Google Professional-Cloud-Database-Engineer Training Materials | Professional-Cloud-Database-Engineer Study Reference

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Google Professional-Cloud-Database-Engineer Exam Syllabus Topics:

Section	Objectives
Topic 1: Manage a database solution spanning multiple systems	- Operational database management 1. Monitoring and performance tuning 2. Backup and restore strategies 3. Capacity planning and scaling
Topic 2: Design scalable and highly available database solutions	- Design for high availability and disaster recovery 1. Replication strategies and failover design 2. Regional vs multi-regional architectures - Select appropriate database services (relational, NoSQL, analytical) 1. Firestore and document database patterns 2. Cloud SQL vs AlloyDB vs Spanner selection criteria 3. Bigtable use cases and schema design
Topic 3: Migrate data solutions to Google Cloud	- Database migration strategies 1. Lift-and-shift vs re-platforming 2. Online vs offline migration tools (e.g., Database Migration Service)
Topic 4: Ensure reliability, performance, and optimization	- Security and compliance 1. Encryption at rest and in transit 2. IAM roles and access control - Performance optimization 1. Workload tuning across database services 2. Indexing, query optimization, and caching strategies

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Google Cloud Certified - Professional Cloud Database Engineer Sample Questions (Q167-Q172):

NEW QUESTION # 167
Your organization deployed a new version of a critical application that uses Cloud SQL for MySQL with high availability (HA) and binary logging enabled to store transactional information.
The latest release of the application had an error that caused massive data corruption in your Cloud SQL for MySQL database. You need to minimize data loss. What should you do?

A. Perform a point-in-time recovery of your Cloud SQL for MySQL database, selecting a date and time before the data was corrupted.
B. Reload the Cloud SQL for MySQL database using the LOAD DATA command to load data from CSV files that were used to initialize the instance.
C. Open the Google Cloud Console, navigate to SQL > Backups, and select the last version of the automated backup before the corruption.
D. Fail over to the Cloud SQL for MySQL HA instance. Use that instance to recover the transactions that occurred before the corruption.

Answer: A

NEW QUESTION # 168
You have a Cloud SQL instance (DB-1) with two cross-region read replicas (DB-2 and DB-3). During a business continuity test, the primary instance (DB-1) was taken offline and a replica (DB-2) was promoted. The test has concluded and you want to return to the pre-test configuration. What should you do?

A. Delete DB-2 so that DB-1 automatically reverts to the primary instance.
B. Create DB-4 as a read replica in the same region as DB-1, and promote DB-4 to primary.
C. Delete DB-1, and re-create DB-1 as a read replica in the same region as DB-1.
D. Bring DB-1 back online.

Answer: B

Explanation:
If you need to have the primary instance in the zone that had the outage, you can do a failback. A failback performs the same steps as the failover, only in the opposite direction, to reroute traffic back to the original instance. To perform a failback, use the procedure in Initiating failover. https://cloud.google.com/sql/docs/mysql/high-availability#failback

NEW QUESTION # 169
You are designing a physician portal app in Node.js. This application will be used in hospitals and clinics that might have intermittent internet connectivity. If a connectivity failure occurs, the app should be able to query the cached dat a. You need to ensure that the application has scalability, strong consistency, and multi-region replication. What should you do?

A. Use Firestore and ensure that the PersistenceEnabled option is set to true.
B. Use Table.read with the exactStaleness option to perform a read of rows in Cloud Spanner.
C. Use Pub/Sub to synchronize the changes from the application to Cloud Spanner.
D. Use Memorystore for Memcached.

Answer: C

NEW QUESTION # 170
Your online delivery business that primarily serves retail customers uses Cloud SQL for MySQL for its inventory and scheduling application. The required recovery time objective (RTO) and recovery point objective (RPO) must be in minutes rather than hours as a part of your high availability and disaster recovery design. You need a high availability configuration that can recover without data loss during a zonal or a regional failure. What should you do?

A. Set up all read replicas in the same region as the primary instance with synchronous replication.
B. Set up all read replicas in a different region using asynchronous replication.
C. Set up read replicas in different zones of the same region as the primary instance with synchronous replication, and set up read replicas in different regions with asynchronous replication.
D. Set up read replicas in different zones of the same region as the primary instance with asynchronous replication, and set up read replicas in different regions with synchronous replication.

Answer: C

Explanation:
This answer meets the RTO and RPO requirements by using synchronous replication within the same region, which ensures that all writes made to the primary instance are replicated to disks in both zones before a transaction is reported as committed1. This minimizes data loss and downtime in case of a zonal or an instance failure, and allows for a quick failover to the standby instance1.
This answer also meets the high availability and disaster recovery requirements by using asynchronous replication across different regions, which ensures that the data changes made to the primary instance are replicated to the read replicas in other regions with minimal delay2. This provides additional redundancy and backup in case of a regional failure, and allows for a manual failover to the read replica in another region2.

NEW QUESTION # 171
You have a Cloud SQL instance (DB-1) with two cross-region read replicas (DB-2 and DB-3). During a business continuity test, the primary instance (DB-1) was taken offline and a replica (DB-2) was promoted. The test has concluded and you want to return to the pre-test configuration. What should you do?

A. Delete DB-2 so that DB-1 automatically reverts to the primary instance.
B. Delete DB-1, and re-create DB-1 as a read replica in the same region as DB-1.
C. Create DB-4 as a read replica in the same region as DB-1, and promote DB-4 to primary.
D. Bring DB-1 back online.

Answer: A

NEW QUESTION # 172
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