JN0-106 User Interfaces Practice Question
An engineer needs to view the current operational state of the device, including system uptime, CPU load, and memory usage. Which two commands would provide this information? (Choose two.)
⚠ Common exam trap
It's easy for candidates to confuse 'show system processes' with providing CPU load averages and memory totals, when in fact it only shows per-process statistics and not the aggregate system load or overall memory usage.
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
✓
show system uptime
Option B, 'show system uptime,' is correct because on Junos devices this command reports the current time, how long the device has been running (system uptime), and the load averages for 1, 5, and 15 minutes, directly satisfying the uptime and CPU load requirements. Option D, 'show system memory,' is correct because it displays memory utilization statistics, including total, used, and free memory, which fulfills the memory usage portion of the request. Option A, 'show system processes,' lists running processes and their CPU/memory consumption per process rather than the overall system uptime and aggregate load, so it does not match the scenario as directly. Option C, 'show system storage,' reports disk and filesystem space usage, not CPU load or memory, and Option E, 'show chassis hardware,' displays hardware inventory and component information, neither of which provides the requested operational state.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
show system processes
Why it's wrong here
show system processes displays a snapshot of the routing engine's active processes, including PID, CPU time, and memory utilization per process. It is a granular diagnostic tool for identifying a specific process consuming excessive resources, but it does not present a consolidated system-level view of overall CPU load or aggregate memory in the way the operational state query requires.
- ✓
show system uptime
Why this is correct
show system uptime is the correct command for viewing the current operational state of the system's CPU. It reports the time since the last reboot, the current time, and critically, the 1-, 5-, and 15-minute load averages, which reflect the average number of threads in the run queue over those intervals. These load averages directly indicate overall CPU demand and are the standard first check for system health on Junos.
- ✗
show system storage
Why it's wrong here
show system storage focuses exclusively on the filesystem and disk usage, showing space allocated and available on the routing engine's storage media (e.g., /, /config, /var/tmp). It provides no insight into CPU load averages, memory pressure, or process activity, so while it is an operational state check, it is for storage, not for the CPU or memory state the engineer needs to assess.
- ✓
show system memory
Why this is correct
show system memory reports the routing engine's memory statistics, including physical memory and buffer usage, as well as current memory allocated to various Junos subsystems. It is directly relevant to the operational state of memory, but it does not provide any CPU load averages. If the engineer's question is about CPU specifically, this command answers only the memory side, making it incorrect for that narrow purpose.
- ✗
show chassis hardware
Why it's wrong here
show chassis hardware enumerates the physical components installed in the chassis, such as the Routing Engine, FPCs, PICs, power supplies, and fans, along with their serial numbers and hardware revision levels. It reports static inventory information, not dynamic operational state like CPU load or memory usage, so it cannot be used to assess the current running state of the system's processors or memory.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This JN0-106 practice question is part of Courseiva's free Juniper Networks 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 JN0-106 exam.