1z0-106 Exam Dumps : Oracle Linux 8 Advanced System Administration

Explanation of Answer B:iostatis a tool used to monitor system input/output device loading by observing the time devices are active concerning their average transfer rates. The "Device Utilization Report" provides statistics about device utilization and throughput rates, which is critical in identifying performance bottlenecks.

Explanation of Answer E:iostatalso generates "CPU Utilization Reports." These reports provide data about how the CPU is utilized during input/output operations, showing the percentage of CPU time used for user processes, system processes, and the time the CPU remains idle.

Explanation of Answer A:

Network services running in a confined domain: SELinux provides domain confinement for services, ensuring they run with restricted access based on their defined policies.

The oracle user must be confined: The commandsemanage login -a -s guest_u oracleconfines theoracleuser to theguest_uSELinux user role, which is a confined role.

Access to files and directories based only on SELinux contexts: With SELinux enabled and the policy loaded, access is governed by SELinux contexts.

Persistent SELinux configuration across reboots: Thesetenforce enforcingcommand, combined with the appropriate policy configuration, ensures that SELinux remains in enforcing mode across reboots.

Users able to publish private HTML content: Thesetsebool -P http_enable_homedirs oncommand enables the use of user home directories for web content, allowing users to host personal web pages.

Option B (Correct):Btrfs uses a copy-on-write mechanism for both data and metadata, which ensures that the file system is more resilient to crashes and data corruption.

Option E (Correct):Btrfs supports online resizing, meaning that you can change the size of a mounted Btrfs file system without unmounting it.

Option G (Correct):Btrfs automatically defragments files in the background to maintain performance.

Option A (Incorrect):While Btrfs does support mirroring, it is not strictly block device mirroring in the traditional sense like RAID; it uses a different approach to redundancy.

Option C (Incorrect):Btrfs is not a cluster file system; it is designed for local file systems.

Option D (Incorrect):While Btrfs can store small files efficiently, it is not its primary design goal compared to other file systems optimized specifically for small files.

Option F (Incorrect):Btrfs is a file system with integrated volume management capabilities but is not a general-purpose volume manager like LVM.

Oracle Linux Reference:Refer to:

Oracle® Linux 8: Btrfs File System

man btrfsfor features and management.