Google Professional Cloud Database Engineer Pcdb Practice Test - Set 1
Test your knowledge with this Google Professional Cloud Database Engineer Pcdb mock exam. Get real-world IT questions and prepare for certification success.
Google Professional Cloud Database Engineer (PCDB) - Exam Information
Exam Information
Exam Code
Google Professional Cloud Database Engineer Pcdb
Exam Title
Google Professional Cloud Database Engineer (PCDB)
Vendor
Google
Difficulty
Advanced
Duration
120 Minutes
Question Format
Multiple Choice
Last Updated
March 12, 2025
Tests knowledge of designing, optimizing, and operating databases in Google Cloud.
3. Which Google Cloud database service provides global consistency and horizontal scalability?
Cloud Spanner
Cloud SQL
Firestore
Bigtable
✅ Correct Answer: Cloud Spanner
4. What is the purpose of Google Cloud's Memorystore?
To provide managed Redis and Memcached services
To store relational data
To manage NoSQL databases
To handle time-series data
✅ Correct Answer: To provide managed Redis and Memcached services
5. Which Google Cloud database service is optimized for time-series data?
Bigtable
Cloud SQL
Firestore
Spanner
✅ Correct Answer: Bigtable
6. What is the role of Google Cloud's Firestore?
To store and sync NoSQL documents
To manage relational databases
To handle time-series data
To provide in-memory caching
✅ Correct Answer: To store and sync NoSQL documents
7. Which Google Cloud database service supports SQL queries?
Cloud SQL
Bigtable
Firestore
Memorystore
✅ Correct Answer: Cloud SQL
8. What is the purpose of Google Cloud's Cloud Spanner?
To provide a globally distributed relational database
To manage NoSQL documents
To handle time-series data
To provide in-memory caching
✅ Correct Answer: To provide a globally distributed relational database
9. Which Google Cloud database service is best for OLTP workloads?
Cloud SQL
Bigtable
Firestore
Spanner
✅ Correct Answer: Cloud SQL
10. What is the role of Google Cloud's Bigtable?
To handle large-scale, low-latency workloads
To manage relational databases
To store NoSQL documents
To provide in-memory caching
✅ Correct Answer: To handle large-scale, low-latency workloads
11. Which Google Cloud database service provides automatic sharding?
Cloud Spanner
Cloud SQL
Firestore
Bigtable
✅ Correct Answer: Cloud Spanner
12. What is the purpose of Google Cloud's Firestore indexing?
To enable fast querying of NoSQL documents
To manage relational data
To handle time-series data
To provide in-memory caching
✅ Correct Answer: To enable fast querying of NoSQL documents
13. Which Google Cloud database service is best for OLAP workloads?
BigQuery
Cloud SQL
Firestore
Spanner
✅ Correct Answer: BigQuery
14. What is the role of Google Cloud's Cloud SQL?
To provide managed relational databases
To handle NoSQL documents
To manage time-series data
To provide in-memory caching
✅ Correct Answer: To provide managed relational databases
15. Which Google Cloud database service is best for real-time analytics?
Bigtable
Cloud SQL
Firestore
Spanner
✅ Correct Answer: Bigtable
16. What is the purpose of Google Cloud's Spanner replication?
To ensure high availability and global consistency
To manage NoSQL documents
To handle time-series data
To provide in-memory caching
✅ Correct Answer: To ensure high availability and global consistency
17. Which Google Cloud database service is best for mobile and web applications?
Firestore
Cloud SQL
Bigtable
Spanner
✅ Correct Answer: Firestore
18. What is the role of Google Cloud's BigQuery?
To provide a fully managed data warehouse
To manage relational databases
To handle NoSQL documents
To provide in-memory caching
✅ Correct Answer: To provide a fully managed data warehouse
19. Which Google Cloud database service is best for financial transactions?
Cloud Spanner
Cloud SQL
Firestore
Bigtable
✅ Correct Answer: Cloud Spanner
20. What is the purpose of Google Cloud's Memorystore for Redis?
To provide in-memory caching
To manage relational databases
To handle NoSQL documents
To store time-series data
✅ Correct Answer: To provide in-memory caching
21. Which database service is optimized for analytical workloads?
BigQuery
Cloud SQL
Firestore
Spanner
✅ Correct Answer: BigQuery
22. What is the primary advantage of Cloud Spanner over traditional RDBMS?
Global scalability and consistency
Lower cost
Faster single-node performance
Simpler schema design
✅ Correct Answer: Global scalability and consistency
23. Which service provides a fully managed Redis instance?
Memorystore for Redis
Cloud SQL
Bigtable
Firestore
✅ Correct Answer: Memorystore for Redis
24. What is the default replication model for Cloud SQL?
Regional (multi-zone)
Global
Single-zone
None
✅ Correct Answer: Regional (multi-zone)
25. Which database is best for IoT time-series data?
Bigtable
Cloud SQL
Firestore
Spanner
✅ Correct Answer: Bigtable
26. What is the primary use case for Firestore?
Mobile/web app document storage
Financial transactions
Data warehousing
High-frequency trading
✅ Correct Answer: Mobile/web app document storage
27. Which feature ensures high availability in Cloud Spanner?
Multi-region replication
Vertical scaling
On-demand backups
SQL compatibility
✅ Correct Answer: Multi-region replication
28. What is the purpose of Bigtable’s row keys?
To enable fast lookups and sorting
To enforce relational integrity
To manage backups
To encrypt data
✅ Correct Answer: To enable fast lookups and sorting
29. Which database service supports ACID transactions globally?
Cloud Spanner
Bigtable
Firestore
Memorystore
✅ Correct Answer: Cloud Spanner
30. What is the primary benefit of Memorystore?
Sub-millisecond latency for cached data
Unlimited storage
SQL query support
Global replication
✅ Correct Answer: Sub-millisecond latency for cached data
31. Which database is schema-less?
Firestore
Cloud SQL
Spanner
BigQuery
✅ Correct Answer: Firestore
32. What is the role of BigQuery’s partitioning?
To improve query performance on large datasets
To encrypt data
To manage backups
To enforce ACID compliance
✅ Correct Answer: To improve query performance on large datasets
33. Which service is best for storing session data?
Memorystore for Redis
Cloud SQL
Bigtable
Spanner
✅ Correct Answer: Memorystore for Redis
34. What is the primary use case for Cloud SQL?
Traditional relational workloads
Petabyte-scale analytics
Real-time ad serving
Document storage
✅ Correct Answer: Traditional relational workloads
35. Which database supports SQL and JSON data?
Cloud Spanner
Bigtable
Memorystore
Firestore
✅ Correct Answer: Cloud Spanner
36. What is the purpose of Firestore’s offline mode?
To sync data when devices reconnect
To improve query performance
To reduce costs
To encrypt data
✅ Correct Answer: To sync data when devices reconnect
37. Which service is serverless for databases?
Firestore
Cloud SQL
Bigtable
Spanner
✅ Correct Answer: Firestore
38. What is the primary advantage of Bigtable over BigQuery?
Low-latency reads/writes
SQL support
Cost efficiency
Global replication
✅ Correct Answer: Low-latency reads/writes
39. Which database is optimized for >1TB analytical workloads?
BigQuery
Cloud SQL
Firestore
Memorystore
✅ Correct Answer: BigQuery
40. What is the role of Spanner’s TrueTime API?
To ensure global consistency
To improve query performance
To reduce costs
To manage backups
✅ Correct Answer: To ensure global consistency
41. Which database is best for user profiles in a mobile app?
Firestore
Bigtable
Spanner
Cloud SQL
✅ Correct Answer: Firestore
42. What is the primary use case for Memorystore?
Caching frequently accessed data
Storing user documents
Running analytics
Managing relational data
✅ Correct Answer: Caching frequently accessed data
43. Which service supports federated queries across datasets?
BigQuery
Cloud SQL
Spanner
Bigtable
✅ Correct Answer: BigQuery
44. What is the purpose of Cloud SQL’s failover replicas?
To ensure high availability
To reduce costs
To improve query performance
To encrypt data
✅ Correct Answer: To ensure high availability
45. Which database is best for financial transactions requiring ACID?
Cloud Spanner
Bigtable
Firestore
Memorystore
✅ Correct Answer: Cloud Spanner
46. What is the primary benefit of Firestore’s automatic scaling?
No manual sharding required
Lower latency
SQL compatibility
Stronger consistency
✅ Correct Answer: No manual sharding required
47. Which service is best for ad-tech real-time bidding?
Bigtable
Cloud SQL
Firestore
BigQuery
✅ Correct Answer: Bigtable
48. What is the role of BigQuery’s streaming inserts?
To ingest real-time data
To backup databases
To encrypt data
To manage schemas
✅ Correct Answer: To ingest real-time data
49. Which database supports both relational and document models?
Firestore
Cloud SQL
Bigtable
Spanner
✅ Correct Answer: Firestore
50. What is the primary advantage of Spanner’s horizontal scaling?
Linear performance at scale
Lower cost
Simpler management
Faster backups
✅ Correct Answer: Linear performance at scale
The Google Professional Cloud Database Engineer Pcdb certification is a globally recognized credential for IT professionals.
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