Google ACE Ensuring Successful Operation of a Cloud Solution Practice Test 3 — 15 Questions

Question 1

You need to alert when the CPU utilization of your Compute Engine instance exceeds 80% for 5 minutes. What should you create in Cloud Monitoring?

Accepted Answer

A metric threshold alerting policy. A metric threshold alerting policy triggers when a metric crosses a threshold for a specified duration.

Answer

An uptime check

Answer

A log-based alert

Answer

A dashboard chart

Question 2

You are configuring an uptime check for an HTTPS endpoint that returns a JSON response. The check should validate that the response contains a specific field "status":"ok". Which uptime check option should you use?

Accepted Answer

Add a content match with a regular expression. Uptime checks can validate response content using content matching.

Answer

Enable SSL hostname verification

Answer

Configure a notification channel

Answer

Create a log-based alert for the endpoint

Question 3

Your team wants to send Cloud Monitoring alerts to a Slack channel. You have created a Pub/Sub topic and subscription. Which notification channel type should you configure in Cloud Monitoring?

Accepted Answer

Pub/Sub. Cloud Monitoring can send notifications to Pub/Sub topics, which can then be processed by a subscriber like Slack webhook.

Answer

PagerDuty

Answer

Slack

Answer

Email

Question 4

You need to find all log entries from the past hour where a Compute Engine instance failed to start. Which Cloud Logging query language filter should you use?

Accepted Answer

resource.type="gce_instance" AND severity="ERROR" AND "Could not start instance" AND timestamp>="-1h". The correct filter combines resource type, severity, and a timestamp range.

Answer

resource.type="gce_instance" AND severity="ERROR" AND "instance" AND timestamp>="-1h"

Answer

resource.type="gce_instance" AND "instance" AND timestamp>="-1h"

Answer

resource.type="gce_instance" AND severity="ERROR" AND "startup"

Question 5

You need to create a log-based metric that counts the number of 5xx errors from your application logs. The logs are in Cloud Logging and contain a field "httpRequest.status". Which filter should you use when creating the metric?

Accepted Answer

httpRequest.status >= 500. Log-based metrics use Cloud Logging filter language to select log entries.

Answer

httpRequest.status:5*

Answer

severity=ERROR AND "5xx"

Answer

httpRequest.status = 500 OR httpRequest.status = 501 OR httpRequest.status = 502

Question 6

You need to export all Cloud Logging logs from your project to BigQuery for long-term analysis. What should you create?

Accepted Answer

A log sink with destination BigQuery. Log sinks route logs to supported destinations including BigQuery.

Answer

A Cloud Monitoring dashboard

Answer

A VPC flow log

Answer

A log-based alert

Question 7

You want to stop a Compute Engine instance to reduce costs. It will be started again in a few hours. Which command should you use?

Accepted Answer

gcloud compute instances stop. The gcloud compute instances stop command gracefully stops the instance.

Answer

gcloud compute instances suspend

Answer

gcloud compute instances delete

Answer

gcloud compute instances reset

Question 8

You need to change the machine type of a running Compute Engine instance from n1-standard-4 to n1-standard-8. What is the correct procedure?

Accepted Answer

Stop the instance, run gcloud compute instances set-machine-type, then start the instance.. Changing machine type requires stopping the instance first.

Answer

Delete the instance and recreate it with the new machine type.

Answer

Run gcloud compute instances set-machine-type while the instance is running.

Answer

Take a snapshot, create a new instance, and attach the disk.

Question 9

You need to attach an existing 100 GB persistent disk named 'my-disk' to a Compute Engine instance 'web-server-1'. What is the correct command?

Accepted Answer

gcloud compute instances attach-disk web-server-1 --disk my-disk. The command is gcloud compute instances attach-disk.

Answer

gcloud compute instances add-disk web-server-1 --disk my-disk

Answer

gcloud compute disks attach my-disk --instance web-server-1

Answer

gcloud compute disks create my-disk --instance web-server-1

Question 10

You need to update the container image of a deployment named 'my-app' in GKE to a new version. Which command should you use?

Accepted Answer

kubectl set image deployment/my-app my-app-container=my-image:v2. kubectl set image updates the image of a deployment.

Answer

kubectl apply -f updated-deployment.yaml

Answer

kubectl update deployment my-app --image=my-image:v2

Answer

kubectl edit deployment my-app --image=my-image:v2

Question 11

You have updated a deployment in GKE, but the new pods are crashing. You want to revert to the previous working version. What should you do?

Accepted Answer

kubectl rollout undo deployment/my-app. kubectl rollout undo reverts to the previous revision.

Answer

kubectl rollout status deployment/my-app

Answer

kubectl scale deployment/my-app --replicas=0

Answer

kubectl delete deployment/my-app and recreate

Question 12

You need to drain a GKE node for maintenance, ensuring that daemonsets and pods using emptyDir volumes are handled properly. Which command should you use?

Accepted Answer

kubectl drain NODE --ignore-daemonsets --delete-emptydir-data. kubectl drain with flags ignores daemonsets and deletes emptyDir pods.

Answer

kubectl taint nodes NODE key=value:NoSchedule

Answer

kubectl delete node NODE

Answer

kubectl cordon NODE && kubectl delete pods --all

Question 13

You are configuring a log sink to export logs to Cloud Storage for compliance. Which TWO permissions are required for the sink's destination bucket? (Choose TWO.)

Accepted Answer

storage.objectViewer. The sink needs storage.objectCreator and storage.objectViewer to write and manage objects.

Answer

storage.legacyBucketReader

Answer

storage.admin

Answer

storage.legacyBucketWriter

Question 14

Your Cloud Run service has a new revision that you want to gradually shift traffic to. You want to send 10% of traffic to the new revision and 90% to the current one. Which TWO steps are required? (Choose TWO.)

Accepted Answer

Create the new revision by updating the service with a new image tag.. You first create the new revision (by updating the service) and then modify traffic percentages.

Answer

Set a new default URL for the new revision.

Answer

Delete the old revision.

Answer

Enable VPC ingress for the new revision.

Question 15

You are troubleshooting a Pub/Sub subscription that is not delivering messages promptly. Which THREE factors should you investigate? (Choose THREE.)

Accepted Answer

The subscription's backlog size. Common causes include backlog, subscriber latency, and ack deadlines.

Answer

The topic's retention duration

Answer

The message ordering key