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Reference: https://www.databricks.com/learn/certification/data-engineer-professional
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데이터 엔지니어가 현재 운영 환경에서 사용 중인 여러 Databricks 노트북에 정의된 Python 함수에 대해 일반적인 Python 테스트 프레임워크를 사용하여 단위 테스트를 실행하려고 합니다.
데이터 엔지니어는 실제 운영 환경에서 데이터를 다루는 함수에 대해 어떻게 단위 테스트를 실행할 수 있을까요?
Correct Answer: D 🗳️
Explanation: Only visible for VCEEngine members. You can sign-up / login (it's free).
데이터 엔지니어가 Databricks 간 데이터 전송 시나리오에서 읽기 성능을 최적화하기 위해 델타 공유(Delta Sharing)를 구성하고 있습니다. 수신 측에서는 공유된 판매 데이터에 대해 시간 경과에 따른 쿼리와 스트리밍 읽기를 수행해야 합니다.
어떤 구성이 이러한 기능들을 활성화하면서 최적의 성능을 제공할까요?
Correct Answer: B 🗳️
Explanation: Only visible for VCEEngine members. You can sign-up / login (it's free).
비즈니스 인텔리전스 팀은 소매 관련 기사에 대한 다양한 요약 지표를 추적하도록 구성된 대시보드를 보유하고 있습니다.
여기에는 전날 총 매출액과 다양한 기간별 총액 및 평균이 포함됩니다. 이 대시보드를 채우는 데 필요한 필드는 다음과 같은 스키마를 따릅니다.
수요 예측을 위해 레이크하우스는 모든 품목별 판매 내역이 포함된 검증된 테이블을 보유하고 있으며, 이 테이블은 거의 실시간으로 점진적으로 업데이트됩니다. products_per_order라는 이름의 이 테이블에는 다음과 같은 필드가 포함되어 있습니다.
장기 판매 추세 보고는 변동성이 적기 때문에 새로운 대시보드를 사용하는 분석가는 하루에 한 번만 데이터를 새로 고치면 됩니다. 또한, 일반적인 업무 시간 동안 많은 사용자가 대시보드를 대화형으로 조회하므로 결과가 빠르게 표시되고 각 데이터 생성에 필요한 총 컴퓨팅 리소스가 줄어듭니다.
어떤 솔루션이 최종 사용자의 기대를 충족시키면서 동시에 발생 가능한 비용을 통제하고 제한할 수 있을까요?
Correct Answer: B 🗳️
컴퓨팅 리소스를 가장 많이 사용하는 사용자를 파악하기 위해 데이터 엔지니어링 팀은 Databricks 워크스페이스 내 사용량을 모니터링하여 리소스 활용도와 비용을 효율적으로 관리해야 합니다. 이를 위해 팀은 Unity Catalog의 시스템 카탈로그에서 제공되는 Databricks 시스템 테이블을 활용하여 워크스페이스 활동에 대한 자세한 정보를 얻기로 했습니다. 이 경우 시스템 카탈로그에서 어떤 SQL 쿼리를 실행해야 할까요?
Correct Answer: C 🗳️
Explanation: Only visible for VCEEngine members. You can sign-up / login (it's free).
데이터 엔지니어링 팀은 Databricks Lakehouse Monitoring을 사용하여 Delta 테이블의 중요한 열에 대한 percent_null 메트릭을 추적합니다. 프로필 메트릭 테이블(prod_catalog.prod_schema.
`customer_data_profile_metrics` 테이블에는 시간별 `percent_null` 값이 저장됩니다. 팀은 `percent_null`의 일일 평균값이 3일 연속 5%를 초과할 경우 알림을 발생시키되, 지속적인 문제 발생 시 알림이 과도하게 발생하지 않도록 하려고 합니다. 오탐과 중복 알림을 최소화하면서 이러한 목표를 달성하는 SQL 알림 구성은 무엇일까요?
Correct Answer: D 🗳️
Explanation: Only visible for VCEEngine members. You can sign-up / login (it's free).
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