Private Google Access in GCP - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

What does enabling Private Google Access on a subnet allow?

Consider a Google Cloud subnet with Private Google Access enabled. What capability does this feature provide to VM instances in that subnet?

A VMs can access the internet directly without any firewall rules.

B VMs can access Google APIs and services using internal IPs without external IP addresses.

C VMs can only access Google APIs if they have external IP addresses assigned.

D VMs can communicate with other VMs in different projects without VPN.

💡 Hint

Think about how VMs without external IPs can still reach Google services.

Private Google Access allows VMs without external IP addresses to reach Google APIs and services through internal IP routing.

❓ Architecture

intermediate

Which architecture supports Private Google Access for on-premises resources?

You want on-premises servers to access Google APIs privately without using public internet. Which architecture supports this?

A Set up Cloud VPN or Cloud Interconnect with a VPC subnet that has Private Google Access enabled.

B Assign external IPs to on-premises servers and access Google APIs over the internet.

C Use a public NAT gateway in the VPC to route traffic from on-premises to Google APIs.

D Configure on-premises servers to use Google Cloud DNS only.

💡 Hint

Think about private connectivity options between on-premises and GCP.

Using Cloud VPN or Cloud Interconnect with a VPC subnet that has Private Google Access enabled allows on-premises resources to access Google APIs privately.

❓ security

advanced

What security risk exists if Private Google Access is enabled but firewall rules are too permissive?

If Private Google Access is enabled on a subnet but firewall rules allow all egress traffic, what is a potential security risk?

A VMs will lose internal network connectivity.

B VMs will be unable to access Google APIs due to firewall blocking.

C VMs might access unauthorized external internet services, bypassing intended restrictions.

D Private Google Access will disable all firewall rules automatically.

💡 Hint

Consider what happens if egress traffic is not controlled.

Permissive firewall rules can allow VMs to access external internet services beyond Google APIs, increasing attack surface.

❓ service_behavior

advanced

What happens if Private Google Access is disabled on a subnet with VMs lacking external IPs?

VMs in a subnet do not have external IP addresses. Private Google Access is disabled. What is the expected behavior when these VMs try to reach Google APIs?

A VMs cannot reach Google APIs because they lack external IPs and Private Google Access is off.

B VMs reach Google APIs through internal IP routing automatically.

C VMs access Google APIs via a default NAT gateway without Private Google Access.

D VMs can access Google APIs only if firewall rules allow all egress.

💡 Hint

Think about how VMs without external IPs connect to Google services.

Without Private Google Access or external IPs, VMs cannot reach Google APIs because there is no route for the traffic.

✅ Best Practice

expert

Which is the best practice to securely enable Private Google Access for multiple projects in an organization?

You manage multiple GCP projects in an organization. You want to enable Private Google Access securely and consistently across projects. What is the best practice?

A Use Cloud NAT in each project and disable Private Google Access.

B Enable Private Google Access individually on each project’s subnet without central control.

C Assign external IPs to all VMs and disable Private Google Access to simplify management.

D Use Shared VPC with centrally managed subnets having Private Google Access enabled and restrict IAM roles accordingly.

💡 Hint

Consider centralized network management and security controls.

Using Shared VPC allows central control of network resources including Private Google Access, improving security and consistency.