200.1 Measure and Troubleshoot Resource Usage (weight: 6) LPIC-2 Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   Which command-line utility displays a real-time, dynamic view of CPU usage per process and also provides a summary of overall system CPU utilization at the top of its output?

   • Aifstat
   • Biostat
   • Ctop
   • Dfree
   Reveal Solution Discussion Select an answer first
2. 2application · medium

   A server has 16 GB of RAM. `free -m` shows: total=16384, used=15000, free=1384, shared=100, buff/cache=0, available=1200. The administrator notices the system is using swap. Which metric from `/proc/meminfo` would best confirm whether the system is under memory pressure?

   • A`SwapTotal` — if it is high, the system has enough swap headroom
   • B`MemAvailable` — if it is low, the system is under memory pressure
   • C`MemFree` — if it is low, the system is under memory pressure
   • D`Committed_AS` — if it exceeds `CommitLimit`, the system is overcommitted
   Reveal Solution Discussion Select an answer first
4. 3application · medium

   A server's load average has climbed from 1.0 to 8.0 over the past 10 minutes. `free -m` shows: total=8192, used=7800, free=392, buff/cache=0, available=350. `vmstat 1` shows `si` and `so` columns consistently above 500. Which action will most directly reduce the load average?

   • AReduce the kernel's `vm.vfs_cache_pressure` to keep more dentries in memory
   • BIncrease the swap space to allow more processes to be swapped out
   • CIdentify and terminate or restart the process consuming the most memory
   • DReboot the server to clear the memory and reset the load average
   Reveal Solution Discussion Select an answer first
5. 4foundation · easy

   A system is experiencing high load due to excessive disk I/O. Which command would you use to identify which processes are performing the most disk I/O?

   • Aiotop
   • Bmpstat
   • Css
   • Dfree
   Reveal Solution Discussion Select an answer first
6. 5expert · hard

   A backup process runs nightly and causes severe performance degradation for users. `iostat -x 1` during the backup shows: sda %util=100%, await=300ms; sdb %util=10%, await=5ms. The backup writes to sda. The administrator has a second disk (sdb) that is mostly idle. Which approach best resolves the performance issue?

   • AReduce the backup's block size to make writes more efficient
   • BSchedule the backup to run at a time when fewer users are active
   • CIncrease the backup process's I/O priority using `ionice` to ensure it completes faster
   • DMove the backup target to sdb to spread I/O across both disks
   Reveal Solution Discussion Select an answer first