1Y0-204 Resource Provisioning and Delivery Practice Question
Which component is responsible for the 'Write Cache' in a non-persistent Citrix Provisioning (PVS) environment?
⚠ Common exam trap
Candidates mistakenly believe the master vDisk itself stores changes or that the Delivery Controller acts as the write cache repository in PVS architectures.
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
✓
The target device's allocated storage or RAM.
The write cache is a critical component that stores all changes made to the virtual machine during its session. Because the master vDisk image is read-only, all OS and application writes must be redirected to the write cache. This allows the system to remain stateless and pristine, effectively resetting the machine to the original base image state whenever the virtual machine is rebooted or powered off.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The Provisioning Server's database.
Why it's wrong here
The database stores configuration information and machine status, not the transient write cache data. If the write cache were stored in the database, it would lead to catastrophic performance degradation and database bloat. The write cache is physically stored on the local hypervisor storage or memory to maintain speed.
- ✓
The target device's allocated storage or RAM.
Why this is correct
The write cache is managed locally on the virtual machine, either in RAM or on a local high-performance disk. This ensures that I/O operations are fast and do not saturate the network bandwidth between the Provisioning Server and the target device, which is essential for a high-performance VDI experience.
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The Delivery Controller's disk.
Why it's wrong here
The Delivery Controller is responsible for brokering connections, not for hosting the write cache of the virtual machines it manages. Redirecting write cache traffic to the controller would create an unnecessary bottleneck and single point of failure, violating architectural best practices for scaling a virtual desktop environment.
- ✗
The Master vDisk file.
Why it's wrong here
The master vDisk is explicitly read-only to prevent corruption and ensure consistency across the pool. Writing cache data to the master vDisk file would permanently alter the image, defeating the primary purpose of non-persistent delivery, which relies on an immutable base image for every single machine boot process.
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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 Citrix exam blueprint
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