This EX200 practice question tests your understanding of essential tools. 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.
Which THREE commands can be used to monitor real-time process status and update the display every 2 seconds? (Choose three.)
htop
htop is an interactive process viewer that updates in real-time.
top -d 2
top with -d 2 sets the delay between updates to 2 seconds.
ps aux
Why wrong: ps aux shows a snapshot of processes, does not update.
watch -n 2 ps aux
watch runs the specified command every 2 seconds.
at 2
Why wrong: at is used for scheduling tasks at a specific time, not for monitoring.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
htop
A is correct because `htop` is an interactive process viewer that by default updates in real-time (every ~1-2 seconds) and allows you to monitor processes dynamically. It provides a color-coded, user-friendly interface with CPU, memory, and swap usage bars, updating continuously without needing a separate interval flag.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
htop
Why this is correct
htop is an interactive process viewer that updates in real-time.
Related concept
Read the scenario before looking for a memorised answer.
top -d 2
Why this is correct
top with -d 2 sets the delay between updates to 2 seconds.
Related concept
Read the scenario before looking for a memorised answer.
ps aux
Why it's wrong here
ps aux shows a snapshot of processes, does not update.
watch -n 2 ps aux
Why this is correct
watch runs the specified command every 2 seconds.
Related concept
Read the scenario before looking for a memorised answer.
at 2
Why it's wrong here
at is used for scheduling tasks at a specific time, not for monitoring.
Common exam traps
Red Hat often tests the distinction between snapshot commands (like `ps aux`) and real-time monitoring tools (like `top`, `htop`, or `watch`), trapping candidates who think `ps aux` can update continuously without an external wrapper like `watch`.
Trap categories for this question
Command / output trap
ps aux shows a snapshot of processes, does not update.
Detailed technical explanation
Under the hood, `top -d 2` sets the delay interval between screen updates to 2 seconds using the `-d` flag (default is 3 seconds on most systems). `watch -n 2 ps aux` runs `ps aux` every 2 seconds by leveraging the `watch` command's `-n` interval, clearing the terminal and re-executing the command to simulate real-time monitoring. `htop` uses the `/proc` filesystem to read process data and employs `ncurses` for its interactive display, refreshing based on a configurable delay (default ~1.5 seconds).
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the EX200 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
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FAQ
Essential Tools — This question tests Essential Tools — Read the scenario before looking for a memorised answer..
The correct answer is: htop — A is correct because `htop` is an interactive process viewer that by default updates in real-time (every ~1-2 seconds) and allows you to monitor processes dynamically. It provides a color-coded, user-friendly interface with CPU, memory, and swap usage bars, updating continuously without needing a separate interval flag.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
This EX200 practice question is part of Courseiva's free Red Hat 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 EX200 exam.
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