1Z0-1085-26 Core Oci Services Practice Question
An administrator needs to attach a Block Volume to a Compute instance using the paravirtualized attachment type. However, the application requires maximum possible IOPS and throughput performance. What is the recommended approach to resolve this requirement?
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
✓
Switch the volume attachment method from paravirtualized to iSCSI and select the Higher Performance volume performance tier.
To achieve maximum performance (such as up to 75,000 IOPS and 800 MB/s per volume), the administrator should use an ISCSI attachment type instead of paravirtualized, alongside a Higher Performance volume performance unit.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Keep the paravirtualized attachment and increase the volume size to the maximum limit of 32 TB.
Why it's wrong here
Volume size increases capacity, but paravirtualized attachments have performance bottlenecks compared to iSCSI.
- ✓
Switch the volume attachment method from paravirtualized to iSCSI and select the Higher Performance volume performance tier.
Why this is correct
iSCSI attachments deliver maximum IOPS and throughput, bypassing paravirtualized virtualization overhead.
- ✗
Enable Block Volume backups with incremental scheduling to reduce I/O contention.
Why it's wrong here
Backups do not impact the real-time runtime performance tier of the attached volume.
- ✗
Use a local NVMe scratch disk instead of a Block Volume for the database storage.
Why it's wrong here
Local NVMe disks are ephemeral and data is lost on reboot, making them unsuitable for persistent database storage.
Visual reference
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Oracle exam blueprint
This 1Z0-1085-26 practice question is part of Courseiva's free Oracle 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 1Z0-1085-26 exam.