AZ-802 Manage Storage and File Services Practice Question
You are deploying a new file server that will host Hyper-V virtual machine files. You want to take advantage of block cloning to improve the performance of checkpoint merging and VM cloning operations. Which file system should you use?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
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ReFS
The Resilient File System (ReFS) includes a feature called block cloning, which allows the file system to copy ranges of file blocks on behalf of an application as a low-cost metadata operation. This significantly accelerates Hyper-V operations like merging checkpoints, as data blocks are remapped rather than physically copied.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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NTFS
Why it's wrong here
While NTFS is a robust and reliable file system, it does not support the block cloning technology. Operations like merging checkpoints in Hyper-V on an NTFS volume require intensive physical data copying and I/O, which is significantly slower than the metadata-only operations supported by the ReFS file system.
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FAT32
Why it's wrong here
FAT32 is a legacy file system with significant limitations, including a 4GB maximum file size and a lack of modern security and resiliency features. It is entirely unsuitable for hosting virtual machine disks and does not support any advanced features like block cloning or data integrity streams.
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ReFS
Why this is correct
ReFS is Microsoft's modern file system designed for high performance and data integrity. Its block cloning feature allows Hyper-V to perform 'copy-on-write' operations at the metadata level, making VM cloning and checkpoint merging nearly instantaneous while reducing the overall I/O load on the underlying storage hardware.
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exFAT
Why it's wrong here
exFAT is primarily designed for flash drives and external storage devices where NTFS overhead is not desired. It lacks the advanced transactional features and block-level optimization required for enterprise server workloads like Hyper-V, and it does not support the block cloning features found in the ReFS file system.
About these practice questions
This AZ-802 question is part of Courseiva's 116-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Microsoft exam blueprint
This AZ-802 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 AZ-802 exam.