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Home/Questions/Cloud/Tools/Explain GetMetadata, ForEach, and Copy Data in Azure Data Factory.

Explain GetMetadata, ForEach, and Copy Data in Azure Data Factory.

Cloud/Toolseasy0.2 min readPremium

Architectural logic: GetMetadata lists files/folders; ForEach iterates; Copy Data moves data. Flow: GetMetadata path → childItems → ForEach items → Copy Data per item. Why: Dynamic file iteration; per-file control. Scalability: ForEach batchCount for parallelism; Copy...

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Frequency
Low
Asked at 1 company
Category
179
questions in Cloud/Tools
Difficulty Split
104E|27M|48H
in this category
Total Bank
1,863
across 7 categories
Asked at these companies
Deolite

Why This Question Matters

This easy-level Cloud/Tools question appears frequently in data engineering interviews at companies like Deolite. While less common, it tests deeper understanding that distinguishes strong candidates.

How to Approach This

Start by clearly defining the core concept being asked about. Interviewers want to see that you understand the fundamentals before diving into implementation details. Structure your answer with a definition, then explain the practical application with a concise example.

Expert Answer
48 words

Architectural logic: GetMetadata lists files/folders; ForEach iterates; Copy Data moves data. Flow: GetMetadata path → childItems → ForEach items → Copy Data per item. Why: Dynamic file iteration; per-file control. Scalability: ForEach batchCount for parallelism; Copy parallelCopies. Best practice: GetMetadata + ForEach for dynamic; handle empty; use @item().Name.

The complete answer continues with detailed implementation patterns, architectural trade-offs, and production-grade considerations covering performance optimization and real-world examples.

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According to DataEngPrep.tech, this is one of the most frequently asked Cloud/Tools interview questions, reported at 1 company. DataEngPrep.tech maintains a curated database of 1,863+ real data engineering interview questions across 7 categories, verified by industry professionals.

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