Databricks-Certified-Data-Engineer-Professional 試験問題を無料オンラインアクセス

Which statement describes a key benefit of an end-to-end test?

• A.It pinpoint errors in the building blocks of your application.
• B.It provides testing coverage for all code paths and branches.
• C.It makes it easier to automate your test suite
• D.It closely simulates real world usage of your application.

A distributed team of data analysts share computing resources on an interactive cluster with autoscaling configured. In order to better manage costs and query throughput, the workspace administrator is hoping to evaluate whether cluster upscaling is caused by many concurrent users or resource-intensive queries.
In which location can one review the timeline for cluster resizing events?

• A.Workspace audit logs
• B.Executor's log file
• C.Driver's log file
• D.Cluster Event Log
• E.Ganglia

A data engineer has a Delta table orders with deletion vectors enabled. The engineer executes the following command:
DELETE FROM orders WHERE status = 'cancelled';
What should be the behavior of deletion vectors when the command is executed?

• A.Rows are marked as deleted in metadata, not in files.
• B.Delta automatically removes all cancelled orders permanently.
• C.Rows are marked as deleted both in metadata and in files.
• D.Files are physically rewritten without the deleted rows.

Predictive Optimization is an automated Databricks service enabled by default for Unity Catalog Managed tables. It helps maintain Delta tables by continuously optimizing them to ensure optimal performance and costs. Which two operations does Predictive Optimization run to maintain the Delta tables? (Choose two.)

• A.ANALYZE
• B.BUCKETING
• C.OPTIMIZE
• D.PARTITION BY
• E.COMPACT

Which of the following technologies can be used to identify key areas of text when parsing Spark Driver log4j output?

• A.Julia
• B.Scala Datasets
• C.C++
• D.Regex
• E.pyspsark.ml.feature