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NEW QUESTION: 1
Your cluster's HDFS block size in 64MB. You have directory containing 100 plain text files, each of which is 100MB in size. The InputFormat for your job is TextInputFormat. Determine how many Mappers will run?
A. 0
B. 1
C. 2
D. 3
Answer: C
Explanation:
Each file would be split into two as the block size (64 MB) is less than the file
size (100 MB), so 200 mappers would be running.
Note:
If you're not compressing the files then hadoop will process your large files (say 10G), with
a number of mappers related to the block size of the file.
Say your block size is 64M, then you will have ~160 mappers processing this 10G file (160*64 ~= 10G). Depending on how CPU intensive your mapper logic is, this might be an
acceptable blocks size, but if you find that your mappers are executing in sub minute times, then you might want to increase the work done by each mapper (by increasing the block size to 128, 256, 512m - the actual size depends on how you intend to process the data).
Reference: http://stackoverflow.com/questions/11014493/hadoop-mapreduce-appropriateinput-files-size (first answer, second paragraph)
NEW QUESTION: 2
HOTSPOT
You manage an on-premises SQL Server database.
You need to regularly move data from the database to a data store in Azure to perform data analysis.
How should you design the solution?
Use the drop-down menus to select the technology for each flowchart shape.
NOTE: Each correct selection is worth one point.
Answer:
Explanation:
Explanation:
A Azure Data Factory
Azure Data Factory is a managed service that you can use to produce trusted information from raw data in cloud or on-premises data sources. It allows developers to build data- driven workflows (pipelines) that join, aggregate and transform data sourced from their local, cloud-based and internet services, and set up complex data processing logic with little programming.
B Azure Credentials data store
You can store credentials for data stores and computes in an Azure Key Vault. Azure Data Factory retrieves the credentials when executing an activity that uses the data store/compute.
C Microsoft SQL Server
D Azure data Management Gateway
Microsoft Data Management Gateway connects on-premises data sources to cloud services for consumption.
NEW QUESTION: 3
注：この質問は、同じシナリオを使用する一連の質問の一部です。便宜上、シナリオは各質問で繰り返されます。各質問は異なる目標と回答の選択肢を提示しますが、シナリオのテキストは、このシリーズの各質問でまったく同じです。
繰り返しシナリオの開始
展示に示されているテーブルを含むデータベースがあります。 （[公開]ボタンをクリックします。）
Employeeテーブルを確認し、次のことを観察します。
*最高経営責任者（CEO）を除き、すべてのレコードのManagerIDに値があります。
* FirstNameおよびMiddleName列には、一部のレコードのnull値が含まれています。
* Title列の有効な値は、営業担当者、マネージャー、およびCEOです。
SalesSummaryテーブルを確認し、次の観察を行います。
* ProductCode列には2つの部分があります。最初の5桁は製品コードを表し、最後の7桁は単価を表します。単価は、####。##というパターンを使用します。
*多くのレコードで、ProductCode列の単価部分に値が含まれていることがわかります。
*一部のレコードでは、RegionCode列にNULLが含まれています。
*販売データは、営業担当者についてのみ記録されます。
ビジネスをサポートするための一連のレポートと手順を作成しています。各レポートまたは手順の詳細は次のとおりです。
販売概要レポート：このレポートは、年と四半期ごとにデータを集計します。レポートは次の表のようになります。
セールスマネージャーレポート：このレポートには、各セールスマネージャーと、セールスマネージャーに報告する全従業員の総売上額がリストされます。
地域別売上高レポート：このレポートには、従業員別および地域別の総売上高がリストされます。レポートには、EmployeeCode、MiddleName、LastName、RegionCode、SalesAmountの列を含める必要があります。
MiddleNameがNULLの場合、FirstNameを表示する必要があります。
FirstNameとMiddleNameの両方にnull値がある場合、不明な世界を表示する必要があります。 RegionCodeがNULLの場合、Unknownという単語を表示する必要があります。
Report1：このレポートは、SalesSummaryのデータをEmployeeテーブルおよびその他のテーブルと結合します。 Report1をサポートするオブジェクトを作成する予定です。オブジェクトには次の要件があります。
*レポートのデータを提供するSELECTステートメントと結合可能であること
*レポートのSELECTステートメントで複数回使用できます
*レポートのSELECTステートメントでのみ使用可能
*永久オブジェクトとして保存されません
Report2：このレポートは、SalesSummaryのデータをEmployeeテーブルおよびその他のテーブルと結合します。 Report1をサポートするオブジェクトを作成する予定です。オブジェクトには次の要件があります。
*レポートのデータを提供するSELECTステートメントと結合可能であること
*このレポートと他のレポートで複数回使用できます
*パラメータを受け入れる
*永久オブジェクトとして保存されます
販売階層レポート。このレポートは、単一の結果セットの行を集計し、小計行を作成し、SalesAmount列の行を超集計します。レポートでは、SaleYear、SaleQuarter、SaleMonth列が階層として使用されます。結果セットには、総計またはクロス集計の集計行を含めることはできません。
現在の価格のストアドプロシージャ：このストアドプロシージャは、製品コードが提供されたときに製品の単価を返す必要があります。単価には、最初にドル記号を含める必要があります。また、単価には、小数点の左側に3桁ごとにコンマが含まれ、小数点の左側に2桁表示される必要があります。ストアード・プロシージャーは、製品コードに無効なデータが含まれている場合でも、エラーをスローしてはなりません。
繰り返しシナリオの終わり
現在の単価を返すストアドプロシージャを作成する必要があります。
ストアドプロシージャの定義をどのように完了する必要がありますか？回答するには、回答領域で適切なTransact-SQLセグメントを選択します。
Answer:
Explanation:
NEW QUESTION: 4
What is the difference between an exception and an exclusion?
A. An exclusion does not exist
B. An exception does not exist
C. An exclusion is based on rules and exceptions are based on alerts.
D. An exception is based on rules and exclusions are on alerts
Answer: D
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