DEA-C01 · Practice set 5 of 7
Platform Architecture and Core Components: 10 practice questions
10 free DEA-C01 practice questions on Platform Architecture and Core Components, with an explanation for every answer. Untimed. The full mock exam and the timed version are in the app.
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Question 1 of 10
Which description defines a data lakehouse?
- AA governance solution providing fine-grained controls for data and AI
- BA system combining benefits of data lakes and data warehouses
- CA processing engine whose compute resources also provide the storage layer
- DAn optimized storage layer limited to enforcing table schemas
Show the answer
The lakehouse is the architectural system that combines lake and warehouse benefits; Unity Catalog, Spark, and Delta Lake have narrower governance, processing, and storage responsibilities.
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Question 2 of 10
Which core component supplies ACID transactions and schema enforcement?
- AThe raw ingestion layer before files become tables
- BApache Spark as the scalable processing engine
- CUnity Catalog as the unified governance layer
- DDelta Lake as the optimized storage layer
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Delta Lake owns reliable table storage through ACID transactions and schema enforcement; governance belongs to Unity Catalog and processing belongs to Spark.
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Question 3 of 10
Which core component provides unified, fine-grained governance for data and AI?
- AStructured Streaming
- BDelta Lake
- CApache Spark
- DUnity Catalog
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Unity Catalog owns unified governance, including table registration, lineage, privacy, and privileges; the other components address storage or processing.
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Question 4 of 10
How does Apache Spark fit the Databricks lakehouse architecture?
- AIt runs as the governance engine on compute coupled permanently to storage
- BIt acts as the optimized storage layer that supplies ACID transactions
- CIt runs as the scalable processing engine on compute decoupled from storage
- DIt registers tables and applies access control lists for governed data
Show the answer
Spark supplies processing while storage remains a separate architectural responsibility; Delta Lake and Unity Catalog supply storage reliability and governance.
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Question 5 of 10
What can check for missing or unexpected data when files become Delta tables?
- ADelta Lake schema enforcement
- BUnity Catalog access control lists
- CApache Spark compute separation
- DUnity Catalog lineage tracking
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Schema enforcement evaluates the table schema during conversion to Delta; lineage and privileges answer governance questions instead.
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Question 6 of 10
A team needs to follow data as it is transformed and refined. Which capability addresses this need?
- AUnity Catalog lineage tracking
- BSpark processing with separated storage
- CDelta Lake schema enforcement
- DDelta Lake ACID transaction support
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Unity Catalog tracks lineage through refinement, whereas Delta guarantees table reliability and Spark executes transformations.
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Question 7 of 10
Which relationship helps provide the foundations for Lakeflow pipelines and Auto Loader?
- ADelta Lake replaces the need for a processing engine
- BUnity Catalog replaces Structured Streaming during ingestion
- CApache Spark couples compute permanently to Delta storage
- DStructured Streaming integrates tightly with Delta Lake
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Structured Streaming and Delta Lake work together beneath Lakeflow pipelines and Auto Loader, while governance remains a separate Unity Catalog role.
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Question 8 of 10
A transformation workload needs massively scalable processing, transactional table reliability, and compute that remains independently scalable from storage. Which arrangement meets all three constraints?
- AUse Structured Streaming with Unity Catalog and couple compute permanently to storage
- BUse Delta Lake with Unity Catalog and omit a scalable processing engine
- CUse Spark on decoupled compute with Unity Catalog as the transactional storage layer
- DUse Spark on decoupled compute with Delta Lake as the transactional storage layer
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Spark supplies scalable processing on compute decoupled from storage, while Delta Lake supplies the ACID-capable storage layer required for table reliability.
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Question 9 of 10
A pipeline receives batch and streaming files, must detect unexpected fields after table conversion, and must preserve lineage through refinement. Which design meets both control requirements?
- AUse Unity Catalog lineage and Spark transformations while leaving files outside Delta tables
- BUse Delta transactions and Unity Catalog privileges as a substitute for transformation lineage
- CUse Delta schema checks and Spark transformations without Unity Catalog lineage
- DUse Delta schema enforcement and register the tables in Unity Catalog for lineage
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Delta checks table schemas while Unity Catalog registers governed tables and traces their lineage; each component retains its own responsibility.
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Question 10 of 10
An organization wants one source of truth for engineering, machine learning, and reporting, with traceability from served data back through refinement. Which arrangement best fits?
- AOne lakehouse with optimized layouts but separate governance for each workload
- BOne lakehouse with optimized layouts and a unified governance model for lineage
- COne Delta storage layer with Spark processing but no lineage governance
- DSeparate lakehouses for each workload with a shared Unity Catalog governance model
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The lakehouse supports multiple workloads over shared data, and unified governance preserves lineage to the single source of truth.
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