Databricks Exam Databricks-Certified-Data-Engineer-Associate Topic 3 Question 39 Discussion

Actual exam question for Databricks's Databricks-Certified-Data-Engineer-Associate exam

Question #: 39
Topic #: 3

[All Databricks-Certified-Data-Engineer-Associate Questions]

A data engineer runs a statement every day to copy the previous day's sales into the table transactions. Each day's sales are in their own file in the location "/transactions/raw".

Today, the data engineer runs the following command to complete this task:

After running the command today, the data engineer notices that the number of records in table transactions has not changed.

Which of the following describes why the statement might not have copied any new records into the table?

AThe format of the files to be copied were not included with the FORMAT_OPTIONS keyword.

BThe names of the files to be copied were not included with the FILES keyword.

CThe previous day's file has already been copied into the table.

DThe PARQUET file format does not support COPY INTO.

EThe COPY INTO statement requires the table to be refreshed to view the copied rows.

Show Suggested Answer

Suggested Answer: B

dbfs:/user/hive/warehouse Thereby showing 'dbfs:/user/hive/warehouse/customer360.db

The location of the customer360 database depends on the value of thespark.sql.warehouse.dirconfiguration property, which specifies the default location for managed databases and tables. If the property is not set, the default value isdbfs:/user/hive/warehouse. Therefore, the customer360 database will be located indbfs:/user/hive/warehouse/customer360.db. However, if the property is set to a different value, such asdbfs:/user/hive/database, then the customer360 database will be located indbfs:/user/hive/database/customer360.db. Thus, more information is needed to determine the correct response.

Option A is not correct, asdbfs:/user/hive/database/customer360is not the default location for managed databases and tables, unless thespark.sql.warehouse.dirproperty is explicitly set todbfs:/user/hive/database.

Option B is not correct, asdbfs:/user/hive/warehouseis the default location for the root directory of managed databases and tables, not for a specific database. The database name should be appended with.dbto the directory path, such asdbfs:/user/hive/warehouse/customer360.db.

Option C is not correct, asdbfs:/user/hive/customer360is not a valid location for a managed database, as it does not follow the directory structure specified by thespark.sql.warehouse.dirproperty.

Databases and Tables

[Databricks Data Engineer Professional Exam Guide]

by Thad at Sep 17, 2024, 12:18 AM

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1 months ago

I'm with Tracey on this one. C) is the way to go. Although, if the data engineer is running this command every day, they might want to consider automating the process. Less work for them, you know?

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Arlette

12 days ago

Automation would definitely save time and prevent errors in this case.

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Pearly

15 days ago

Yeah, I agree. It's possible that the data engineer is just duplicating the same data every day.

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Sol

23 days ago

I think C) makes sense. The file might have already been copied before.

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2 months ago

I think the answer is C) The previous day's file has already been copied into the table. The command runs every day, so it's likely that the previous day's file has already been copied.

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