Quiz: processes and signals

Question 1 of 10

What top, ps, and jobs show, how to get your terminal back, how kill differs from kill -9, and where a zombie comes from. The questions follow the lessons “Observing processes”, “Background jobs and the terminal”, and “Signals and process termination”.

10 questions · threshold 70%

Read the output

Which process started the thumbs that keeps the CPU busy?

$ ps -C thumbs -o pid,ppid,%cpu,args
    PID    PPID %CPU COMMAND
   1053    1051  0.1 /usr/bin/python3 /usr/local/bin/thumbs --new
   1057    1054  0.1 /usr/bin/python3 /usr/local/bin/thumbs --new
   1058    1054 98.2 /usr/bin/python3 /usr/local/bin/thumbs --all

systemd with PID 1
Process 1058
Process 1051
Process 1054

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