual needs and build a custom role from scratch. Memory tip: “Custom cuts clutter” — a custom role trims the fat of Editor down to only what’s needed.
PCSE Practice Question: Managing operations in a cloud solution environment
This PCSE practice question tests your understanding of managing operations in a cloud solution environment. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A security engineer notices that a service account has been granted the 'roles/editor' role on a project. According to least privilege, what is the best course of action?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Clue: "least"
Why it matters: You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a custom role with only the necessary permissions and reassign it to the service account.
Option D is correct because creating a custom role with only the necessary permissions and reassigning it minimizes privileges while maintaining functionality. Option A is too drastic and may break services. Option B may be too restrictive. Option C doesn't change the permissions; VPC Service Controls restrict access at the network level, not permissions.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Create a custom role with only the necessary permissions and reassign it to the service account.
Why this is correct
Custom roles allow precise permission assignment, adhering to least privilege.
Clue confirmation
The clue words "best", "least" in the question point toward this answer.
Related concept
Authentication checks who the user is.
✗
Remove the service account and create a new one with a custom role containing only required permissions.
Why it's wrong here
Unnecessary to delete the account; better to modify its role.
✗
Change the role to 'roles/viewer' to be more restrictive.
Why it's wrong here
Viewer may not include permissions needed for the service account's tasks.
✗
Keep the role but add an access boundary using VPC Service Controls.
Why it's wrong here
VPC Service Controls restrict network access but do not reduce IAM permissions.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
Authentication checks who the user is.
Authorization controls what the user is allowed to do after login.
Privilege levels affect access to EXEC and configuration commands.
AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
→Do not assume successful login means full administrative access.
→Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
→Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related PCSE questions on access control and AAA configuration.
Managing operations in a cloud solution environment — This question tests Managing operations in a cloud solution environment — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: Create a custom role with only the necessary permissions and reassign it to the service account. — Option D is correct because creating a custom role with only the necessary permissions and reassigning it minimizes privileges while maintaining functionality. Option A is too drastic and may break services. Option B may be too restrictive. Option C doesn't change the permissions; VPC Service Controls restrict access at the network level, not permissions.
What should I do if I get this PCSE question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related PCSE questions on access control and AAA configuration.
Are there clue words in this question I should notice?
Yes — watch for: "best", "least". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Authentication checks who the user is.
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