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GCDL Practice Question: A company's PostgreSQL database has grown to 50…
This GCDL practice question tests your understanding of a company's postgresql database has grown to 50…. 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's PostgreSQL database has grown to 50 TB and their application requires near-zero downtime, automatic failover, and the ability to scale reads horizontally without the migration complexity of switching to Spanner. Which Google Cloud database product is specifically designed as a fully managed, highly scalable PostgreSQL-compatible database?
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
Bare metal PostgreSQL on Compute Engine
Self-managed PostgreSQL on VMs requires managing patching, backups, HA configuration, and monitoring — the opposite of a fully managed solution.
B
Distractor review
Cloud Spanner
Cloud Spanner provides global horizontal scaling but is not PostgreSQL-compatible. Applications would require rewriting to use Spanner's API.
C
Best answer
AlloyDB for PostgreSQL
AlloyDB provides full PostgreSQL compatibility with enterprise-grade performance (4× faster OLTP, 100× faster analytics), 99.99% HA, and horizontal read scaling — without changing application code.
D
Distractor review
Cloud SQL (PostgreSQL)
Cloud SQL PostgreSQL is suitable for many workloads but has scale and performance limits. For 50 TB with high-performance requirements, AlloyDB is specifically designed to exceed Cloud SQL's capabilities.
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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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?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: AlloyDB for PostgreSQL — AlloyDB for PostgreSQL is Google Cloud's fully managed PostgreSQL-compatible database designed for demanding enterprise workloads. It offers: 4× faster transactional throughput than standard PostgreSQL, 100× faster analytical queries (via columnar engine), 99.99% availability SLA with automatic failover, read pool instances for horizontal read scaling, and full PostgreSQL compatibility — no application changes required to migrate from standard PostgreSQL. It's positioned between Cloud SQL (standard PostgreSQL) and Cloud Spanner (global scale).
What should I do if I get this GCDL 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 GCDL NAT questions on configuration and troubleshooting.
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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.