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

Questions 26–29

1. 26application · medium

   A database server is slow. `iostat -x 1` shows: sda %util=85%, await=150ms, rkB/s=100, wkB/s=50000. The administrator notices the database is performing many small random writes. Which metric best explains the high await time?

   • AThe low `rkB/s` value indicates the disk is not reading enough data
   • BThe high `await` value indicates queuing delay caused by many small random writes
   • CThe high `wkB/s` value indicates the disk is writing too much data
   • DThe `%util` value of 85% indicates the disk is about to fail
   Reveal Solution Discussion Select an answer first
2. 27foundation · easy

   Which command, when run with the interval and count arguments (e.g., `vmstat 2 5`), reports CPU usage statistics including user time, system time, and idle time, along with memory and I/O statistics?

   • Aps
   • Bvmstat
   • Cnetstat
   • Dsar
   Reveal Solution Discussion Select an answer first
4. 28foundation · easy

   Which file in the /proc filesystem contains detailed, current memory usage information, including MemTotal, MemFree, Buffers, Cached, and SwapTotal?

   • A/proc/loadavg
   • B/proc/cpuinfo
   • C/proc/meminfo
   • D/proc/partitions
   Reveal Solution Discussion Select an answer first
5. 29application · medium

   An administrator needs to determine whether a server's network interface experienced packet drops during a specific incident that occurred three days ago. The sysstat package is installed and running. Which command provides the required historical data?

   • A`sar -n DEV -f /var/log/sa/saXX` where XX is the day of the incident
   • B`ifstat -t` to display current and historical throughput in a table
   • C`netstat -i` to show interface statistics including dropped packets
   • D`ss -s` to summarize socket statistics and identify past drops
   Reveal Solution Discussion Select an answer first