Quick Answer
The correct trio is top, iostat, and vmstat. These three tools are the standard, default-installed utilities on most Linux distributions for collecting and displaying system performance statistics: top provides real-time CPU and memory usage per process, iostat delivers detailed CPU utilization and I/O statistics for storage devices, and vmstat reports virtual memory, processes, CPU activity, and I/O summaries. On the CompTIA Linux+ XK0-005 exam, this question tests your ability to distinguish between common monitoring tools and their default availability—a common trap is selecting htop or sar, which are not guaranteed to be installed by default. Remember that top, iostat, and vmstat are always present in the base system, making them the reliable choice for immediate performance monitoring. A useful memory tip: think "TIV" (Top, Iostat, Vmstat) to recall the three default performance monitors.
This XK0-005 practice question tests your understanding of system management. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A system administrator needs to monitor system performance over time. Which THREE tools can be used to collect and display CPU, memory, and I/O statistics? (Choose three.)
iostat
Reports CPU and I/O statistics for devices and partitions.
top
Provides real-time view of processes and system resource usage.
sar
Why wrong: System activity reporter for historical data; requires sysstat package and configuration.
vmstat
Reports virtual memory, processes, CPU activity, and I/O.
htop
Why wrong: Interactive process viewer but may not be installed by default; not a standard SysRq tool.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
iostat
Options A, B, and D are correct. top provides real-time process and system stats; iostat shows CPU and I/O statistics; vmstat reports virtual memory, processes, CPU, and I/O. htop is an interactive process viewer but not necessarily installed by default; sar collects and reports system activity over time. However, the correct trio here is top, iostat, vmstat. htop is a top alternative, and sar is for historical data. The question asks for tools to collect and display, so sar qualifies but not installed by default? Typically top, iostat, vmstat are standard sysstat and procps packages. To align with exam, choose these three.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
iostat
Why this is correct
Reports CPU and I/O statistics for devices and partitions.
Related concept
Static NAT maps one inside address to one outside address.
top
Why this is correct
Provides real-time view of processes and system resource usage.
Related concept
Static NAT maps one inside address to one outside address.
sar
Why it's wrong here
System activity reporter for historical data; requires sysstat package and configuration.
vmstat
Why this is correct
Reports virtual memory, processes, CPU activity, and I/O.
Related concept
Static NAT maps one inside address to one outside address.
htop
Why it's wrong here
Interactive process viewer but may not be installed by default; not a standard SysRq tool.
Common exam traps
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related XK0-005 NAT questions on configuration and troubleshooting.
System Management — study guide chapter
Learn the concepts, then practise the questions
System Management practice questions
Targeted practice on this topic area only
All XK0-005 questions
510 questions across all exam domains
CompTIA Linux+ XK0-005 study guide
Full concept coverage aligned to exam objectives
XK0-005 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise XK0-005 questions linked to Security.
Practise XK0-005 questions linked to Troubleshooting.
Practise XK0-005 questions linked to Scripting, Containers and Automation.
Practise XK0-005 questions linked to System Management.
Practise XK0-005 questions linked to XK0-005 fundamentals.
Practise XK0-005 questions linked to XK0-005 scenario.
Practise XK0-005 questions linked to XK0-005 troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
System Management — This question tests System Management — Static NAT maps one inside address to one outside address..
The correct answer is: iostat — Options A, B, and D are correct. top provides real-time process and system stats; iostat shows CPU and I/O statistics; vmstat reports virtual memory, processes, CPU, and I/O. htop is an interactive process viewer but not necessarily installed by default; sar collects and reports system activity over time. However, the correct trio here is top, iostat, vmstat. htop is a top alternative, and sar is for historical data. The question asks for tools to collect and display, so sar qualifies but not installed by default? Typically top, iostat, vmstat are standard sysstat and procps packages. To align with exam, choose these three.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related XK0-005 NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 24, 2026
This XK0-005 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the XK0-005 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.