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Google Professional Data Engineer (PDE) ACTUAL
PRACTICE EXAM 2026/2027 | Verified Questions
and Answers | Complex Architectural Scenarios &
Trade-off Analysis | Exam Pass Target - A+ Graded
SECTION 1: DESIGNING DATA PROCESSING SYSTEMS (15 Questions)
Q1: A retail company needs to store 500 TB of historical sales data for ad-hoc SQL analysis by
business analysts. Query performance is important, but the data is accessed infrequently
(weekly). Cost optimization is a priority. Which storage and processing solution is most
appropriate?
A. Cloud SQL with PostgreSQL and read replicas
B. BigQuery with long-term storage pricing and partitioned tables [CORRECT]
C. Cloud Bigtable with HDD storage
D. Cloud Storage with Apache Spark on Dataproc
Correct Answer: B
Q2: A gaming company needs to store player session data with high write throughput (1M+
writes/second) and low-latency reads (<10ms). The data schema is simple (player_id, timestamp,
score) and access is always by player_id. Which database service is optimal?
A. Cloud SQL with MySQL
B. Cloud Spanner
C. Cloud Bigtable [CORRECT]
D. BigQuery
Correct Answer: C
Q3: A financial services firm needs to migrate their on-premises Hadoop cluster to GCP. They
require full Hadoop ecosystem compatibility (Hive, Spark, Pig) and need to process 50 TB of
batch data daily with autoscaling. Which solution meets these requirements?
A. BigQuery with federated queries
B. Cloud Dataproc with autoscaling enabled [CORRECT]
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C. Cloud Dataflow with Apache Beam
D. Cloud Run with custom containers
Correct Answer: B
Q4: A company needs to design a data lake for storing raw data from multiple sources (CSV,
JSON, Parquet) before transformation. The solution must support fine-grained access control and
lifecycle policies to move data to cheaper storage after 90 days. Which approach is best?
A. Cloud Storage with bucket lifecycle policies and IAM conditions [CORRECT]
B. BigQuery external tables only
C. Cloud SQL with BLOB storage
D. Cloud Bigtable with column families
Correct Answer: A
Q5: An e-commerce platform needs to process clickstream data in real-time to update product
recommendations within 2 seconds. The pipeline must handle 100,000 events/second during
peak traffic and exactly-once processing semantics. Which architecture is most suitable?
A. Cloud Pub/Sub → Cloud Dataflow (Streaming) → Cloud Bigtable [CORRECT]
B. Cloud Storage → Cloud Dataproc (Batch) → BigQuery
C. Cloud SQL → Cloud Functions → Cloud Memorystore
D. Cloud Pub/Sub → Cloud Run → Cloud SQL
Correct Answer: A
Q6: A healthcare organization needs to store patient records with strict HIPAA compliance
requirements. They require customer-managed encryption keys and audit logging of all data
access. Which storage solution with what security configuration is appropriate?
A. Cloud Storage with CMEK and Cloud Audit Logs [CORRECT]
B. Cloud Storage with Google-managed keys only
C. Cloud Bigtable with default encryption
D. BigQuery without column-level security
Correct Answer: A
Google Professional Data Engineer (PDE) ACTUAL
PRACTICE EXAM 2026/2027 | Verified Questions
and Answers | Complex Architectural Scenarios &
Trade-off Analysis | Exam Pass Target - A+ Graded
SECTION 1: DESIGNING DATA PROCESSING SYSTEMS (15 Questions)
Q1: A retail company needs to store 500 TB of historical sales data for ad-hoc SQL analysis by
business analysts. Query performance is important, but the data is accessed infrequently
(weekly). Cost optimization is a priority. Which storage and processing solution is most
appropriate?
A. Cloud SQL with PostgreSQL and read replicas
B. BigQuery with long-term storage pricing and partitioned tables [CORRECT]
C. Cloud Bigtable with HDD storage
D. Cloud Storage with Apache Spark on Dataproc
Correct Answer: B
Q2: A gaming company needs to store player session data with high write throughput (1M+
writes/second) and low-latency reads (<10ms). The data schema is simple (player_id, timestamp,
score) and access is always by player_id. Which database service is optimal?
A. Cloud SQL with MySQL
B. Cloud Spanner
C. Cloud Bigtable [CORRECT]
D. BigQuery
Correct Answer: C
Q3: A financial services firm needs to migrate their on-premises Hadoop cluster to GCP. They
require full Hadoop ecosystem compatibility (Hive, Spark, Pig) and need to process 50 TB of
batch data daily with autoscaling. Which solution meets these requirements?
A. BigQuery with federated queries
B. Cloud Dataproc with autoscaling enabled [CORRECT]
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C. Cloud Dataflow with Apache Beam
D. Cloud Run with custom containers
Correct Answer: B
Q4: A company needs to design a data lake for storing raw data from multiple sources (CSV,
JSON, Parquet) before transformation. The solution must support fine-grained access control and
lifecycle policies to move data to cheaper storage after 90 days. Which approach is best?
A. Cloud Storage with bucket lifecycle policies and IAM conditions [CORRECT]
B. BigQuery external tables only
C. Cloud SQL with BLOB storage
D. Cloud Bigtable with column families
Correct Answer: A
Q5: An e-commerce platform needs to process clickstream data in real-time to update product
recommendations within 2 seconds. The pipeline must handle 100,000 events/second during
peak traffic and exactly-once processing semantics. Which architecture is most suitable?
A. Cloud Pub/Sub → Cloud Dataflow (Streaming) → Cloud Bigtable [CORRECT]
B. Cloud Storage → Cloud Dataproc (Batch) → BigQuery
C. Cloud SQL → Cloud Functions → Cloud Memorystore
D. Cloud Pub/Sub → Cloud Run → Cloud SQL
Correct Answer: A
Q6: A healthcare organization needs to store patient records with strict HIPAA compliance
requirements. They require customer-managed encryption keys and audit logging of all data
access. Which storage solution with what security configuration is appropriate?
A. Cloud Storage with CMEK and Cloud Audit Logs [CORRECT]
B. Cloud Storage with Google-managed keys only
C. Cloud Bigtable with default encryption
D. BigQuery without column-level security
Correct Answer: A
