mediumMultiple ChoiceObjective-mapped
XK0-006 Practice Question: Refer to the exhibit
Exhibit
Output of 'free -h':
total used free shared buff/cache available
Mem: 7.7G 7.5G 0.1G 0.0G 0.1G 0.1G
Swap: 2.0G 1.2G 0.8GRefer to the exhibit. What is the total amount of RAM installed on the system?
⚠ Common exam trap
Candidates often confuse the 'total' column with the nominal hardware capacity (e.g., 8 GB) or mistakenly pick the 'used' or 'available' values, not realizing that `free -h` reports the kernel's view of installed RAM after hardware reservations.
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
✓
7.7G
The output of `free -h` shows the total memory in the 'total' column of the 'Mem:' row, which is 7.7G. This value represents the total physical RAM installed and available to the system, as reported by the kernel from the hardware.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
7.7G
Why this is correct
The total column shows 7.7G.
- ✗
7.5G
Why it's wrong here
This is the used RAM, not total.
- ✗
8.0G
Why it's wrong here
Not present in the output.
- ✗
0.1G
Why it's wrong here
This is free RAM, not total.
Go deeper
Related to this question
Learn chapter
Process Management and System Monitoring
Key term
Kernel
The kernel is the core program of an operating system that manages hardware resources and provides essential services for all other software to run.
Key term
Value
Value is the perceived worth, benefit, or usefulness that a service, product, or activity delivers to stakeholders, especially customers and the business.
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