Test - 1 Flashcards
A data organization leader is upset about the data analysis team’s reports being different from the data engineering team’s reports. The leader believes the siloed nature of their organization’s data engineering and data analysis architectures is to blame.
Which of the following describes how a data lakehouse could alleviate this issue?
A. Both teams would autoscale their work as data size evolves
B. Both teams would use the same source of truth for their work
C. Both teams would reorganize to report to the same department
D. Both teams would be able to collaborate on projects in real-time
E. Both teams would respond more quickly to ad-hoc requests
B. Both teams would use the same source of truth for their work
Which of the following describes a scenario in which a data team will want to utilize cluster pools?
A. An automated report needs to be refreshed as quickly as possible.
B. An automated report needs to be made reproducible.
C. An automated report needs to be tested to identify errors.
D. An automated report needs to be version-controlled across multiple collaborators.
E. An automated report needs to be runnable by all stakeholders.
A. An automated report needs to be refreshed as quickly as possible
Which of the following is hosted completely in the control plane of the classic Databricks architecture?
A. Worker node
B. JDBC data source
C. Databricks web application
D. Databricks Filesystem
E. Driver node
C. Databricks web application
Which of the following benefits of using the Databricks Lakehouse Platform is provided by Delta Lake?
A. The ability to manipulate the same data using a variety of languages
B. The ability to collaborate in real time on a single notebook
C. The ability to set up alerts for query failures
D. The ability to support batch and streaming workloads
E. The ability to distribute complex data operations
D. The ability to support batch and streaming workloads
Which of the following describes the storage organization of a Delta table?
A. Delta tables are stored in a single file that contains data, history, metadata, and other attributes.
B. Delta tables store their data in a single file and all metadata in a collection of files in a separate location.
C. Delta tables are stored in a collection of files that contain data, history, metadata, and other attributes.
D. Delta tables are stored in a collection of files that contain only the data stored within the table.
E. Delta tables are stored in a single file that contains only the data stored within the table.
C. Delta tables are stored in a collection of files that contain data, history, metadata, and other attributes.
Which of the following code blocks will remove the rows where the value in column age is greater than 25 from the existing Delta table my_table and save the updated table?
A. SELECT * FROM my_table WHERE age > 25;
B. UPDATE my_table WHERE age > 25;
C. DELETE FROM my_table WHERE age > 25;
D. UPDATE my_table WHERE age <= 25;
E. DELETE FROM my_table WHERE age <= 25;
C. DELETE FROM my_table WHERE age > 25;
A data engineer has realized that they made a mistake when making a daily update to a table. They need to use Delta time travel to restore the table to a version that is 3 days old. However, when the data engineer attempts to time travel to the older version, they are unable to restore the data because the data files have been deleted.
Which of the following explains why the data files are no longer present?
A. The VACUUM command was run on the table
B. The TIME TRAVEL command was run on the table
C. The DELETE HISTORY command was run on the table
D. The OPTIMIZE command was nun on the table
E. The HISTORY command was run on the table
A. The VACUUM command was run on the table
Which of the following Git operations must be performed outside of Databricks Repos?
A. Commit
B. Pull
C. Push
D. Clone
E. Merge
E. Merge
Which of the following data lakehouse features results in improved data quality over a traditional data lake?
A. A data lakehouse provides storage solutions for structured and unstructured data.
B. A data lakehouse supports ACID-compliant transactions.
C. A data lakehouse allows the use of SQL queries to examine data.
D. A data lakehouse stores data in open formats.
E. A data lakehouse enables machine learning and artificial Intelligence workloads.
B. A data lakehouse supports ACID-compliant transactions.
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A data engineer has left the organization. The data team needs to transfer ownership of the data engineer’s Delta tables to a new data engineer. The new data engineer is the lead engineer on the data team.
Assuming the original data engineer no longer has access, which of the following individuals must be the one to transfer ownership of the Delta tables in Data Explorer?
A. Databricks account representative
B. This transfer is not possible
C. Workspace administrator
D. New lead data engineer
E. Original data engineer
C. Workspace administrator
A data analyst has created a Delta table sales that is used by the entire data analysis team. They want help from the data engineering team to implement a series of tests to ensure the data is clean. However, the data engineering team uses Python for its tests rather than SQL.
Which of the following commands could the data engineering team use to access sales in PySpark?
A. SELECT * FROM sales
B. There is no way to share data between PySpark and SQL.
C. spark.sql(“sales”)D. spark.delta.table(“sales”)
E. spark.table(“sales”)
E. spark.table(“sales”)
Which of the following commands will return the location of database customer360?
A. DESCRIBE LOCATION customer360;
B. DROP DATABASE customer360;
C. DESCRIBE DATABASE customer360;
D. ALTER DATABASE customer360 SET DBPROPERTIES (‘location’ = ‘/user’};
E. USE DATABASE customer360;
C. DESCRIBE DATABASE customer360;
A data engineer wants to create a new table containing the names of customers that live in France.
They have written the following command:
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A senior data engineer mentions that it is organization policy to include a table property indicating that the new table includes personally identifiable information (PII).
Which of the following lines of code fills in the above blank to successfully complete the task?
A. There is no way to indicate whether a table contains PII.
B. “COMMENT PII”
C. TBLPROPERTIES PII
D. COMMENT “Contains PII”
E. PII
D. COMMENT “Contains PII”
Which of the following benefits is provided by the array functions from Spark SQL?
A. An ability to work with data in a variety of types at once
B. An ability to work with data within certain partitions and windows
C. An ability to work with time-related data in specified intervals
D. An ability to work with complex, nested data ingested from JSON files
E. An ability to work with an array of tables for procedural automation
D. An ability to work with complex, nested data ingested from JSON files
Which of the following commands can be used to write data into a Delta table while avoiding the writing of duplicate records?
A. DROP
B. IGNORE
C. MERGE
D. APPEND
E. INSERT
C. MERGE
Need to Add
