- (Topic 5)
You have an application that makes HTTP requests to Cloud Storage. Occasionally the requests fail with
HTTP status codes of 5xx and 429.
How should you handle these types of errors?

1. A. Use gRPC instead of HTTP for better performance.
2. B. Implement retry logic using a truncated exponential backoff strategy.
3. C. Make sure the Cloud Storage bucket is multi-regional for geo-redundancy.
4. D. Monitor https://status.cloud.google.com/feed.atom and only make requests if Cloud Storage is not reportingan incident.

Correct Answer: A
Reference https://cloud.google.com/storage/docs/json_api/v1/status-codes

- (Topic 5)
You are deploying an application to Google Cloud. The application is part of a system. The application in Google Cloud must communicate over a private network with applications in a non-Google Cloud environment. The expected average throughput is 200 kbps. The business requires:
• 99.99% system availability
• cost optimization
You need to design the connectivity between the locations to meet the business requirements. What should you provision?

1. A. A Classic Cloud VPN gateway connected with one tunnel to an on-premises VPN gateway.
2. B. A Classic Cloud VPN gateway connected with two tunnels to an on-premises VPN gateway.
3. C. An HA Cloud VPN gateway connected with two tunnels to an on-premises VPN gateway.
4. D. Two HA Cloud VPN gateways connected to two on-premises VPN gateway
5. E. Configure each HA CloudVPN gateway to have two tunnels, each connected to different on-premises VPN gateways.

Correct Answer: C
https://cloud.google.com/network-connectivity/docs/vpn/concepts/topologies#configurations_that_support_9999_availability

- (Topic 5)
You are creating an App Engine application that uses Cloud Datastore as its persistence layer. You need to retrieve several root entities for which you have the identifiers. You want to minimize the overhead in operations performed by Cloud Datastore. What should you do?

1. A. Create the Key object for each Entity and run a batch get operation
2. B. Create the Key object for each Entity and run multiple get operations, one operation for each entity
3. C. Use the identifiers to create a query filter and run a batch query operation
4. D. Use the identifiers to create a query filter and run multiple query operations, one operation for each entity

Correct Answer: C
https://cloud.google.com/datastore/docs/concepts/entities#datastore-datastore-batch-upsert-nodejs

- (Topic 5)
You have deployed an application to Kubernetes Engine, and are using the Cloud SQL proxy container to
make the Cloud SQL database available to the services running on Kubernetes. You are notified that the
application is reporting database connection issues. Your company policies require a post- mortem. What should you do?

1. A. Use gcloud sql instances restart.
2. B. Validate that the Service Account used by the Cloud SQL proxy container still has the Cloud Build Editor role.
3. C. In the GCP Console, navigate to Stackdriver Loggin
4. D. Consult logs for Kubernetes Engine and Cloud SQL.
5. E. In the GCP Console, navigate to Cloud SQ
6. F. Restore the latest backu
7. G. Use kubect1 to restart all pods.

Correct Answer: C

- (Topic 5)
Your company has an application running on multiple Compute Engine instances. You need to ensure that the application can communicate with an on-premises service that requires high throughput via internal IPs, while minimizing latency. What should you do?

1. A. Use OpenVPN to configure a VPN tunnel between the on-premises environment and Google Cloud.
2. B. Configure a direct peering connection between the on-premises environment and Google Cloud.
3. C. Use Cloud VPN to configure a VPN tunnel between the on-premises environment and Google Cloud.
4. D. Configure a Cloud Dedicated Interconnect connection between the on-premises environment and Google Cloud.

Correct Answer: D
Reference https://cloud.google.com/architecture/setting-up-private-access-to-cloud-apis-through-vpn-tunnels