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?

Options :

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?

Options :

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

Your organization stores marketing data such as customer preferences and purchase history on Bigtable. The consumers of this database are predominantly data analysts and operations users. You receive a service ticket from the database operations department citing poor database performance between 9 AM-10 AM every day. Theapplication team has confirmed no latency from their logs. A new cohort of pilot users that is testing a dataset loaded from a third-party data provider is experiencing poor database performance. Other users are not affected. You need to troubleshoot the issue. What should you do?

Options :

A : Isolate the data analysts and operations user groups to use different Bigtable instances.

B : Check the Cloud Monitoring table/bytes_used metric from Bigtable.

C : Use Key Visualizer for Bigtable.

D : Add more nodes to the Bigtable cluster.

Answer: C

Question 4

You need to migrate a 1 TB PostgreSQL database from a Compute Engine VM to Cloud SQL for PostgreSQL. You want to ensure that there is minimal downtime during the migration. What should you do?

Options :

A : Export the data from the existing database, and load the data into a new Cloud SQL database.

B : Use Migrate for Compute Engine to complete the migration.

C : Use Datastream to complete the migration.

D : Use Database Migration Service to complete the migration.

Answer: D

Question 5

Your company is shutting down their data center and migrating several MySQL and PostgreSQL databases to Google Cloud. Your database operations team is severely constrained by ongoing production releases and the lack of capacity for additional on-premises backups. You want to ensure that the scheduled migrations happen with minimal downtime and that the Google Cloud databases stay in sync with the on-premises data changes until the applications can cut over. What should you do? (Choose two.)

Options :

A : Use an external read replica to migrate the databases to Cloud SQL.

B : Use a read replica to migrate the databases to Cloud SQL.

C : Use Database Migration Service to migrate the databases to Cloud SQL.

D : Use a cross-region read replica to migrate the databases to Cloud SQL.

E : Use replication from an external server to migrate the databases to Cloud SQL.

Answer: C,E

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