Google ACE Practice Question: Ensuring successful operation of a cloud solution
This ACE practice question tests your understanding of ensuring successful operation of a cloud solution. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 uses Cloud DNS for internal DNS resolution. They recently added a new VPC and need to ensure that instances in this VPC can resolve private DNS names that are hosted in another project. What must be configured?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Set up a DNS peering zone between the new VPC and the VPC that hosts the private zone.
Option C is correct because Cloud DNS peering allows a VPC in one project to resolve private DNS names hosted in a private zone in another project without requiring the zones to be shared or exported. DNS peering establishes a direct query path between the peered VPCs, enabling the new VPC to resolve names in the private zone as if they were local, while the zone remains private and managed in its original project.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Use Cloud DNS inbound server policy to forward queries to the other VPC.
Why it's wrong here
Inbound server policy is for on-premises DNS resolution, not VPC-to-VPC.
✗
Export the private zone as a public zone and create a delegation.
Set up a DNS peering zone between the new VPC and the VPC that hosts the private zone.
Why this is correct
DNS peering allows the new VPC to query private zones from the source VPC.
Related concept
Read the scenario before looking for a memorised answer.
✗
Create a Private DNS zone in the new project with forwarding to the on-premises DNS.
Why it's wrong here
Forwarding to on-premises doesn't resolve the other project's private zone.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse DNS peering with inbound/outbound server policies, mistakenly thinking that forwarding policies are needed for inter-VPC resolution, when in fact peering directly connects DNS namespaces without requiring external forwarding.
Detailed technical explanation
How to think about this question
DNS peering works by creating a peering connection between the source VPC's DNS namespace and the target VPC's private zone, allowing the source VPC to send DNS queries directly to the target VPC's authoritative DNS servers. Under the hood, Cloud DNS uses a shared forwarding path within Google's internal network, so no public internet traversal occurs, and the resolution respects IAM permissions on the private zone. A real-world scenario is a multi-project environment where a central project hosts private zones for shared services (e.g., internal database endpoints) and other projects need to resolve those names without duplicating zone management.
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.
TExam Day Tips
→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.
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this ACE question in full detail.
Ensuring successful operation of a cloud solution — This question tests Ensuring successful operation of a cloud solution — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Set up a DNS peering zone between the new VPC and the VPC that hosts the private zone. — Option C is correct because Cloud DNS peering allows a VPC in one project to resolve private DNS names hosted in a private zone in another project without requiring the zones to be shared or exported. DNS peering establishes a direct query path between the peered VPCs, enabling the new VPC to resolve names in the private zone as if they were local, while the zone remains private and managed in its original project.
What should I do if I get this ACE question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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