Crucial Exams

CompTIA Linux+ XK0-006 (V8) Practice Question

Users report that a ticket-tracking web application hosted on a single Linux server becomes noticeably sluggish during peak usage. While the slowdown is in progress, you capture the following statistics on the 4-core host:

top (14:18:07)
%Cpu(s):  3.7 us,  1.1 sy,  0.0 ni,  0.1 id, 94.6 wa,  0.5 hi,  0.0 si,  0.0 st

iostat -dx 5
Device:            r/s     w/s    rkB/s   wkB/s rrqm/s wrqm/s %util
nvme0n1          18.4   773.2    962.7  7879.3    0.0    0.1  99.4

vmstat 5
procs  -----------memory--------- ---swap-- -----io---- --system-- -----cpu-----
 r  b   swpd  free  buff  cache   si  so    bi   bo   in   cs us sy id wa st
 1  3     0  12472 13004 2219644  0   0    130 1702 1020 2020  4  1  0 94  0

Which change is most likely to improve the page-load latency without modifying application code?

  • Raise the vm.swappiness value so the kernel pages inactive memory sooner.

  • Lower the primary interface's MTU from 1500 to 1400 bytes to avoid packet fragmentation.

  • Move the application's database and log files to faster storage (for example, an SSD array or dedicated NVMe device).

  • Aggregate two NICs in an 802.3ad (LACP) bond to increase available network bandwidth.

CompTIA Linux+ XK0-006 (V8)
Troubleshooting
Your Score:
Settings & Objectives
Random Mixed
Questions are selected randomly from all chosen topics, with a preference for those you haven’t seen before. You may see several questions from the same objective or domain in a row.
Rotate by Objective
Questions cycle through each objective or domain in turn, helping you avoid long streaks of questions from the same area. You may see some repeat questions, but the distribution will be more balanced across topics.

Check or uncheck an objective to set which questions you will receive.

Wipe Score
Bash, the Crucial Exams Chat Bot
AI Bot