Question 522 of 1,446
Manage a solution that can span multiple database technologies →mediumMultiple SelectObjective-mapped
PCDE Practice Question: Manage a solution that can span multiple database technologies
A company uses Cloud Spanner for a global application. They need to capture real-time changes to certain tables for downstream processing. Which two services or features can be used together to achieve this? (Choose TWO.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Spanner change streams
Spanner change streams capture transactional changes in near real-time. Dataflow can read from change streams and stream the changes to downstream systems like Pub/Sub, BigQuery, or Cloud Storage.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Spanner change streams
Why this is correct
Change streams provide a log of row-level changes.
- ✗
Cloud Pub/Sub Lite
Why it's wrong here
While Pub/Sub can be used downstream, Spanner change streams are read via Dataflow, not directly into Pub/Sub.
- ✗
Cloud SQL for PostgreSQL
Why it's wrong here
This is a different database service, not relevant.
- ✗
Cloud Functions
Why it's wrong here
Cloud Functions cannot directly consume Spanner change streams.
- ✓
Cloud Dataflow
Why this is correct
Dataflow can read from change streams and stream changes to other services.
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Last reviewed: Jul 4, 2026
This PCDE practice question is part of Courseiva's free Google Cloud certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCDE exam.
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