PCNE Implementing a Virtual Private Cloud Practice Question
Exhibit
$ gcloud compute networks subnets describe my-subnet --region=us-central1 creationTimestamp: '2023-01-01' enableFlowLogs: false fingerprint: ... gatewayAddress: 10.0.0.1 id: ... ipCidrRange: 10.0.0.0/24 kind: compute#subnetwork name: my-subnet network: https://www.googleapis.com/compute/v1/projects/my-project/global/networks/my-vpc privateIpGoogleAccess: false region: https://www.googleapis.com/compute/v1/projects/my-project/regions/us-central1 stackType: IPV4_ONLY
Refer to the exhibit. A VM in my-subnet without an external IP address cannot access Google APIs. What is the likely missing configuration?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable Private Google Access on the subnet.
The subnet has privateIpGoogleAccess set to false, which must be enabled for VMs without external IPs to access Google APIs via Private Google Access. Option C (Enable Private Google Access on the subnet) is the correct configuration. Option A (Cloud NAT) is for outbound internet to non-Google destinations, not for Google APIs. Option B is not needed because egress to 0.0.0.0/0 is allowed by default. Option D is not missing; a default route exists as indicated by gatewayAddress.
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 Cloud NAT.
Why it's wrong here
Cloud NAT is for internet access to non-Google destinations, not for Google APIs via Private Google Access.
- ✗
Add a firewall rule to allow egress to 0.0.0.0/0.
Why it's wrong here
Default egress rules already allow outbound traffic.
- ✓
Enable Private Google Access on the subnet.
Why this is correct
The setting privateIpGoogleAccess is currently false; enabling it allows access to Google APIs.
- ✗
Add a default route to the internet gateway.
Why it's wrong here
The subnet already has a gatewayAddress, implying a default route exists.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCNE 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 PCNE exam.