performance hard Apply priority 2 points

Question 47. CSCD240-E1-A

PID 9142 — reduce priority (increase nice value to +10) without stopping it.

Work the drill

Answer on paper or in a terminal before revealing the ideal answer.

Ideal answer

renice 10 9142

Acceptable alternatives: ["renice -n 10 -p 9142", "renice +10 -p 9142"]

Misconception bank

Each row below is a plausible wrong answer, the thinking that produces it, and the remedy that corrects the misconception. These are the foundation of the multiple-choice framing and the targeted feedback a student receives after answering.

nice -n 10 kill 9142

Misconception. Kills the process and applies nice to the already-dead target.

Remedy. nice is for NEW processes; renice is for RUNNING processes.

kill -10 9142

Misconception. Sends SIGUSR1 signal, not a nice-value change.

Remedy. Signals ≠ nice values. Different mechanisms.

Authority mappings

Hover any chip for the mapping justification; click to open the authority record.

DCWF roles: IT-451 System Administrator

DCWF tasks: T0501

KU outcomes: CD-OSC-O2

KU topics: CD-OSC-T3

Course-artifact links

Lectures

CSCD240-S26-L08. Pipes, filters, grep, sort, uniq, wc, tar

Lab questions

CSCD240-S26-LAB6: Start a command, kill with default signal; start again, kill -9.