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

Concept

watermark

Topic in 1 exam domain

Also called: estimatedLowWatermark, Watermarks

A threshold in streaming execution that tracks data processing progress and can be delayed by stragglers.

Where this appears on the exam

1 objective 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 15, 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

Concept

watermark

Topic in 1 exam domain

Also called: estimatedLowWatermark, Watermarks

A threshold in streaming execution that tracks data processing progress and can be delayed by stragglers.

Where this appears on the exam

1 objective 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 15, 2026

Where this appears on the exam

Related topics

Part of

How learners score on this topic

Where this appears on the exam

Related topics

Part of

How learners score on this topic