Quick Answer
The answer is AzCopy, the correct choice for securely transferring 500 GB of CSV files daily to Azure Data Lake Storage Gen2 over the internet. AzCopy is a command-line utility engineered for high-performance data transfer, supporting HTTPS encryption to ensure security during transit, and it can handle large volumes like 500 GB efficiently through parallelized operations and resumable transfers. On the Microsoft Azure Data Fundamentals DP-900 exam, this scenario tests your understanding of native Azure tools for bulk data movement, often contrasting AzCopy with services like Azure Data Factory or Azure Storage Explorer—a common trap is choosing Data Factory for its orchestration features, but AzCopy is lighter and purpose-built for direct, scriptable transfers without added overhead. Remember the memory tip: “AzCopy for copy, no orchestration needed”—if the task is simply moving files with security and speed, AzCopy is your go-to.
This DP-900 practice question tests your understanding of describe core data concepts. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A data engineer needs to load 500 GB of CSV files from an on-premises server into Azure Data Lake Storage Gen2 daily. The data must be transferred securely over the internet. Which Azure tool should they use?
Azure Data Factory
Why wrong: Azure Data Factory is an ETL orchestrator, not the simplest tool for direct file copy.
Azure PowerShell
Why wrong: Azure PowerShell can copy files but is less efficient than AzCopy for large volumes.
Azure Import/Export service
Why wrong: Azure Import/Export is for offline physical data transfer.
AzCopy
AzCopy is optimized for copying data to Azure Storage over the network with high performance.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
AzCopy
AzCopy is the correct tool because it is a command-line utility designed for high-performance, secure copying of data to and from Azure Blob Storage and Azure Data Lake Storage Gen2. It supports the required 500 GB daily transfer over the internet using HTTPS encryption, and can be scripted for automation without the overhead of a full orchestration service.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Azure Data Factory
Why it's wrong here
Azure Data Factory is an ETL orchestrator, not the simplest tool for direct file copy.
Azure PowerShell
Why it's wrong here
Azure PowerShell can copy files but is less efficient than AzCopy for large volumes.
Azure Import/Export service
Why it's wrong here
Azure Import/Export is for offline physical data transfer.
AzCopy
Why this is correct
AzCopy is optimized for copying data to Azure Storage over the network with high performance.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often confuse Azure Data Factory as the default tool for any data movement, overlooking that AzCopy is the lightweight, purpose-built utility for direct, scriptable bulk transfers without orchestration overhead.
Detailed technical explanation
AzCopy uses parallel TCP connections and automatic retries to maximize throughput over the internet, and it supports server-side copy operations for Data Lake Storage Gen2, which can reduce network load when copying within Azure. It also integrates with Azure Active Directory for authentication, allowing fine-grained access control via RBAC, and can resume interrupted transfers using a journal file, which is critical for daily 500 GB loads over potentially unreliable internet connections.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
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FAQ
Describe core data concepts — This question tests Describe core data concepts — Read the scenario before looking for a memorised answer..
The correct answer is: AzCopy — AzCopy is the correct tool because it is a command-line utility designed for high-performance, secure copying of data to and from Azure Blob Storage and Azure Data Lake Storage Gen2. It supports the required 500 GB daily transfer over the internet using HTTPS encryption, and can be scripted for automation without the overhead of a full orchestration service.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
This DP-900 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DP-900 exam.
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