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[General] Professional-Cloud-Database-Engineer Accurate Prep Material | Professional-Cloud

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【General】 Professional-Cloud-Database-Engineer Accurate Prep Material | Professional-Cloud

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Google Professional-Cloud-Database-Engineer Certification Exam is a valuable certification that demonstrates the candidate's ability to design, develop, and manage databases on Google Cloud Platform. It is a challenging exam that requires candidates to have hands-on experience and a deep understanding of database concepts. Candidates who pass the exam will be recognized as experts in Google Cloud databases and will gain a competitive edge in the job market.
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Google Cloud Certified - Professional Cloud Database Engineer Sample Questions (Q91-Q96):NEW QUESTION # 91
Your company uses Bigtable for a user-facing application that displays a low-latency real-time dashboard. You need to recommend the optimal storage type for this read-intensive database. What should you do?
  • A. Recommend splitting the Bigtable instance into two instances in order to load balance the concurrent reads.
  • B. Recommend hard disk drives (HDD).
  • C. Recommend mixed storage types.
  • D. Recommend solid-state drives (SSD).
Answer: D
Explanation:
if you plan to store extensive historical data for a large number of remote-sensing devices and then use the data to generate daily reports, the cost savings for HDD storage might justify the performance tradeoff. On the other hand, if you plan to use the data to display a real-time dashboard, it probably would not make sense to use HDD storage-reads would be much more frequent in this case, and reads that are not scans are much slower with HDD storage.

NEW QUESTION # 92
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?
  • A. Use Database Migration Service to migrate your database.
  • B. Create a hot standby on Compute Engine, and use PgBouncer to switch over the connections.
  • C. Create a read replica on Cloud SQL, and then promote it to a read/write standalone instance.
  • D. Perform a full backup of your on-premises PostgreSQL, and then, in the migration window, perform an incremental backup.
Answer: B
Explanation:
PgBouncer maintains a pool for connections for each database and user combination. PgBouncer either creates a new database connection for a client or reuses an existing connection for the same user and database.
+ PgBouncer is a simple PostgreSQLconnection pool that allows for several thousand connections at a time.
Using Kubernetes Engine to run a Helm Chart w/ PgBouncer based on the great article from futuretech- industries, we were able to set up an easily deployable system to get the most out of our CloudSQL DBs without breaking the bank.https://medium.com/google-cloud/ ... sql-postgresql-max- connections-w-pgbouncer-kubernetes-engine-49b0b2894820#:~:text=That%20is%20where,breaking%20the%
20bank.

NEW QUESTION # 93
You are managing a Cloud SQL for PostgreSQL instance in Google Cloud. You need to test the high availability of your Cloud SQL instance by performing a failover. You want to use the cloud command.
What should you do?
  • A. Use gcloud sql instances failover <ReplicaInstanceName>.
  • B. Use gcloud sql instances promote-replica <ReplicaInstanceName>.
  • C. Use gcloud sql instances promote-replica <rimaryInstanceName>.
  • D. Use gcloud sql instances failover <rimaryInstanceName>.
Answer: B

NEW QUESTION # 94
You are choosing a database backend for a new application. The application will ingest data points from IoT sensors. You need to ensure that the application can scale up to millions of requests per second with sub-10ms latency and store up to 100 TB of history. What should you do?
  • A. Use Bigtable, and add nodes as necessary to achieve the required throughput.
  • B. Use Memorystore for Memcached, and add nodes as necessary to achieve the required throughput.
  • C. Use Firestore, and rely on automatic serverless scaling.
  • D. Use Cloud SQL with read replicas for throughput.
Answer: B

NEW QUESTION # 95
You are the database administrator of a Cloud SQL for PostgreSQL instance that has pgaudit disabled. Users are complaining that their queries are taking longer to execute and performance has degraded over the past few months. You need to collect and analyze query performance data to help identity slow-running queries. What should you do?
  • A. Use the Query Insights dashboard to identify high execution times.
  • B. White a Logs Explorer query to identify database queries with high execution times.
  • C. View Cloud SQL operations to view historical query information.
  • D. Review application logs to identify database calls.
Answer: A
Explanation:
A Cloud SQL instance configured for HA is also called a regional instance and has a primary and secondary zone within the configured region. Within a regional instance, the configuration is made up of a primary instance and a standby instance. Through synchronous replication to each zone's persistent disk, all writes made to the primary instance are replicated to disks in both zones before a transaction is reported as committed. In the event of an instance or zone failure, the standby instance becomes the new primary instance. Users are then rerouted to the new primary instance. This process is called a failover.

NEW QUESTION # 96
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