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NEW QUESTION: 1
You are designing a data processing solution that will run as a Spark job on an HDInsight cluster. The solution will be used to provide near real-time information about online ordering for a retailer.
The solution must include a page on the company intranet that displays summary information.
The summary information page must meet the following requirements:
* Display a summary of sales to date grouped by product categories, price range, and review scope.
* Display sales summary information including total sales, sales as compared to one day ago and sales as compared to one year ago.
* Reflect information for new orders as quickly as possible.
You need to recommend a design for the solution.
What should you recommend? To answer, select the appropriate configuration in the answer area.

Answer:
Explanation:

Explanation:
Box 1: DataFrame
DataFrames
Best choice in most situations.
Provides query optimization through Catalyst.
Whole-stage code generation.
Direct memory access.
Low garbage collection (GC) overhead.
Not as developer-friendly as DataSets, as there are no compile-time checks or domain object programming.
Box 2: parquet
The best format for performance is parquet with snappy compression, which is the default in Spark 2.x. Parquet stores data in columnar format, and is highly optimized in Spark.
Incorrect Answers:
DataSets
Good in complex ETL pipelines where the performance impact is acceptable.
Not good in aggregations where the performance impact can be considerable.
RDDs
You do not need to use RDDs, unless you need to build a new custom RDD.
No query optimization through Catalyst.
No whole-stage code generation.
High GC overhead.
References:
https://docs.microsoft.com/en-us/azure/hdinsight/spark/apache-spark-perf

NEW QUESTION: 2
Given:

What is the result?

A. Option C
B. Option D
C. Option A
D. Option B
Answer: B

NEW QUESTION: 3
Your network environment is configured according to the following table:

The data tier is configured to use SQL Server Reporting Services (SSRS) and SQL Server Analysis Services (SSAS). The data tier currently does not contain a database named TFS_Analysis.
You need to rebuild the data warehouse, including the SSRS and SSAS databases.
What should you do?
A. Log on to the application-tier server, then rebuild and redeploy the data warehouse cube by using SQL Server Business Intelligence Studio.
B. Log on to the application-tier server. From the Reporting node in the TFS Administration Console, select the Start Rebuild option.
C. Log on to the database-tier server, then rebuild and redeploy the data warehouse cube by using SQL Server Business Intelligence Studio.
D. Log on to the application-tier server and run the TFSConfig.exe Rebuild Warehouse /analysisServices / ReportingDataSourcePassword: <password> command.
E. Log on to the database-tier server and rebuild the data warehouse using SQL Server Management Studio.
Answer: B

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