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Google Cloud Exams
GCP
Professional Data Engineer
Topics
Idempotency

Professional Data Engineer

Build and operate the data processing systems behind analytics and ML on Google Cloud, including BigQuery, Dataflow, and Pub/Sub, and track your readiness for the Professional Data Engineer exam.

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Advanced

Prepare and test your skills

Practice test preview

Description
Sample Question
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Practice Test

Concept

Idempotency

Topic in 7 exam domains

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Also called: idempotent

The property where an operation produces the same result regardless of how many times it is executed.

Where this appears on the exam

7 subdomains in 4 of 5 domains

Domain 1
Designing data processing systems
~22% of exam
1. 1.2Designing for reliability and fidelity
  - Making decisions related to ACID (atomicity, consistency, isolation, and durability) compliance and availability
Domain 2
Ingesting and processing the data
~25% of exam
1. 2.2Building the pipelines
  - Batch
  - Streaming (e.g., windowing, late arriving data)
Domain 4
Preparing and using data for analysis
~15% of exam
1. 4.1Preparing data for visualization
  - Precalculating fields
Domain 5
Maintaining and automating data workloads
~18% of exam

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Last updated October 24, 2026

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