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Databricks Databricks-Certified-Data-Engineer-Professional日本語 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Data Modeling and Storage20%- Storage Optimization
- File Formats
- Data Modeling
Topic 2: Databricks Lakehouse Platform24%- Data Management
- Unity Catalog
- Delta Lake
- Lakehouse Architecture
Topic 3: Data Processing28%- Spark SQL
- Data Transformation
- ETL Pipelines
- Structured Streaming
Topic 4: Monitoring and Troubleshooting16%- Monitoring
- Performance Optimization
- Troubleshooting
Topic 5: Data Quality and Governance12%- Governance
- Data Lineage
- Data Quality

Databricks Certified Data Engineer Professional Exam (Databricks-Certified-Data-Engineer-Professional日本語版) Sample Questions:

1. データエンジニアは、Auto Loaderを使用して、到着したJSONデータを読み取ります。Auto Loaderは無効なJSONレコードを隔離するように設定していましたが、時間が経つにつれて、整形式のJSONであるにもかかわらず、一部のレコードが隔離されていることに気づきました。
コードスニペットは次のとおりです。
df = (spark.readStream
.format("cloudFiles")
.option("cloudFiles.format", "json")
.option("badRecordsPath", "/tmp/somewhere/badRecordsPath")
.schema("a int, b int")
.load("/Volumes/catalog/schema/raw_data/"))
データが欠落している原因は何ですか?

A) エンジニアはオプション「cloudFiles.quarantineMode」を「rescue」に設定するのを忘れました。
B) ソース データは有効な JSON ですが、何らかの点で定義されたスキーマに準拠していません。
C) ある時点で、上流のデータ プロバイダーはすべてを複数行の JSON に切り替えました。
D) badRecordsPath の場所に多くの小さなファイルが蓄積されています。


2. スピルは、様々な広範な変換の実行の結果として発生します。しかし、スピルを診断するには、重要な指標を積極的に探す必要があります。
パーティションがディスクに書き込まれていることを示す主なインジケーターのうち 2 つは、Spark UI のどこにありますか?

A) クエリの詳細画面とジョブの詳細画面
B) ステージの詳細画面とクエリの詳細画面
C) ステージの詳細画面とエグゼキュータのログファイル
D) ドライバーとエグゼキューターのログファイル
E) Executor の詳細画面と Executor のログファイル


3. 統合テストについて説明している記述はどれですか?

A) アプリケーションのユースケースを検証する
B) アプリケーションの個々の要素の動作を検証します
C) アプリケーションのサブシステム間の相互作用を検証します
D) 自動テストフレームワークが必要です
E) 手動介入が必要


4. 必要なモジュールを見つけようとするときに検索するディレクトリのリストが含まれている Python 変数はどれですか?

A) pypi.path
B) os-path
C) importlib.resource path
D) sys.path
E) pylib.source


5. ユーザーは、DLT 期待値を使用して、派生テーブル レポートに、テーブル validation_copy に含まれるソースからのすべてのレコードが含まれていることを検証したいと考えています。
ユーザーは、レポート テーブル定義に期待値を追加することでこれを達成しようとしますが、失敗します。

どのアプローチを使用すれば、DLT 期待値を使用して、このテーブルに存在するすべての期待レコードを検証できますか?

A) validation_copyとレポートに対して左外部結合を実行するビューを定義し、レポートテーブルのDLT期待値でこのビューを参照します。
B) validation_copyとreportとreportの左外部結合を実行し、その結果をreportテーブルのDLT期待値と比較する関数を定義します。
C) 2 つのテーブルで左外部結合を実行する SQL UDF を定義し、レポート テーブルの DLT 期待値のレポート キー値に null 値が返されるかどうかを確認します。
D) 検証コピーとレポートに対して左外部結合を実行する一時テーブルを定義し、レポートキー値がnullにならないという期待値を定義します。


Solutions:

Question # 1
Answer: B
Question # 2
Answer: C
Question # 3
Answer: C
Question # 4
Answer: D
Question # 5
Answer: A

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