Cloud Dataflow is a managed service that can process both batch and streaming data
Data Communication and Computer Networks MCQ - Cloud Computing
Cloud Dataflow uses a Source of information, a series of PCollections that hold data, and a Sink, where the data will be stored or sent. PCollections are the input and output of every transform operation
Google provides quick start templates for Cloud Dataflow to allow you to rapidly deploy a number of useful data pipelines without requiring any Apache Beam programming expertise
BigQuery is a fully managed data warehouse and analytic engine. The user will never have to build servers or manage storage to make use of BigQuery.

