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

Section	Objectives
Topic 1: Migrate data solutions to Google Cloud	- Database migration strategies 1. Online vs offline migration tools (e.g., Database Migration Service) 2. Lift-and-shift vs re-platforming
Topic 2: Design scalable and highly available database solutions	- Select appropriate database services (relational, NoSQL, analytical) 1. Bigtable use cases and schema design 2. Cloud SQL vs AlloyDB vs Spanner selection criteria 3. Firestore and document database patterns - Design for high availability and disaster recovery 1. Regional vs multi-regional architectures 2. Replication strategies and failover design
Topic 3: Manage a database solution spanning multiple systems	- Operational database management 1. Monitoring and performance tuning 2. Capacity planning and scaling 3. Backup and restore strategies
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 (Q24-Q29):

NEW QUESTION # 24
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?

A. Build an in-memory cache in Memorystore, and deploy to the specific geographic regions where your application resides.
B. Store your data in Firestore in a multi-region location, and place your compute resources in one of the constituent regions.
C. Deploy Cloud Spanner using a multi-region instance, and place your compute resources close to the default leader region.
D. Deploy a Bigtable instance with a cluster in one region and a replica cluster in another geographic region.

Answer: C

NEW QUESTION # 25
You are migrating an on-premises database to Spanner. There are a few tables, each with a few hundred records that do not have a primary key on the source database. You need to migrate all of the tables over to the news database while avoiding hot-spotting issues. What should you do-

A. Load the data into Spanner, and designate a primary key later based on business need.
B. Use the GENERATE_UUID()function to generate universally unique identifier (UUID) values with the STRING(36)data type when you do the migration.
C. Migrate the tables with no primary key to maintain consistency with source.
D. During the migration, swap the order of keys so that the column that contains the monotonically increasing or decreasing value is the first key par.

Answer: B

Explanation:
Using GENERATE_UUID() creates random, uniformly distributed primary keys, preventing hot- spotting in Spanner during migration.

NEW QUESTION # 26
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. 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. Create a hot standby on Compute Engine, and use PgBouncer to switch over the connections.
D. Use Database Migration Service to migrate your database.

Answer: B

NEW QUESTION # 27
During an internal audit, you realized that one of your Cloud SQL for MySQL instances does not have high availability (HA) enabled. You want to follow Google-recommended practices to enable HA on your existing instance. What should you do?

A. Shut down your existing Cloud SQL for MySQL instance, and enable HA.
B. Create a new Cloud SQL for MySQL instance, enable HA, and use the export and import option to migrate your data.
C. Create a new Cloud SQL for MySQL instance, enable HA, and use Cloud Data Fusion to migrate your data.
D. Use the gcloud instances patch command to update your existing Cloud SQL for MySQL instance.

Answer: D

NEW QUESTION # 28
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. Create DB-4 as a read replica in the same region as DB-1, and promote DB-4 to primary.
B. Delete DB-1, and re-create DB-1 as a read replica in the same region as DB-1.
C. Bring DB-1 back online.
D. Delete DB-2 so that DB-1 automatically reverts to the primary instance.

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 # 29
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