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Databricks-Certified-Associate-Developer-for-Apache-Spark-3.0 Dumps With Exact Questions and Answers

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Databricks-Certified-Associate-Developer-for-Apache-Spark-3.0 Questions and Answers

Question # 1

Which of the following code blocks sorts DataFrame transactionsDf both by column storeId in ascending and by column productId in descending order, in this priority?

A.

transactionsDf.sort("storeId", asc("productId"))

B.

transactionsDf.sort(col(storeId)).desc(col(productId))

C.

transactionsDf.order_by(col(storeId), desc(col(productId)))

D.

transactionsDf.sort("storeId", desc("productId"))

E.

transactionsDf.sort("storeId").sort(desc("productId"))

Question # 2

The code block displayed below contains an error. The code block should merge the rows of DataFrames transactionsDfMonday and transactionsDfTuesday into a new DataFrame, matching

column names and inserting null values where column names do not appear in both DataFrames. Find the error.

Sample of DataFrame transactionsDfMonday:

1.+-------------+---------+-----+-------+---------+----+

2.|transactionId|predError|value|storeId|productId| f|

3.+-------------+---------+-----+-------+---------+----+

4.| 5| null| null| null| 2|null|

5.| 6| 3| 2| 25| 2|null|

6.+-------------+---------+-----+-------+---------+----+

Sample of DataFrame transactionsDfTuesday:

1.+-------+-------------+---------+-----+

2.|storeId|transactionId|productId|value|

3.+-------+-------------+---------+-----+

4.| 25| 1| 1| 4|

5.| 2| 2| 2| 7|

6.| 3| 4| 2| null|

7.| null| 5| 2| null|

8.+-------+-------------+---------+-----+

Code block:

sc.union([transactionsDfMonday, transactionsDfTuesday])

A.

The DataFrames' RDDs need to be passed into the sc.union method instead of the DataFrame variable names.

B.

Instead of union, the concat method should be used, making sure to not use its default arguments.

C.

Instead of the Spark context, transactionDfMonday should be called with the join method instead of the union method, making sure to use its default arguments.

D.

Instead of the Spark context, transactionDfMonday should be called with the union method.

E.

Instead of the Spark context, transactionDfMonday should be called with the unionByName method instead of the union method, making sure to not use its default arguments.

Question # 3

Which of the following options describes the responsibility of the executors in Spark?

A.

The executors accept jobs from the driver, analyze those jobs, and return results to the driver.

B.

The executors accept tasks from the driver, execute those tasks, and return results to the cluster manager.

C.

The executors accept tasks from the driver, execute those tasks, and return results to the driver.

D.

The executors accept tasks from the cluster manager, execute those tasks, and return results to the driver.

E.

The executors accept jobs from the driver, plan those jobs, and return results to the cluster manager.

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