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Google Cloud Certified - Professional Cloud Database Engineer Sample Questions (Q176-Q181):

NEW QUESTION # 176
You have a large Cloud SQL for PostgreSQL instance. The database instance is not mission-critical, and you want to minimize operational costs. What should you do to lower the cost of backups in this environment?

A. Set the automated backups to occur every other day to lower the frequency of backups.
B. Reduce the number of automated backups that are retained to two (2).
C. Select a different region to store your backups.
D. Change the storage tier of the automated backups from solid-state drive (SSD) to hard disk drive (HDD).

Answer: B

Explanation:
By default, for each instance, Cloud SQL retains seven automated backups, in addition to on-demand backups. You can configure how many automated backups to retain (from 1 to 365). We charge a lower rate for backup storage than for other types of instances. https://cloud.google.com/sql/docs/mysql/backup-recovery
/backups

NEW QUESTION # 177
You are designing a new gaming application that uses a highly transactional relational database to store player authentication and inventory data in Google Cloud. You want to launch the game in multiple regions. What should you do?

A. Use Cloud SQL with a regional read replica to deploy the database.
B. Use Bigtable with clusters in multiple regions to deploy the database
C. Use BigQuery to deploy the database
D. Use Cloud Spanner to deploy the database.

Answer: C

NEW QUESTION # 178
You work for a financial services company that wants to use fully managed database services. Traffic volume for your consumer services products has increased annually at a constant rate with occasional spikes around holidays. You frequently need to upgrade the capacity of your database. You want to use Cloud Spanner and include an automated method to increase your hardware capacity to support a higher level of concurrency. What should you do?

A. Use direct scaling to implement the Autoscaler-based architecture.
B. Upgrade the Cloud Spanner instance on a periodic basis during the scheduled maintenance window.
C. Use linear scaling to implement the Autoscaler-based architecture
D. Set up alerts that are triggered when Cloud Spanner utilization metrics breach the threshold, and then schedule an upgrade during the scheduled maintenance window.

Answer: C

Explanation:
Linear scaling is best used with load patterns that change more gradually or have a few large peaks. The method calculates the minimum number of nodes or processing units required to keep utilization below the scaling threshold. The number of nodes or processing units added or removed in each scaling event is not limited to a fixed step amount. https://cloud.google.com/spanner/docs/autoscaling-overview#linear

NEW QUESTION # 179
You are the DBA of an online tutoring application that runs on a Cloud SQL for PostgreSQL database. You are testing the implementation of the cross-regional failover configuration. The database in region R1 fails over successfully to region R2, and the database becomes available for the application to process data. During testing, certain scenarios of the application work as expected in region R2, but a few scenarios fail with database errors. The application-related database queries, when executed in isolation from Cloud SQL for PostgreSQL in region R2, work as expected. The applicationperforms completely as expected when the database fails back to region R1. You need to identify the cause of the database errors in region R2. What should you do?

A. Determine whether the failover of Cloud SQL for PostgreSQL from region R1 to region R2 is in progress or has completed successfully.
B. Determine whether the versions of Cloud SQL for PostgreSQL in regions R1 and R2 are different.
C. Determine whether Cloud SQL for PostgreSQL in region R2 is a near-real-time copy of region R1 but not an exact copy.
D. Determine whether the database patches of Cloud SQI for PostgreSQL in regions R1 and R2 are different.

Answer: C

Explanation:
Verify that the replica has processed all the transactions it has received from the primary. This ensures that when promoted, the replica reflects all transactions that were received before the primary became unavailable.
https://cloud.google.com/sql/docs/postgres/replication/cross-region-replicas#verify_failover_criteria

NEW QUESTION # 180
You are migrating a telehealth care company's on-premises data center to Google Cloud. The migration plan specifies:
PostgreSQL databases must be migrated to a multi-region backup configuration with cross-region replicas to allow restore and failover in multiple scenarios.
MySQL databases handle personally identifiable information (PII) and require data residency compliance at the regional level.
You want to set up the environment with minimal administrative effort. What should you do?

A. Set up Cloud Logging and Cloud Monitoring with Cloud Functions to send an alert every time a new database instance is created, and manually validate the region.
B. Set up Pub/Sub to ingest data from Cloud Logging, send an alert every time a new database instance is created, and manually validate the region.
C. Set up different projects for PostgreSQL and MySQL databases, and apply organizational policy constraints at a project level.
D. Set up different organizations for each database type, and apply policy constraints at the organization level.

Answer: D

NEW QUESTION # 181
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