In order to prevent accidental commits to production data, a senior data engineer has instituted a policy that all development work will reference clones of Delta Lake tables. After testing both deep and shallow clone, development tables are created using shallow clone. A few weeks after initial table creation, the cloned versions of several tables implemented as Type 1 Slowly Changing Dimension (SCD) stop working. The transaction logs for the source tables show that vacuum was run the day before. Why are the cloned tables no longer working?
Correct Answer: C
A junior data engineer is working to implement logic for a Lakehouse table named silver_device_recordings. The source data contains 100 unique fields in a highly nested JSON structure. The silver_device_recordings table will be used downstream for highly selective joins on a number of fields, and will also be leveraged by the machine learning team to filter on a handful of relevant fields, in total, 15 fields have been identified that will often be used for filter and join logic. The data engineer is trying to determine the best approach for dealing with these nested fields before declaring the table schema. Which of the following accurately presents information about Delta Lake and Databricks that may Impact their decision-making process?
Correct Answer: D
A data engineer is testing a collection of mathematical functions, one of which calculates the area under a curve as described by another function. Which kind of the test does the above line exemplify?
Correct Answer: B
The data architect has decided that once data has been ingested from external sources into the Databricks Lakehouse, table access controls will be leveraged to manage permissions for all production tables and views. The following logic was executed to grant privileges for interactive queries on a production database to the core engineering group. GRANT USAGE ON DATABASE prod TO eng; GRANT SELECT ON DATABASE prod TO eng; Assuming these are the only privileges that have been granted to the eng group and that these users are not workspace administrators, which statement describes their privileges?
Correct Answer: D
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