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ACE Practice Question: A SaaS company serves 200 enterprise customers,…
This ACE practice question tests your understanding of a saas company serves 200 enterprise customers,…. 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 SaaS company serves 200 enterprise customers, each requiring complete data isolation in separate databases. The company needs to provision a new customer database within minutes and manage 200 databases with minimal overhead. Which GCP approach scales most efficiently?
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
Storing all customer data in a single shared database with customer_id as a discriminator column
A shared database with a discriminator column provides no true data isolation — a query bug could expose one customer's data to another.
B
Distractor review
Using BigQuery with a separate dataset per customer
BigQuery is an analytics warehouse — it's not appropriate for transactional SaaS application databases requiring row-level operations.
C
Distractor review
200 separate Cloud SQL instances, one per customer
200 separate Cloud SQL instances generate significant operational overhead (patching, monitoring, backups), costs, and slow provisioning — not scalable.
D
Best answer
A single Cloud SQL instance with a separate schema (database) per customer, provisioned via API automation
A single Cloud SQL instance with per-customer databases (schemas) balances isolation, cost efficiency, and provisioning speed. Automation via API or Terraform enables sub-minute provisioning.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Technical deep dive
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Related practice questions
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Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
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Question 2
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Question 3
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Question 4
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Question 5
A junior developer needs read-only access to all GCP resources in a project. Which IAM role grants the minimum permissions required?
Question 6
A startup creates its first Google Cloud project. Before deploying any paid resources, what must be linked to the project?
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FAQ
Questions learners often ask
What does this ACE question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: A single Cloud SQL instance with a separate schema (database) per customer, provisioned via API automation — Cloud Spanner multi-tenancy with separate schema or Firestore collections per customer enables isolation. For SQL isolation at scale, Cloud SQL instances per customer become costly and operationally heavy. A database-per-schema approach within a single Cloud SQL or Spanner instance balances isolation with manageability. For true isolation, automated Cloud SQL provisioning via Terraform or Cloud APIs is recommended.
What should I do if I get this ACE question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related ACE NAT questions on configuration and troubleshooting.
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This ACE 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 ACE exam.