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GCDL Practice Question: A company runs a multi-tenant SaaS application on…
This GCDL practice question tests your understanding of a company runs a multi-tenant saas application on…. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 company runs a multi-tenant SaaS application on Google Cloud where each customer's data must be strictly isolated from other customers'. A security architect is evaluating approaches: (A) logical isolation using application-level tenant IDs in a shared database, (B) IAM-based separation using separate service accounts per tenant, or (C) infrastructure-level isolation with separate Google Cloud projects per tenant. Which approach provides the strongest isolation guarantee?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
All three approaches provide equivalent isolation because Google Cloud's hypervisor ensures complete tenant separation at the hardware level
Hypervisor isolation protects between VMs, not between tenants sharing the same VM or same database. Application-level logical isolation provides no protection from application bugs. The three approaches have fundamentally different isolation strengths.
B
Distractor review
IAM-based separation using separate service accounts per tenant within a shared project, because IAM provides cryptographically enforced access control
IAM-based separation within a shared project is stronger than application-level tenant IDs but weaker than project-level isolation. Service accounts in the same project share the same VPC, same database instance, and same resource namespace. IAM controls management-plane access but doesn't isolate data-plane access between resources in the same project.
C
Distractor review
Logical isolation using application-level tenant IDs, because it is the most cost-efficient and sufficient for regulated workloads
Logical isolation using tenant IDs in shared infrastructure is the weakest form of isolation. A single application bug (SQL injection, missing WHERE clause on tenant_id, improper cache key) can expose cross-tenant data. It is also not typically accepted as sufficient isolation for highly regulated data (healthcare, financial).
D
Best answer
Separate Google Cloud projects per tenant, which provides the strongest isolation: separate IAM boundaries, separate resource namespaces, separate audit logs, and no shared database instances with other tenants
Project-level isolation is the gold standard for multi-tenant isolation. Each project is a completely independent security boundary. Separate IAM means no privilege escalation between tenants. Separate databases mean no shared infrastructure where bugs could leak data. Separate audit logs make compliance reporting per-tenant straightforward.
Common exam trap
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Technical deep dive
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Related practice questions
Related GCDL practice-question pages
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More questions from this exam
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Question 1
A traditional retailer currently maintains its own data centers, purchasing servers every 3–5 years and paying for facilities, power, and staff regardless of demand. When it migrates its workloads to the public cloud, which change in cost model does it experience?
Question 2
An e-commerce company plans its infrastructure for peak shopping events (e.g., Black Friday) which drive 50× normal traffic. On-premises, they must maintain 50× capacity year-round. In the cloud, they provision 50× capacity only during peak periods. Which cloud characteristic enables this cost optimization?
Question 3
Which term describes the process by which organizations integrate digital technology into all areas of their business, fundamentally changing how they operate and deliver value to customers?
Question 4
When a company moves from maintaining its own data center to using Google Cloud, which operational responsibility does Google assume that the company previously managed?
Question 5
A hospital runs a patient records system that must remain on-premises due to strict regulatory data residency requirements. However, they also want to use cloud-based AI for diagnostic imaging analysis. Which cloud deployment model best describes their architecture?
Question 6
What is virtualization in the context of cloud computing, and why is it fundamental to how cloud providers deliver services?
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FAQ
Questions learners often ask
What does this GCDL question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: Separate Google Cloud projects per tenant, which provides the strongest isolation: separate IAM boundaries, separate resource namespaces, separate audit logs, and no shared database instances with other tenants — Infrastructure-level isolation with separate projects per tenant is the strongest because it provides isolation at every layer: separate resource namespaces, separate IAM boundaries, separate billing, separate network boundaries, separate audit logs, and no shared database instances. Logical isolation in a shared database relies entirely on correct application-level enforcement — a single bug could expose cross-tenant data. Project-level isolation adds hardware-enforced boundaries on top of application logic.
What should I do if I get this GCDL question wrong?
Identify which GCDL exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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This GCDL practice question is part of Courseiva's free Google Cloud certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the GCDL exam.