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.

Advanced

Prepare and test your skills

Advanced

Prepare and test your skills

Google Cloud feature

GroupByKey

Topic in 1 exam domain

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GroupByKey · Feature · Apache Beam
GroupByKey · Concept · Apache Beam operation

Also called: GroupByKey transform

An Apache Beam transform that ensures elements with the same key and model are located on the same worker, helping avoid memory thrashing.

Where this appears on the exam

1 subdomain in 1 of 5 domains

Domain 2
Ingesting and processing the data
~25% of exam
1. 2.2Building the pipelines
  - Streaming (e.g., windowing, late arriving data)

How learners score on this topic

Last updated October 23, 2026

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.

Advanced

Prepare and test your skills

Advanced

Prepare and test your skills

Google Cloud feature

GroupByKey

Topic in 1 exam domain

X LinkedIn Facebook Reddit

GroupByKey · Feature · Apache Beam
GroupByKey · Concept · Apache Beam operation

Also called: GroupByKey transform

An Apache Beam transform that ensures elements with the same key and model are located on the same worker, helping avoid memory thrashing.

Where this appears on the exam

1 subdomain in 1 of 5 domains

Domain 2
Ingesting and processing the data
~25% of exam
1. 2.2Building the pipelines
  - Streaming (e.g., windowing, late arriving data)

How learners score on this topic

Last updated October 23, 2026

Where this appears on the exam

Related topics

Works with

How learners score on this topic

Where this appears on the exam

Related topics

Works with

How learners score on this topic