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Professional-Cloud-Database-Engineer Google Cloud Certified - Professional Cloud Database Engineer Questions and Answers

Questions 4

You want to migrate your on-premises PostgreSQL database to Compute Engine. You need to migrate this database with the minimum downtime possible. What should you do?

Options:

A.

Perform a full backup of your on-premises PostgreSQL, and then, in the migration window, perform an incremental backup.

B.

Create a read replica on Cloud SQL, and then promote it to a read/write standalone instance.

C.

Use Database Migration Service to migrate your database.

D.

Create a hot standby on Compute Engine, and use PgBouncer to switch over the connections.

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Questions 5

Your organization works with sensitive data that requires you to manage your own encryption keys. You are working on a project that stores that data in a Cloud SQLdatabase. You need to ensure that stored data is encrypted with your keys. What should you do?

Options:

A.

Export data periodically to a Cloud Storage bucket protected by Customer-Supplied Encryption Keys.

B.

Use Cloud SQL Auth proxy.

C.

Connect to Cloud SQL using a connection that has SSL encryption.

D.

Use customer-managed encryption keys with Cloud SQL.

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Questions 6

Your organization has a security policy to ensure that all Cloud SQL for PostgreSQL databases are secure. You want to protect sensitive data by using a key that meets specific locality or residency requirements. Your organization needs to control the key's lifecycle activities. You need to ensure that data is encrypted at rest and in transit. What should you do?

Options:

A.

Create the database with Google-managed encryption keys.

B.

Create the database with customer-managed encryption keys.

C.

Create the database persistent disk with Google-managed encryption keys.

D.

Create the database persistent disk with customer-managed encryption keys.

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Questions 7

You need to issue a new server certificate because your old one is expiring. You need to avoid a restart of your Cloud SQL for MySQL instance. What should you do in your Cloud SQL instance?

Options:

A.

Issue a rollback, and download your server certificate.

B.

Create a new client certificate, and download it.

C.

Create a new server certificate, and download it.

D.

Reset your SSL configuration, and download your server certificate.

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Questions 8

You are managing a Cloud SQL for PostgreSQL instance in Google Cloud. You have a primary instance in region 1 and a read replica in region 2. After a failure of region 1, you need to make the Cloud SQL instance available again. You want to minimize data loss and follow Google-recommended practices. What should you do?

Options:

A.

Restore the Cloud SQL instance from the automatic backups in region 3.

B.

Restore the Cloud SQL instance from the automatic backups in another zone in region 1.

C.

Check "Lag Bytes" in the monitoring dashboard for the primary instance in the read replica instance. Check the replication status usingpg_catalog.pg_last_wal_receive_lsn(). Then, fail over to region 2 by promoting the read replica instance.

D.

Check your instance operational log for the automatic failover status. Look for time, type, and status of the operations. If the failover operation is successful, no action is necessary. Otherwise, manually perform gcloud sql instances failover .

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Questions 9

You are responsible for designing a new database for an airline ticketing application in Google Cloud. This application must be able to:

Work with transactions and offer strong consistency.

Work with structured and semi-structured (JSON) data.

Scale transparently to multiple regions globally as the operation grows.

You need a Google Cloud database that meets all the requirements of the application. What should you do?

Options:

A.

Use Cloud SQL for PostgreSQL with both cross-region read replicas.

B.

Use Cloud Spanner in a multi-region configuration.

C.

Use Firestore in Datastore mode.

D.

Use a Bigtable instance with clusters in multiple regions.

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Questions 10

You plan to use Database Migration Service to migrate data from a PostgreSQL on-premises instance to Cloud SQL. You need to identify the prerequisites for creating and automating the task. What should you do? (Choose two.)

Options:

A.

Drop or disable all users except database administration users.

B.

Disable all foreign key constraints on the source PostgreSQL database.

C.

Ensure that all PostgreSQL tables have a primary key.

D.

Shut down the database before the Data Migration Service task is started.

E.

Ensure that pglogical is installed on the source PostgreSQL database.

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Questions 11

You are designing a highly available (HA) Cloud SQL for PostgreSQL instance that will be used by 100 databases. Each database contains 80 tables that were migrated from your on-premises environment to Google Cloud. The applications that use these databases are located in multiple regions in the US, and you need to ensure that read and write operations have low latency. What should you do?

Options:

A.

Deploy 2 Cloud SQL instances in the us-central1 region with HA enabled, and create read replicas in us-east1 and us-west1.

B.

Deploy 2 Cloud SQL instances in the us-central1 region, and create read replicas in us-east1 and us-west1.

C.

Deploy 4 Cloud SQL instances in the us-central1 region with HA enabled, and create read replicas in us-central1, us-east1, and us-west1.

D.

Deploy 4 Cloud SQL instances in the us-central1 region, and create read replicas in us-central1, us-east1 and us-west1.

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Questions 12

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?

Options:

A.

Set the automated backups to occur every other day to lower the frequency of backups.

B.

Change the storage tier of the automated backups from solid-state drive (SSD) to hard disk drive (HDD).

C.

Select a different region to store your backups.

D.

Reduce the number of automated backups that are retained to two (2).

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Questions 13

Your organization has a production Cloud SQL for MySQL instance. Your instance is configured with 16 vCPUs and 104 GB of RAM that is running between 90% and 100% CPU utilization for most of the day. You need to scale up the database and add vCPUs with minimal interruption and effort. What should you do?

Options:

A.

Issue a gcloud sql instances patch command to increase the number of vCPUs.

B.

Update a MySQL database flag to increase the number of vCPUs.

C.

Issue a gcloud compute instances update command to increase the number of vCPUs.

D.

Back up the database, create an instance with additional vCPUs, and restore the database.

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Questions 14

You are managing a small Cloud SQL instance for developers to do testing. The instance is not critical and has a recovery point objective (RPO) of several days. You want to minimize ongoing costs for this instance. What should you do?

Options:

A.

Take no backups, and turn off transaction log retention.

B.

Take one manual backup per day, and turn off transaction log retention.

C.

Turn on automated backup, and turn off transaction log retention.

D.

Turn on automated backup, and turn on transaction log retention.

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Questions 15

Your company is migrating all legacy applications to Google Cloud. All on-premises applications are using legacy Oracle 12c databases with Oracle Real Application Cluster (RAC) for high availability (HA) and Oracle Data Guard for disaster recovery. You need a solution that requires minimal code changes, provides the same high availability you have today on-premises, and supports a low latency network for migrated legacy applications. What should you do?

Options:

A.

Migrate the databases to Cloud Spanner.

B.

Migrate the databases to Cloud SQL, and enable a standby database.

C.

Migrate the databases to Compute Engine using regional persistent disks.

D.

Migrate the databases to Bare Metal Solution for Oracle.

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Questions 16

Your organization is running a Firestore-backed Firebase app that serves the same top ten news stories on a daily basis to a large global audience. You want to optimize content delivery while decreasing cost and latency. What should you do?

Options:

A.

Enable serializable isolation in the Firebase app.

B.

Deploy a US multi-region Firestore location.

C.

Build a Firestore bundle, and deploy bundles to Cloud CDN.

D.

Create a Firestore index on the news story date.

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Questions 17

You are the primary DBA of a Cloud SQL for PostgreSQL database that supports 6 enterprise applications in production. You used Cloud SQL Insights to identify inefficient queries and now need to identify the application that is originating the inefficient queries. You want to follow Google-recommended practices. What should you do?

Options:

A.

Shut down and restart each application.

B.

Write a utility to scan database query logs.

C.

Write a utility to scan application logs.

D.

Use query tags to add application-centric database monitoring.

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Questions 18

Your customer has a global chat application that uses a multi-regional Cloud Spanner instance. The application has recently experienced degraded performance after a new version of the application was launched. Your customer asked you for assistance. During initial troubleshooting, you observed high read latency. What should you do?

Options:

A.

Use query parameters to speed up frequently executed queries.

B.

Change the Cloud Spanner configuration from multi-region to single region.

C.

Use SQL statements to analyze SPANNER_SYS.READ_STATS* tables.

D.

Use SQL statements to analyze SPANNER_SYS.QUERY_STATS* tables.

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Questions 19

You are managing a mission-critical Cloud SQL for PostgreSQL instance. Your application team is running important transactions on the database when another DBA starts an on-demand backup. You want to verify the status of the backup. What should you do?

Options:

A.

Check the cloudsql.googleapis.com/postgres.log instance log.

B.

Perform the gcloud sql operations list command.

C.

Use Cloud Audit Logs to verify the status.

D.

Use the Google Cloud Console.

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Questions 20

Your company wants to migrate an Oracle-based application to Google Cloud. The application team currently uses Oracle Recovery Manager (RMAN) to back up the database to tape for long-term retention (LTR). You need a cost-effective backup and restore solution that meets a 2-hour recovery time objective (RTO) and a 15-minute recovery point objective (RPO). What should you do?

Options:

A.

Migrate the Oracle databases to Bare Metal Solution for Oracle, and store backups on tapes on-premises.

B.

Migrate the Oracle databases to Bare Metal Solution for Oracle, and use Actifio to store backup files on Cloud Storage using the Nearline Storage class.

C.

Migrate the Oracle databases to Bare Metal Solution for Oracle, and back up the Oracle databases to Cloud Storage using the Standard Storage class.

D.

Migrate the Oracle databases to Compute Engine, and store backups on tapes on-premises.

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Questions 21

Your organization needs to migrate a critical, on-premises MySQL database to Cloud SQL for MySQL. The on-premises database is on a version of MySQL that is supported by Cloud SQL and uses the InnoDB storage engine. You need to migrate the database while preserving transactions and minimizing downtime. What should you do?

Options:

A.

Use Database Migration Service to connect to your on-premises database, and choose continuous replication.

After the on-premises database is migrated, promote the Cloud SQL for MySQL instance, and connect applications to your Cloud SQL instance.

B.

Build a Cloud Data Fusion pipeline for each table to migrate data from the on-premises MySQL database to Cloud SQL for MySQL.

Schedule downtime to run each Cloud Data Fusion pipeline.

Verify that the migration was successful.

Re-point the applications to the Cloud SQL for MySQL instance.

C.

Pause the on-premises applications.

Use the mysqldump utility to dump the database content in compressed format.

Run gsutil –m to move the dump file to Cloud Storage.

Use the Cloud SQL for MySQL import option.

After the import operation is complete, re-point the applications to the Cloud SQL for MySQL instance.

D.

Pause the on-premises applications.

Use the mysqldump utility to dump the database content in CSV format.

Run gsutil –m to move the dump file to Cloud Storage.

Use the Cloud SQL for MySQL import option.

After the import operation is complete, re-point the applications to the Cloud SQL for MySQL instance.

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Questions 22

You recently launched a new product to the US market. You currently have two Bigtable clusters in one US region to serve all the traffic. Your marketing team is planning an immediate expansion to APAC. You need to roll out the regional expansion while implementing high availability according to Google-recommended practices. What should you do?

Options:

A.

Maintain a target of 23% CPU utilization by locating:

cluster-a in zone us-central1-a

cluster-b in zone europe-west1-d

cluster-c in zone asia-east1-b

B.

Maintain a target of 23% CPU utilization by locating:

cluster-a in zone us-central1-a

cluster-b in zone us-central1-b

cluster-c in zone us-east1-a

C.

Maintain a target of 35% CPU utilization by locating:

cluster-a in zone us-central1-a

cluster-b in zone australia-southeast1-a

cluster-c in zone europe-west1-d

cluster-d in zone asia-east1-b

D.

Maintain a target of 35% CPU utilization by locating:

cluster-a in zone us-central1-a

cluster-b in zone us-central2-a

cluster-c in zone asia-northeast1-b

cluster-d in zone asia-east1-b

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Questions 23

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.

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Questions 24

You are evaluating Cloud SQL for PostgreSQL as a possible destination for your on-premises PostgreSQL instances. Geography is becoming increasingly relevant to customer privacy worldwide. Your solution must support data residency requirements and include a strategy to:

configure where data is stored

control where the encryption keys are stored

govern the access to data

What should you do?

Options:

A.

Replicate Cloud SQL databases across different zones.

B.

Create a Cloud SQL for PostgreSQL instance on Google Cloud for the data that does not need to adhere to data residency requirements. Keep the data that must adhere to data residency requirements on-premises. Make application changes to support both databases.

C.

Allow application access to data only if the users are in the same region as the Google Cloud region for the Cloud SQL for PostgreSQL database.

D.

Use features like customer-managed encryption keys (CMEK), VPC Service Controls, and Identity and Access Management (IAM) policies.

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Questions 25

Your organization operates in a highly regulated industry. Separation of concerns (SoC) and security principle of least privilege (PoLP) are critical. The operations team consists of:

Person A is a database administrator.

Person B is an analyst who generates metric reports.

Application C is responsible for automatic backups.

You need to assign roles to team members for Cloud Spanner. Which roles should you assign?

Options:

A.

roles/spanner.databaseAdmin for Person A

roles/spanner.databaseReader for Person B

roles/spanner.backupWriter for Application C

B.

roles/spanner.databaseAdmin for Person A

roles/spanner.databaseReader for Person B

roles/spanner.backupAdmin for Application C

C.

roles/spanner.databaseAdmin for Person A

roles/spanner.databaseUser for Person B

roles/spanner databaseReader for Application C

D.

roles/spanner.databaseAdmin for Person A

roles/spanner.databaseUser for Person B

roles/spanner.backupWriter for Application C

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Questions 26

You want to migrate your PostgreSQL database from another cloud provider to Cloud SQL. You plan on using Database Migration Service and need to assess the impact of any known limitations. What should you do? (Choose two.)

Options:

A.

Identify whether the database has over 512 tables.

B.

Identify all tables that do not have a primary key.

C.

Identity all tables that do not have at least one foreign key.

D.

Identify whether the source database is encrypted using pgcrypto extension.

E.

Identify whether the source database uses customer-managed encryption keys (CMEK).

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Questions 27

Your company wants to migrate its MySQL, PostgreSQL, and Microsoft SQL Server on-premises databases to Google Cloud. You need a solution that provides near-zero downtime, requires no application changes, and supports change data capture (CDC). What should you do?

Options:

A.

Use the native export and import functionality of the source database.

B.

Create a database on Google Cloud, and use database links to perform the migration.

C.

Create a database on Google Cloud, and use Dataflow for database migration.

D.

Use Database Migration Service.

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Questions 28

You host an application in Google Cloud. The application is located in a single region and uses Cloud SQL for transactional data. Most of your users are located in the same time zone and expect the application to be available 7 days a week, from 6 AM to 10PM. You want to ensure regular maintenance updates to your Cloud SQL instance without creating downtime for your users. What should you do?

Options:

A.

Configure a maintenance window during a period when no users will be on the system. Control the order of update by setting non-production instances to earlier and production instances to later.

B.

Create your database with one primary node and one read replica in the region.

C.

Enable maintenance notifications for users, and reschedule maintenance activities to a specific time after notifications have been sent.

D.

Configure your Cloud SQL instance with high availability enabled.

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Questions 29

You need to migrate existing databases from Microsoft SQL Server 2016 Standard Edition on a single Windows Server 2019 Datacenter Edition to a single Cloud SQL for SQL Server instance. During the discovery phase of your project, you notice that your on-premises server peaks at around 25,000 read IOPS. You need to ensure that your Cloud SQL instance is sized appropriately to maximize read performance. What should you do?

Options:

A.

Create a SQL Server 2019 Standard on Standard machine type with 4 vCPUs, 15 GB of RAM, and 800 GB of solid-state drive (SSD).

B.

Create a SQL Server 2019 Standard on High Memory machine type with at least 16 vCPUs, 104 GB of RAM, and 200 GB of SSD.

C.

Create a SQL Server 2019 Standard on High Memory machine type with 16 vCPUs, 104 GB of RAM, and 4 TB of SSD.

D.

Create a SQL Server 2019 Enterprise on High Memory machine type with 16 vCPUs, 104 GB of RAM, and 500 GB of SSD.

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Questions 30

Your company is using Cloud SQL for MySQL with an internal (private) IP address and wants to replicate some tables into BigQuery in near-real time for analytics and machine learning. You need to ensure that replication is fast and reliable and uses Google-managed services. What should you do?

Options:

A.

Develop a custom data replication service to send data into BigQuery.

B.

Use Cloud SQL federated queries.

C.

Use Database Migration Service to replicate tables into BigQuery.

D.

Use Datastream to capture changes, and use Dataflow to write those changes to BigQuery.

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Questions 31

You are building an Android game that needs to store data on a Google Cloud serverless database. The database will log user activity, store user preferences, and receive in-game updates. The target audience resides in developing countries that have intermittent internet connectivity. You need to ensure that the game can synchronize game data to the backend database whenever an internet network is available. What should you do?

Options:

A.

Use Firestore.

B.

Use Cloud SQL with an external (public) IP address.

C.

Use an in-app embedded database.

D.

Use Cloud Spanner.

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Questions 32

Your company is developing a 24/7. global, real-lime analytics platform that needs to store and process large amounts of versioned time-series data. You need to

design a platform that Is highly scalable to accommodate traffic spikes and ensure high availability for mission-critical operations. What should you do?

Options:

A.

Implement a single-cluster Bigtable Instance with autoscaling enabled and row key design

B.

Implement a multi-cluster Bigtable Instance with autoscaling enabled and optimal schema design.

C.

Implement a multi-cluster Billable instance across multiple regions with replication.

D.

implement AlloyDB for PostgreSQL to handle the analytical workload using read replica

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Questions 33

You are running a transactional application on Cloud SQL for PostgreSQL in Google Cloud. The database is running in a high availability configuration within one region. You have encountered issues with data and want to restore to the last known pristine version of the database. What should you do?

Options:

A.

Create a clone database from a read replica database, and restore the clone in the same region.

B.

Create a clone database from a read replica database, and restore the clone into a different zone.

C.

Use the Cloud SQL point-in-time recovery (PITR) feature. Restore the copy from two hours ago to a new database instance.

D.

Use the Cloud SQL database import feature. Import last week's dump file from Cloud Storage.

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Questions 34

Your digital-native business runs its database workloads on Cloud SQL. Your website must be globally accessible 24/7. You need to prepare your Cloud SQL instance for high availability (HA). You want to follow Google-recommended practices. What should you do? (Choose two.)

Options:

A.

Set up manual backups.

B.

Create a PostgreSQL database on-premises as the HA option.

C.

Configure single zone availability for automated backups.

D.

Enable point-in-time recovery.

E.

Schedule automated backups.

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Questions 35

You need to provision several hundred Cloud SQL for MySQL instances for multiple project teams over a one-week period. You must ensure that all instances adhere to company standards such as instance naming conventions, database flags, and tags. What should you do?

Options:

A.

Automate instance creation by writing a Dataflow job.

B.

Automate instance creation by setting up Terraform scripts.

C.

Create the instances using the Google Cloud Console UI.

D.

Create clones from a template Cloud SQL instance.

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Questions 36

Your customer is running a MySQL database on-premises with read replicas. The nightly incremental backups are expensive and add maintenance overhead. You want to follow Google-recommended practices to migrate the database to Google Cloud, and you need to ensure minimal downtime. What should you do?

Options:

A.

Create a Google Kubernetes Engine (GKE) cluster, install MySQL on the cluster, and then import the dump file.

B.

Use the mysqldump utility to take a backup of the existing on-premises database, and then import it into Cloud SQL.

C.

Create a Compute Engine VM, install MySQL on the VM, and then import the dump file.

D.

Create an external replica, and use Cloud SQL to synchronize the data to the replica.

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Questions 37

You are running a large, highly transactional application on Oracle Real Application Cluster (RAC) that is multi-tenant and uses shared storage. You need a solution that ensures high-performance throughput and a low-latency connection between applications and databases. The solution must also support existing Oracle features and provide ease of migration to Google Cloud. What should you do?

Options:

A.

Migrate to Compute Engine.

B.

Migrate to Bare Metal Solution for Oracle.

C.

Migrate to Google Kubernetes Engine (GKE)

D.

Migrate to Google Cloud VMware Engine

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Questions 38

You currently have a MySQL database running on Cloud SQL with a read replica in a different zone for non-mission critical analytics workloads. You want to enable high availability (HA) for the analytic workloads while keeping costs low. What should you do?

Options:

A.

Increase the size of the read replica Instance and enable MA.

B.

Enable HA on the current read replica.

C.

Create a new HA instance in the same zone db lie primary.

D.

Create a new MA Instance in a different region than the primary.

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Questions 39

You work for a large retail and ecommerce company that is starting to extend their business globally. Your company plans to migrate to Google Cloud. You want to use platforms that will scale easily, handle transactions with the least amount of latency, and provide a reliable customer experience. You need a storage layer for sales transactions and current inventory levels. You want to retain the same relational schema that your existing platform uses. What should you do?

Options:

A.

Store your data in Firestore in a multi-region location, and place your compute resources in one of the constituent regions.

B.

Deploy Cloud Spanner using a multi-region instance, and place your compute resources close to the default leader region.

C.

Build an in-memory cache in Memorystore, and deploy to the specific geographic regions where your application resides.

D.

Deploy a Bigtable instance with a cluster in one region and a replica cluster in another geographic region.

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Questions 40

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 Google-recommended 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.

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Questions 41

You are migrating an on-premises application to Google Cloud. The application requires a high availability (HA) PostgreSQL database to support business-critical functions. Your company's disaster recovery strategy requires a recovery time objective (RTO) and recovery point objective (RPO) within 30 minutes of failure. You plan to use a Google Cloud managed service. What should you do to maximize uptime for your application?

Options:

A.

Deploy Cloud SQL for PostgreSQL in a regional configuration. Create a read replica in a different zone in the same region and a read replica in another region for disaster recovery.

B.

Deploy Cloud SQL for PostgreSQL in a regional configuration with HA enabled. Take periodic backups, and use this backup to restore to a new Cloud SQL for PostgreSQL instance in another region during a disaster recovery event.

C.

Deploy Cloud SQL for PostgreSQL in a regional configuration with HA enabled. Create a cross-region read replica, and promote the read replica as the primary node for disaster recovery.

D.

Migrate the PostgreSQL database to multi-regional Cloud Spanner so that a single region outage will not affect your application. Update the schema to support Cloud Spanner data types, and refactor the application.

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Questions 42

Your organization is currently updating an existing corporate application that is running in another public cloud to access managed database services in Google Cloud. The application will remain in the other public cloud while the database is migrated to Google Cloud. You want to follow Google-recommended practices for authentication. You need to minimize user disruption during the migration. What should you do?

Options:

A.

Use workload identity federation to impersonate a service account.

B.

Ask existing users to set their Google password to match their corporate password.

C.

Migrate the application to Google Cloud, and use Identity and Access Management (IAM).

D.

Use Google Workspace Password Sync to replicate passwords into Google Cloud.

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Exam Name: Google Cloud Certified - Professional Cloud Database Engineer
Last Update: Jun 30, 2025
Questions: 141
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