Questions and Answers: 166
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NEW QUESTION: 1
Your project management office (PMO) has suggested your project could benefit from self-assessment work at the next retrospective.
Which of the following benefits would they most likely be looking to achieve from a self-assessment?
A. Gain insights for salary performance reviews
B. Identify personal traits for human resources counseling
C. Improve personal and team practices
D. Assess compatibilities for pair programming assignments
Answer: C
NEW QUESTION: 2
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。
*これまでの売上の概要を、製品カテゴリ、価格帯、レビュー範囲別にグループ化して表示します。
*総売上、1日前の売上、1年前の売上などの売上概要情報を表示します。
*新しい注文の情報をできるだけ早く反映します。
ソリューションの設計を推奨する必要があります。
何を勧めますか?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.
NEW QUESTION: 3
사진 공유 모바일 앱을 디자인하고 있습니다. 애플리케이션은 모든 사진을 단일 Amazon S3 버킷에 저장합니다.
사용자는 모바일 장치에서 Amazon S3로 직접 사진을 업로드하고 Amazon S3에서 직접 자신의 사진을 보고 다운로드 할 수 있습니다.
잠재적으로 수백만 명의 사용자를 가장 안전한 방식으로 처리하도록 보안을 구성하려고 합니다.
새 사용자가 사진 공유 모바일 응용 프로그램에 등록 할 때 서버 측 응용 프로그램은 어떻게 해야 합니까?
A. IAM 사용자를 생성하십시오. IAM 사용자에게 적절한 권한을 할당하십시오. IAM 사용자의 액세스 키와 비밀 키를 생성하고이를 모바일 앱에 저장 한 다음이 자격 증명을 사용하여 Amazon S3에 액세스하십시오.
B. IAM 사용자를 생성하십시오. IAM 사용자에 대한 적절한 권한으로 버킷 정책을 업데이트하십시오. IAM 사용자의 액세스 키와 비밀 키를 생성하고이를 모바일 앱에 저장 한 다음이 자격 증명을 사용하여 Amazon S3에 액세스하십시오.
C. Amazon RDS에 사용자 정보를 기록하고 적절한 권한으로 IAM에서 역할을 생성합니다.
사용자가 모바일 앱을 사용하는 경우 AWS Security Token Service "AssumeRole"기능을 사용하여 임시 자격 증명을 생성하십시오. 이러한 자격 증명을 모바일 앱의 메모리에 저장하고이를 사용하여 Amazon S3에 액세스하십시오. 다음에 사용자가 모바일 앱을 실행할 때 새 자격 증명을 생성하십시오.
D. 적절한 권한이 있는 AWS Security Token Service를 사용하여 장기 자격 증명 세트를 생성하십시오.
이러한 자격 증명을 모바일 앱에 저장하고이를 사용하여 Amazon S3에 액세스하십시오.
E. Amazon DynamoDB에 사용자 정보를 기록하십시오. 사용자가 모바일 앱을 사용하는 경우 적절한 권한이 있는 AWS Security Token Service를 사용하여 임시 자격 증명을 생성하십시오. 이러한 자격 증명을 모바일 앱의 메모리에 저장하고 이를 사용하여 Amazon S3에 액세스하십시오. 다음에 사용자가 모바일 앱을 실행할 때 새 자격 증명을 생성하십시오.
Answer: C
Explanation:
Explanation
We can use either RDS or DynamoDB, however in our given answers, IAM role is mentioned only with RDS, so I would go with Answer
B. Question was explicitly focused on security, so IAM with RDS is the best choice.