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Download Databricks Certified Professional Data Engineer Exam Exam Dumps

NEW QUESTION 46
Which of the following describes a benefit of a data lakehouse that is unavailable in a traditional data
warehouse?

A. A data lakehouse enables both batch and streaming analyticsB. A data lakehouse captures snapshots of data for version control purposesC. A data lakehouse utilizes proprietary storage formats for dataD. A data lakehouse couples storage and compute for complete controlE. A data lakehouse provides a relational system of data management

Answer: A

 

NEW QUESTION 47
A data engineer needs to create a database called customer360 at the loca-tion /customer/customer360. The
data engineer is unsure if one of their colleagues has already created the database.
Which of the following commands should the data engineer run to complete this task?

A. CREATE DATABASE customer360 LOCATION '/customer/customer360';B. CREATE DATABASE customer360 DELTA LOCATION '/customer/customer360';C. CREATE DATABASE IF NOT EXISTS customer360;D. CREATE DATABASE IF NOT EXISTS customer360 LOCATION '/customer/customer360';E. CREATE DATABASE IF NOT EXISTS customer360 DELTA LOCATION '/customer/customer360';

Answer: D

 

NEW QUESTION 48
Which of the following commands will return records from an existing Delta table my_table where duplicates
have been removed?

A. 1. SELECT DISTINCT *
2. FROM my_table;B. 1. SELECT *
2. FROM my_table
3. WHERE duplicate = False;C. 1. MERGE INTO my_table a
2. USING new_records b;D. 1. MERGE INTO my_table a
2. USING new_records b ON a.id = b.id
3. WHEN NOT MATCHED
4. THEN INSERT *;E. 1. DROP DUPLICATES
2. FROM my_table;

Answer: A

 

NEW QUESTION 49
A table customerLocations exists with the following schema:
1. id STRING,
2. date STRING,
3. city STRING,
4. country STRING
A senior data engineer wants to create a new table from this table using the following command:
1. CREATE TABLE customersPerCountry AS
2. SELECT country,
3. COUNT(*) AS customers
4. FROM customerLocations
5. GROUP BY country;
A junior data engineer asks why the schema is not being declared for the new table. Which of the following
responses explains why declaring the schema is not necessary?

A. CREATE TABLE AS SELECT statements assign all columns the type STRINGB. CREATE TABLE AS SELECT statements result in tables that do not support schemasC. CREATE TABLE AS SELECT statements adopt schema details from the source table and queryD. CREATE TABLE AS SELECT statements result in tables where schemas are optionalE. CREATE TABLE AS SELECT statements infer the schema by scanning the data

Answer: C

 

NEW QUESTION 50
......


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