PCDOE Practice Test 2 — 10 Questions

Question 1

A team wants to ensure zero-downtime deployments for a Cloud Run service. They plan to gradually shift traffic from the current revision to the new one. What should they configure?

Accepted Answer

Use Cloud Run's traffic splitting feature to slowly increase traffic to the new revision. Cloud Run supports traffic splitting, allowing you to gradually send a percentage of traffic to the new revision to monitor health before fully switching.

Answer

Use Cloud Build to directly replace the revision

Answer

Set traffic to 100% on the new revision gradually using multiple updates

Answer

Configure a rolling update strategy in Cloud Deploy

Question 2

A team wants to receive a notification when their monthly spending exceeds 80% of the budget. Which GCP feature should they configure?

Accepted Answer

Budget alert with threshold rule at 0.8.. Budget alerts with threshold rules trigger notifications when spending reaches specified percentages, such as 80%.

Answer

Committed use discounts.

Answer

Cloud Storage bucket for cost exports.

Answer

Cloud Monitoring cost insights dashboard.

Question 3

Which TWO are valid methods to manage service account keys securely? (Select exactly 2)

Accepted Answer

Automate key rotation using a Cloud Function.. Automating key rotation with a Cloud Function ensures service account keys are rotated on a schedule without manual intervention, reducing the risk of key exposure. This aligns with Google Cloud's best practices for key management, as it enforces rotation policies programmatically and can integrate with Secret Manager to securely store and version keys.

Answer

Rotate keys manually every 90 days.

Answer

Embed keys in application code.

Answer

Store keys in Cloud Storage with public access.

Question 4

A site reliability engineer is defining SLOs for a microservice application running on Google Kubernetes Engine. The application serves user-facing API requests. Which TWO approaches should the engineer take to effectively monitor the service's performance?

Accepted Answer

Monitor the 99th percentile of request latency directly using Cloud Monitoring custom metrics.. Monitoring the 99th percentile (p99) of request latency directly captures the experience of the slowest 1% of users, which is critical for user-facing APIs where tail latency directly impacts user satisfaction. Cloud Monitoring custom metrics allow the engineer to instrument the application to emit precise latency distributions, enabling accurate SLO tracking rather than relying on averages that mask outliers.

Answer

Monitor average latency because it is most representative of typical user experience.

Answer

Monitor container CPU utilization as a proxy for application latency.

Answer

Use the number of running pods as the primary SLO indicator.

Question 5

A company uses Compute Engine with committed use discounts for 1-year. They need to reduce costs further. What should they do?

Accepted Answer

Rightsize their VMs based on recommender recommendations.. Rightsizing based on recommender recommendations reduces resource usage without changing pricing model, offering immediate cost savings.

Answer

Use sustained use discounts instead.

Answer

Use preemptible VMs for all workloads.

Answer

Increase committed use discount term to 3 years.

Question 6

Refer to the exhibit. A DevOps engineer wants to reduce compute costs immediately. Which action is most effective?

Accepted Answer

Rightsize instance-2 from n1-standard-8 to n1-standard-4.. Rightsizing instance-2 from n1-standard-8 to n1-standard-4 reduces vCPUs from 8 to 4, directly lowering cost. The terminated instance incurs no cost, and the preemptible instance is already cost-effective. Zone changes do not affect cost.

Answer

Delete the terminated instance.

Answer

Change instance-1 to a non-preemptible instance.

Answer

Move instance-1 to a different zone.

Question 7

A company uses BigQuery for analytics with many queries scanning terabytes daily. They need to reduce query costs without reducing usage. What is the most effective strategy?

Accepted Answer

Partition and cluster tables.. Partitioning and clustering tables reduce the amount of data scanned per query, directly lowering costs.

Answer

Reserve capacity in specific regions.

Answer

Use flat-rate pricing with slots.

Answer

Use standard SQL instead of legacy SQL.

Question 8

A company uses Cloud Storage with standard storage class for all data. They want to automatically move data that has been accessed more than 30 days ago to a lower-cost storage class, and after 90 days to archive. What should they configure?

Accepted Answer

Lifecycle management rules.. Lifecycle management rules can automatically transition objects to different storage classes based on age or last access time.

Answer

Bucket lock.

Answer

Retention policy.

Answer

Object versioning.

Question 9

A team uses Cloud SQL for MySQL. They have read-heavy traffic and want to reduce costs. Which strategy is most effective?

Accepted Answer

Use read replicas to offload read queries.. Using read replicas offloads read queries from the primary instance, allowing the primary to be downsized or use a lower-tier instance, reducing cost.

Answer

Use committed use discounts.

Answer

Use High Availability with a standby instance.

Answer

Use vertical scaling to increase instance size.

Question 10

A company runs a microservices architecture on GKE and notices high network latency between services. Which THREE actions can improve inter-service communication performance?

Accepted Answer

Implement caching at the API gateway to reduce redundant requests. Implementing caching at the API gateway reduces redundant requests, which directly decreases network round trips and lowers latency for repeated data retrievals. This is a common performance optimization in microservices architectures, as it offloads backend services and minimizes inter-service chatter.

Answer

Use Istio mTLS for all service-to-service communication

Answer

Increase the number of nodes in the cluster