LFCS · Question #155
In the following output, what resource is the program being observed using the most?
The correct answer is C. disk I/O. If the output implies performance monitoring metrics related to storage, then disk I/O is the resource that the program is most heavily using.
Question
Options
- ACPU
- Bmemory
- Cdisk I/O
- Dnetwork I/O
How the community answered
(46 responses)- A7% (3)
- B13% (6)
- C76% (35)
- D4% (2)
Why each option
If the output implies performance monitoring metrics related to storage, then disk I/O is the resource that the program is most heavily using.
CPU usage is typically observed with tools like `top` or `htop`, displaying processor utilization and load averages.
Memory usage is typically monitored with tools like `free` or `vmstat`, showing RAM consumption and swap activity.
Performance monitoring tools like `iostat` specifically measure disk I/O metrics, such as read/write speeds, I/O wait times, and device utilization percentage. If such an output indicates high activity in these metrics, disk I/O is the primary resource in use.
Network I/O is usually monitored with tools like `netstat` or `iftop`, which show bandwidth, packet rates, and connection statistics.
Concept tested: Interpreting disk I/O monitoring output
Source: https://man7.org/linux/man-pages/man1/iostat.1.html
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