Databricks-Certified-Data-Engineer-Associate PDF問題集で2023年05月29日最近更新された問題 [Q28-Q44]

Databricks-Certified-Data-Engineer-Associate PDF問題集で2023年05月29日最近更新された問題

Databricks-Certified-Data-Engineer-Associate試験問題有効なDatabricks-Certified-Data-Engineer-Associate問題集PDF

質問 # 28
A data engineer wants to schedule their Databricks SQL dashboard to refresh once per day, but they only want the associated SQL endpoint to be running when it is necessary.
Which of the following approaches can the data engineer use to minimize the total running time of the SQL endpoint used in the refresh schedule of their dashboard?

A. They can ensure the dashboard's SQL endpoint is not one of the included query's SQL endpoint.
B. They can reduce the cluster size of the SQL endpoint.
C. They can set up the dashboard's SQL endpoint to be serverless.
D. They can ensure the dashboard's SQL endpoint matches each of the queries' SQL endpoints.
E. They can turn on the Auto Stop feature for the SQL endpoint.

正解：E

質問 # 29
A data engineer is attempting to drop a Spark SQL table my_table. The data engineer wants to delete all table metadata and data.
They run the following command:
DROP TABLE IF EXISTS my_table
While the object no longer appears when they run SHOW TABLES, the data files still exist.
Which of the following describes why the data files still exist and the metadata files were deleted?

A. The table's data was smaller than 10 GB
B. The table did not have a location
C. The table was managed
D. The table's data was larger than 10 GB
E. The table was external

正解：E

質問 # 30
A new data engineering team has been assigned to work on a project. The team will need access to database customers in order to see what tables already exist. The team has its own group team.
Which of the following commands can be used to grant the necessary permission on the entire database to the new team?

A. GRANT CREATE ON DATABASE customers TO team;
B. GRANT USAGE ON CATALOG team TO customers;
C. GRANT CREATE ON DATABASE team TO customers;
D. GRANT USAGE ON DATABASE customers TO team;
E. GRANT VIEW ON CATALOG customers TO team;

正解：D

質問 # 31
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 OPTIMIZE command was nun on the table
B. The HISTORY command was run on the table
C. The VACUUM command was run on the table
D. The TIME TRAVEL command was run on the table
E. The DELETE HISTORY command was run on the table

正解：E

質問 # 32
A data engineer only wants to execute the final block of a Python program if the Python variable day_of_week is equal to 1 and the Python variable review_period is True.
Which of the following control flow statements should the data engineer use to begin this conditionally executed code block?

A. if day_of_week = 1 and review_period = "True":
B. if day_of_week = 1 & review_period: = "True":
C. if day_of_week == 1 and review_period == "True":
D. if day_of_week == 1 and review_period:
E. if day_of_week = 1 and review_period:

正解：C

質問 # 33
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. Original data engineer
B. Databricks account representative
C. This transfer is not possible
D. Workspace administrator
E. New lead data engineer

正解：E

質問 # 34
Which of the following describes the storage organization of a Delta table?

A. Delta tables are stored in a collection of files that contain data, history, metadata, and other attributes.
B. Delta tables are stored in a single file that contains data, history, metadata, and other attributes.
C. Delta tables store their data in a single file and all metadata in a collection of files in a separate location.
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.

正解：A

質問 # 35
A new data engineering team team. has been assigned to an ELT project. The new data engineering team will need full privileges on the database customers to fully manage the project.
Which of the following commands can be used to grant full permissions on the database to the new data engineering team?

A. GRANT SELECT CREATE MODIFY USAGE PRIVILEGES ON DATABASE customers TO team;
B. GRANT ALL PRIVILEGES ON DATABASE team TO customers;
C. GRANT SELECT PRIVILEGES ON DATABASE customers TO teams;
D. GRANT USAGE ON DATABASE customers TO team;
E. GRANT ALL PRIVILEGES ON DATABASE customers TO team;

正解：E

質問 # 36
A data engineer needs to apply custom logic to string column city in table stores for a specific use case. In order to apply this custom logic at scale, the data engineer wants to create a SQL user-defined function (UDF).
Which of the following code blocks creates this SQL UDF?

正解：B

質問 # 37
A data engineer has been using a Databricks SQL dashboard to monitor the cleanliness of the input data to an ELT job. The ELT job has its Databricks SQL query that returns the number of input records containing unexpected NULL values. The data engineer wants their entire team to be notified via a messaging webhook whenever this value reaches 100.
Which of the following approaches can the data engineer use to notify their entire team via a messaging webhook whenever the number of NULL values reaches 100?

A. They can set up an Alert with a new email alert destination.
B. They can set up an Alert without notifications.
C. They can set up an Alert with a new webhook alert destination.
D. They can set up an Alert with one-time notifications.
E. They can set up an Alert with a custom template.

正解：C

質問 # 38
Which of the following commands will return the location of database customer360?

A. ALTER DATABASE customer360 SET DBPROPERTIES ('location' = '/user'};
B. DESCRIBE LOCATION customer360;
C. DESCRIBE DATABASE customer360;
D. DROP DATABASE customer360;
E. USE DATABASE customer360;

正解：C

質問 # 39
Which of the following describes when to use the CREATE STREAMING LIVE TABLE (formerly CREATE INCREMENTAL LIVE TABLE) syntax over the CREATE LIVE TABLE syntax when creating Delta Live Tables (DLT) tables using SQL?

A. CREATE STREAMING LIVE TABLE should be used when the subsequent step in the DLT pipeline is static.
B. CREATE STREAMING LIVE TABLE should be used when the previous step in the DLT pipeline is static.
C. CREATE STREAMING LIVE TABLE should be used when data needs to be processed incrementally.
D. CREATE STREAMING LIVE TABLE is redundant for DLT and it does not need to be used.
E. CREATE STREAMING LIVE TABLE should be used when data needs to be processed through complicated aggregations.

正解：C

質問 # 40
Which of the following describes the relationship between Gold tables and Silver tables?

A. Gold tables are more likely to contain more data than Silver tables.
B. Gold tables are more likely to contain truthful data than Silver tables.
C. Gold tables are more likely to contain aggregations than Silver tables.
D. Gold tables are more likely to contain valuable data than Silver tables.
E. Gold tables are more likely to contain a less refined view of data than Silver tables.

正解：E

質問 # 41
Which of the following data lakehouse features results in improved data quality over a traditional data lake?

A. A data lakehouse stores data in open formats.
B. A data lakehouse provides storage solutions for structured and unstructured data.
C. A data lakehouse allows the use of SQL queries to examine data.
D. A data lakehouse supports ACID-compliant transactions.
E. A data lakehouse enables machine learning and artificial Intelligence workloads.

正解：C

質問 # 42
Which of the following benefits is provided by the array functions from Spark SQL?

A. An ability to work with complex, nested data ingested from JSON files
B. An ability to work with time-related data in specified intervals
C. An ability to work with data within certain partitions and windows
D. An ability to work with an array of tables for procedural automation
E. An ability to work with data in a variety of types at once

正解：C

質問 # 43
A data engineer needs to create a table in Databricks using data from their organization's existing SQLite database.
They run the following command:

Which of the following lines of code fills in the above blank to successfully complete the task?