20+ practice questions focused on Deploy Scalable and Highly Available Databases in Google Cloud — one of the most tested topics on the Google Professional Cloud Developer exam. Each question includes a detailed explanation so you learn why the right answer is correct.
Start Deploy Scalable and Highly Available Databases in Google Cloud PracticeAn engineer needs to create a Cloud SQL MySQL instance that can automatically failover to a standby in a different zone within the same region. Which configuration should be used?
Explanation: Cloud SQL HA configuration creates a primary and a standby instance in different zones within the same region. The standby is synchronously replicated and automatic failover occurs in under 60 seconds. Cross-region failover is not supported; read replicas are for read scaling and DR, not automatic failover. Zonal availability is a single-zone instance without HA.
A company runs a critical PostgreSQL database on Cloud SQL. They want to enforce that all client connections use SSL/TLS encryption. Which step is necessary to ensure this?
Explanation: Cloud SQL provides a server-side SSL certificate and optionally enforces encryption using the 'require_ssl' flag (or 'cloudsql.ssl_mode' in newer versions). IAM authentication does not enforce SSL. The Auth Proxy uses SSL by default but does not enforce it at the database level. Private IP alone does not encrypt traffic.
A company uses Cloud Spanner with an instance configured with 1000 processing units. They notice that high-priority CPU utilization consistently exceeds 65% during peak hours, causing increased latency. They want to auto-scale based on this metric. Which scaling configuration should they use?
Explanation: Cloud Spanner autoscaling uses processing units (not nodes) and allows setting a target for high-priority CPU utilization. Setting a minimum of 1000 processing units ensures a baseline, and a maximum of 2000 allows scaling up. The target high-priority CPU utilization (e.g., 65%) triggers scaling. Node-based options are not used with processing units.
A company is migrating an on-premises Oracle database to Cloud SQL for PostgreSQL. They require a deployment that supports up to 30,000 transactions per second (TPS) and provides automatic storage scaling. Which instance configuration should they choose?
Explanation: Cloud SQL supports storage auto-increase regardless of machine type. For high TPS, a high-memory machine type (e.g., highmem) provides more memory per CPU, which can improve performance for database workloads. SSD is required for consistent performance. HDD is not recommended for production.
An engineer is using Firestore Security Rules for a mobile app. They want to ensure that a user can only read their own documents, where each document has a field 'userId' matching the user's authenticated UID. Which rule is correct?
Explanation: Firestore Security Rules use the `request.auth.uid` variable to get the authenticated user's UID and `resource.data.userId` to access the document field. The correct condition checks that the document's 'userId' equals the requester's UID. `request.resource` refers to incoming data, not existing data.
+15 more Deploy Scalable and Highly Available Databases in Google Cloud questions available
Practice all Deploy Scalable and Highly Available Databases in Google Cloud questions1. Baseline your knowledge
Start with 10 questions to gauge your current understanding of Deploy Scalable and Highly Available Databases in Google Cloud. This tells you whether you need a concept refresher or just practice.
2. Review every explanation
For each question — right or wrong — read the full explanation. Understanding why an answer is correct is more valuable than knowing the answer itself.
3. Focus on exam traps
Deploy Scalable and Highly Available Databases in Google Cloud questions on the PCD frequently use trap wording. Look for subtle differences in answers that test your precision, not just general knowledge.
4. Reach 80% consistently
Do repeated sessions until you score 80%+ three times in a row. Then move to mixed-mode practice to test cross-topic recall under realistic conditions.
The exact number varies per candidate. Deploy Scalable and Highly Available Databases in Google Cloud is tested as part of the Google Professional Cloud Developer blueprint. Practicing with targeted Deploy Scalable and Highly Available Databases in Google Cloud questions ensures you can handle any format or difficulty that appears.
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