Google ACE Ensuring Successful Operation of a Cloud Solution Practice Test 4 — 15 Questions

Question 1

You need to drain a GKE node for maintenance. The node is running a DaemonSet and some pods with emptyDir volumes. Which kubectl command should you use to safely drain the node without causing errors?

Accepted Answer

kubectl drain node-name --ignore-daemonsets --delete-emptydir-data. The kubectl drain command with --ignore-daemonsets and --delete-emptydir-data flags safely evicts pods while ignoring DaemonSets (which are managed by the node) and allowing deletion of pods with emptyDir volumes.

Answer

kubectl drain node-name --force

Answer

kubectl drain node-name --ignore-daemonsets

Answer

kubectl cordon node-name && kubectl delete pods --all --grace-period=0

Question 2

You have a Cloud Run service that is experiencing high latency. You want to analyze the latency distribution of requests. Which Google Cloud tool should you use?

Accepted Answer

Cloud Trace. Cloud Trace is a distributed tracing service that collects latency data from applications and provides detailed analysis, including latency distributions and per-request traces.

Answer

Cloud Debugger

Answer

Cloud Logging Log Explorer

Answer

Cloud Monitoring Metrics Explorer

Question 3

You need to load a CSV file from Cloud Storage into an existing BigQuery table. Which bq command should you use?

Accepted Answer

bq load --source_format=CSV mydataset.mytable gs://mybucket/myfile.csv. The bq load command loads data into a BigQuery table. You specify the source format (CSV) and the location of the file in Cloud Storage.

Answer

bq query --source_format=CSV 'SELECT * FROM mydataset.mytable'

Answer

bq insert mydataset.mytable gs://mybucket/myfile.csv

Answer

bq import mydataset.mytable gs://mybucket/myfile.csv

Question 4

You are troubleshooting a slow Pub/Sub subscription. Which three steps should you take to diagnose the issue? (Choose three.)

Accepted Answer

Check the subscription's backlog in the Pub/Sub console or via gcloud pubsub subscriptions describe. Cloud Monitoring (Metrics Explorer) can show subscription backlog, Cloud Logging can show subscriber errors, and checking the subscription's backlog via gcloud or console helps assess the issue. Cloud Trace is for HTTP-based services, not Pub/Sub directly. Cloud Debugger is for code debugging, not Pub/Sub monitoring.

Answer

Use Cloud Trace to analyze the latency of each Pub/Sub message

Answer

Use Cloud Debugger to inspect the subscriber code

Question 5

Your GKE cluster is running an older version of Kubernetes. You need to upgrade the cluster's control plane and node pools. Which two steps should you perform? (Choose two.)

Accepted Answer

Upgrade the cluster's control plane using gcloud container clusters upgrade. Upgrading a GKE cluster involves upgrading the cluster (control plane) first using gcloud container clusters upgrade, and then upgrading node pools separately (or they can be auto-upgraded). You cannot upgrade nodes without upgrading the control plane first. Draining nodes is not a step for upgrading, it's for maintenance.

Answer

Create a new cluster with the desired version and migrate workloads

Answer

Drain all nodes using kubectl drain before upgrading

Answer

Manually update the kubelet version on each node

Question 6

You need to set up an alerting policy to notify your team via email and Slack when a Compute Engine instance's CPU utilization exceeds 80% for 5 minutes. Which two resources must you configure? (Choose two.)

Accepted Answer

A metric threshold condition on the 'compute.googleapis.com/instance/cpu/utilization' metric. To create an alerting policy, you need a metric threshold condition (e.g., CPU utilization > 80% for 5 minutes) and notification channels (email, Slack). Uptime checks are for availability, not performance metrics. Log-based alerts are for log events, not metrics.

Answer

A Cloud Function to check CPU and send Slack message

Answer

An uptime check for the external IP of the instance

Answer

A log-based alert for the 'compute.googleapis.com/instance' log

Question 7

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 8

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 9

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 10

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 11

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 12

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 13

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 14

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 15

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