The correct answer is Serverless VPC Access connector with Private Services Access for Cloud SQL. This configuration works because Serverless VPC Access creates a bridge between Cloud Run and your VPC, allowing the serverless service to reach internal resources, while Private Services Access assigns Cloud SQL a private internal IP within that same VPC, eliminating the need for public internet traversal and thus minimizing latency. On the Google Professional Cloud Developer exam, this scenario tests your understanding of how to securely connect serverless compute to managed databases without exposing them to the public internet, often appearing as a multi-service networking question. A common trap is confusing Cloud NAT, which only handles outbound internet traffic, with the inbound private connectivity needed here. Remember the key pairing: Serverless VPC Access for the compute side, Private Services Access for the database side — think of it as the “bridge and the address” for private, low-latency communication.
PCD Practice Question: Designing highly scalable, available, and reliable cloud-native applications
This PCD practice question tests your understanding of designing highly scalable, available, and reliable cloud-native applications. 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.
An application on Cloud Run needs to connect to a Cloud SQL instance securely with minimal latency. It also needs to access Cloud Storage buckets in the same region. Which networking configuration should they use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Serverless VPC Access connector with Private Services Access for Cloud SQL
Option A is correct because Serverless VPC Access allows Cloud Run to reach VPC resources, and Private Services Access enables Cloud SQL to have an internal IP within the VPC, minimizing latency. Option B is wrong because Cloud NAT is for outbound internet, not internal connectivity. Option C is wrong because direct VPC peering is not directly applicable to Cloud Run. Option D is wrong because the Cloud SQL Auth Proxy with public IP introduces additional latency and security concerns.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Serverless VPC Access connector with Private Services Access for Cloud SQL
Why this is correct
This configuration provides low-latency, private connectivity between Cloud Run and Cloud SQL.
Related concept
Static NAT maps one inside address to one outside address.
✗
Cloud NAT for outbound traffic
Why it's wrong here
Cloud NAT is used for outbound internet access, not for connecting to Cloud SQL.
✗
Direct VPC peering with Cloud SQL
Why it's wrong here
Direct VPC peering is not supported for Cloud SQL instances; instead, Private Services Access is used.
✗
Use Cloud SQL Auth Proxy with public IP
Why it's wrong here
The Cloud SQL Auth Proxy over public IP adds latency and exposes traffic to the internet.
Common exam traps
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.
Detailed technical explanation
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.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
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 PCD NAT questions on configuration and troubleshooting.
Designing highly scalable, available, and reliable cloud-native applications — This question tests Designing highly scalable, available, and reliable cloud-native applications — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Serverless VPC Access connector with Private Services Access for Cloud SQL — Option A is correct because Serverless VPC Access allows Cloud Run to reach VPC resources, and Private Services Access enables Cloud SQL to have an internal IP within the VPC, minimizing latency. Option B is wrong because Cloud NAT is for outbound internet, not internal connectivity. Option C is wrong because direct VPC peering is not directly applicable to Cloud Run. Option D is wrong because the Cloud SQL Auth Proxy with public IP introduces additional latency and security concerns.
What should I do if I get this PCD 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 PCD NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This PCD 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 PCD exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.