11.
Which of the following top parameters shows the time the CPU spends
handling processes in user space?
- A.sy
- B.us
- C.hi
- D.wa
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
| The us number indicates the percentage of time the CPUs spend handling processes in user space. |
12.
By default, top shows one line that summarizes CPU performance data for
all CPUs in the system. How can you tell top to show one line for each CPU
(core) in your system instead of the summary line?
- A.Start top with the option --all .
- B.From the top interface, press A.
- C.Open the top field selection interface and select All CPUs.
- D.From the top interface, press 1.
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| To show one line for each CPU (core) in top, press 1 from the top interface. |
13.
Which of the following statements is true about (page) cache memory?
- A.Your server can do perfectly without it.
- B.Cache memory ensures that registers that are often accessed on the CPU are stored close to the CPU cores.
- C.Memory pages in cache will be freed automatically if a memory shortage occurs.
- D.Cache is used to store recently used file system metadata.
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| Cache is used for memory optimization. If the memory currently used for cache is needed for other purposes, the cache memory is automatically liberated. |
14.
Which key is used to show columns that can be shown in top?
- A.f
- B.c
- C.w
- D.j
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
| From a running top, press f to show fields that can be selected for display. |
15.
You have modified top settings quite a bit and you want to make sure that the
current display configuration is automatically opened after restarting top. How
do you do that?
- A.Modify the contents of ~/.toprc.
- B.Use w to write the settings to ~/.toprc.
- C.Use W to write the settings to ~/.toprc.
- D.Type D to write the top settings as the defaults.
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| The W key is used to write current top settings to the top configuration file. |
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