Google PCA Manage and provision cloud infrastructure Practice Question
This PCA practice question tests your understanding of manage and provision cloud infrastructure. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 has a Cloud SQL for PostgreSQL instance that is experiencing high latency. They suspect a connection pooling issue. Which TWO configurations should be checked? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Cloud SQL Auth Proxy configuration
The Cloud SQL proxy provides secure connections and connection pooling to reduce latency. The max_connections parameter affects how many connections are allowed and can be a bottleneck. Query insights helps but is not a configuration. Private IP vs public IP affects network path but not connection pooling per se.
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.
✓
Cloud SQL Auth Proxy configuration
Why this is correct
Correct. The proxy handles connection pooling efficiently.
Related concept
Static NAT maps one inside address to one outside address.
✓
max_connections database flag
Why this is correct
Correct. Limited max_connections can cause queuing and latency.
Related concept
Static NAT maps one inside address to one outside address.
✗
Private IP assignment
Why it's wrong here
IP type affects network path, not connection pooling.
✗
Database query insights
Why it's wrong here
Query insights helps analyze query performance, not connection pooling.
✗
Database version
Why it's wrong here
Version may affect features, but is not directly related to pooling configuration.
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 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 PCA question in full detail.
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 PCA NAT questions on configuration and troubleshooting.
Manage and provision cloud infrastructure — This question tests Manage and provision cloud infrastructure — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Cloud SQL Auth Proxy configuration — The Cloud SQL proxy provides secure connections and connection pooling to reduce latency. The max_connections parameter affects how many connections are allowed and can be a bottleneck. Query insights helps but is not a configuration. Private IP vs public IP affects network path but not connection pooling per se.
What should I do if I get this PCA 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 PCA NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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