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NEW QUESTION: 1
HDInsightクラスターでSparkジョブとして実行されるデータ処理ソリューションを設計しています。このソリューションは、小売業者のオンライン注文に関するほぼリアルタイムの情報を提供するために使用されます。
ソリューションには、概要情報を表示する企業イントラネット上のページを含める必要があります。
概要情報ページは、次の要件を満たしている必要があります。
*製品カテゴリ、価格帯、レビュー範囲ごとにグループ化された現在までの売上の概要を表示します。
*総売上、1日前と比較した売上、1年前と比較した売上を含む売上概要情報を表示します。
*できるだけ早く新しい注文の情報を反映します。
ソリューションの設計を推奨する必要があります。
何をお勧めしますか？回答するには、回答領域で適切な構成を選択します。

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
Sie haben eine Datenbank, die die folgenden Tabellen enthält:

Sie haben eine gespeicherte Prozedur mit dem Namen Procedure1. Prozedur1 ruft alle Auftrags-IDs nach einem bestimmten Datum ab. Die Zeilen für Prozedur1 sind nicht sortiert. Prozedur1 hat einen einzelnen Parameter namens Parameter1. Parameter1 verwendet den Typ varchar und ist so konfiguriert, dass das bestimmte Datum an Procedure1 übergeben wird. Ein Datenbankadministrator stellt fest, dass OrderDate nicht korrekt mit Parameter1 verglichen wird, nachdem der Datentyp der Spalte in datetime geändert wurde. Sie müssen die SELECT-Anweisung aktualisieren, um die folgenden Anforderungen zu erfüllen:
Der Code darf KEINE Aliase verwenden.
Der Code darf KEINE Objekttrennzeichen verwenden.
Die in Prozedur1 aufgerufenen Objekte müssen von allen Benutzern aufgelöst werden können.
OrderDate muss mit Parameter1 verglichen werden, nachdem der Datentyp von Parameter1 in datetime geändert wurde.
Welche SELECT-Anweisung sollten Sie verwenden?
Um zu antworten, geben Sie den richtigen Code in den Antwortbereich ein.
A. SELECT Orders.OrderID
VON Bestellungen
WHERE Orders.OrderDate> CONVERTER (Datum / Uhrzeit, @ Parameter1)
B. SELECT Orders.OrderID
VON Bestellungen
WHERE Orders.OrderDate> CONVERT (Datum / Uhrzeit, @ Parameter1)
Answer: B
Explanation:
Reference:
http://msdn.microsoft.com/en-us/library/cc645587.aspx

NEW QUESTION: 3
Which Intel Xeon processor supports up to 18 cores'?
A. E3-1200
B. E5-160O v3
C. E3-1200v5
D. E5-4600 v3
Answer: D