AZ C21R/L44 (K44) Irrigation Systems (Residential/Commercial) Exam

AZ C21R/L44 (K44) Irrigation Systems
(Residential/Commercial) Exam
Question 1. Which command provides a summary of CPU, memory, and

swap usage statistics in real-time?


A) top


B) netstat


C) df


D) iptraf


Answer: A


Explanation: The top command provides a dynamic, real-time summary

of CPU, memory, and swap usage, as well as running processes.




Question 2. What tool would you use to monitor real-time network

traffic statistics in a text-based interface?


A) ps

,AZ C21R/L44 (K44) Irrigation Systems
(Residential/Commercial) Exam
B) iptraf


C) vmstat


D) lsof


Answer: B


Explanation: iptraf is a console-based network monitoring tool that

provides real-time statistics about network traffic.




Question 3. Which of the following commands can be used to see disk

I/O statistics?


A) iostat


B) netstat


C) free


D) ps

,AZ C21R/L44 (K44) Irrigation Systems
(Residential/Commercial) Exam
Answer: A


Explanation: iostat is used to monitor system input/output device

loading by observing the time the devices are active in relation to their

average transfer rates.




Question 4. What does the command vmstat display?


A) Disk usage


B) System virtual memory statistics


C) Network connections


D) Process status


Answer: B


Explanation: vmstat reports information about processes, memory,

paging, block IO, traps, and CPU activity.

, AZ C21R/L44 (K44) Irrigation Systems
(Residential/Commercial) Exam

Question 5. Which command shows a list of all current network

connections and listening ports?


A) netstat


B) free


C) df


D) top


Answer: A


Explanation: netstat displays network connections, routing tables,

interface statistics, masquerade connections, and multicast

memberships.