Free Google Professional-Cloud-Database-Engineer Exam Questions

Question 1

You are designing an augmented reality game for iOS and Android devices. You plan to use Cloud Spanner as the primary backend database for game state storage and player authentication. You want to track in-game rewards that players unlock at every stage of the game. During the testing phase, you discovered that costs are much higher than anticipated, but the query response times are within the SLA. You want to follow Googlerecommended practices. You need the database to be performant and highly available while you keep costs low. What should you do?

A : Manually scale down the number of nodes after the peak period has passed.

B : Use interleaving to co-locate parent and child rows.

C : Use the Cloud Spanner query optimizer to determine the most efficient way to execute the SQL query.

D : Use granular instance sizing in Cloud Spanner and Autoscaler.

Answer: D

Question 2

Your organization has strict policies on tracking rollouts to production and periodically shares this information with external auditors to meet compliance requirements. You need to enable auditing on several Cloud Spanner databases. What should you do?

A : Use replication to roll out changes to higher environments.

B : Use backup and restore to roll out changes to higher environments.

C : Use Liquibase to roll out changes to higher environments.

D : Manually capture detailed DBA audit logs when changes are rolled out to higher environments.

Answer: C

Question 3

You are designing an augmented reality game for iOS and Android devices. You plan to use Cloud Spanner as the primary backend database for game state storage and player authentication. You want to track in-game rewards that players unlock at every stage of the game. During the testing phase, you discovered that costs are much higher than anticipated, but the query response times are within the SLA. You want to follow Googlerecommended practices. You need the database to be performant and highly available while you keep costs low. What should you do?

A : Manually scale down the number of nodes after the peak period has passed.

B : Use interleaving to co-locate parent and child rows.

C : Use the Cloud Spanner query optimizer to determine the most efficient way to execute the SQL query.

D : Use granular instance sizing in Cloud Spanner and Autoscaler.

Answer: D

Question 4

Your company is migrating the existing infrastructure for a highly transactional application to Google Cloud. You have several databases in a MySQL database instance and need to decide how to transfer the data to Cloud SQL. You need to minimize the downtime for the migration of your 500 GB instance. What should you do?

A : Create a Cloud SQL for MySQL instance for your databases, and configure Datastream to stream yourdatabase changes to Cloud SQL.Select the Backfill historical data check box on your stream configuration to initiate Datastream tobackfill any data that is out of sync between the source and destination.Delete your stream when all changes are moved to Cloud SQL for MySQL, and update your applicationto use the new instance.

B : Create migration job using Database Migration Service.Set the migration job type to Continuous, and allow the databases to complete the full dump phase andstart sending data in change data capture (CDC) mode.Wait for the replication delay to minimize, initiate a promotion of the new Cloud SQL instance, andwait for the migration job to complete.Update your application connections to the new instance.

C : Create migration job using Database Migration Service.Set the migration job type to One-time, and perform this migration during a maintenance window.Stop all write workloads to the source database and initiate the dump. Wait for the dump to be loadedinto the Cloud SQL destination database and the destination database to be promoted to the primarydatabase.Update your application connections to the new instance.

D : Use the mysqldump utility to manually initiate a backup of MySQL during the application maintenancewindow.Move the files to Cloud Storage, and import each database into your Cloud SQL instance.Continue to dump each database until all the databases are migrated.Update your application connections to the new instance.

Answer: C

Question 5

You are configuring a new application that has access to an existing Cloud Spanner database. The new application reads from this database to gather statistics for a dashboard. You want to follow Googlerecommended practices when granting Identity and Access Management (IAM) permissions. What should you do?

A : Reuse the existing service account that populates this database.

B : Create a new service account, and grant it the Cloud Spanner Database Admin role.

C : Create a new service account, and grant it the Cloud Spanner Database Reader role.

D : Create a new service account, and grant it the spanner.databases.select permission.

Answer: C