715.3 Create, Monitor and Kill Processes (weight: 3) BSD-SPECIALIST Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   Which signal is used to forcefully stop a process and cannot be caught, blocked, or ignored?

   • ASIGTERM
   • BSIGINT
   • CSIGHUP
   • DSIGKILL
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2. 12foundation · easy

   A system shows a load average of 0.00, 0.01, 0.05. What does this indicate about the system's workload?

   • AThe system has exactly one process running at all times.
   • BThe system is heavily overloaded and processes are waiting for CPU time.
   • CThe system has been consistently busy over the last 15 minutes.
   • DThe system is mostly idle, with very few processes needing CPU time.
   Reveal Solution Discussion Select an answer first
4. 13expert · hard

   A system administrator needs to run a CPU-intensive simulation that will take several hours. The simulation must not interfere with interactive users, but it must complete within a specific deadline. The administrator starts the simulation with `nice -n 19 ./simulation`. After 30 minutes, the administrator notices that the simulation is progressing too slowly and may miss the deadline. What should the administrator do?

   • AUse `renice -n -10 -p <PID>` to increase the priority of the simulation above the default level.
   • BStop the simulation and restart it with `nice -n 0` to run at default priority.
   • CLeave the simulation at its current priority and accept that it may miss the deadline.
   • DUse `renice -n 0 -p <PID>` to increase the priority of the simulation to the default level.
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   A developer reports that a batch job is consuming excessive CPU and slowing down other users' interactive sessions on a shared server. The administrator runs `top` and identifies the process PID 2345 as the culprit. The job is a custom script that does not respond to SIGTERM. What should the administrator do to stop the process?

   • ARun `kill -KILL 2345` to forcefully terminate the process.
   • BRun `renice 2345` to lower its priority and reduce CPU impact.
   • CRun `kill -TERM 2345` and wait for the process to exit gracefully.
   • DRun `kill -STOP 2345` to pause the process instead of terminating it.
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6. 15expert · hard

   A server with 8 CPU cores is running a mix of web and database workloads. The administrator runs `top` and sees the following: `load average: 16.50, 12.30, 8.10`. The `top` output shows several processes in 'D' (uninterruptible sleep) state, and the `wa` (I/O wait) column in `vmstat` is consistently above 60%. The administrator needs to identify the root cause. What is the most likely conclusion?

   • AThe system is experiencing heavy disk I/O, causing processes to wait for storage and inflating the load average.
   • BThe system is under attack, and the load average is caused by malicious processes.
   • CThe system is swapping heavily, and the load average is caused by memory pressure.
   • DThe system is overloaded due to CPU-bound processes consuming all available cores.
   Reveal Solution Discussion Select an answer first