This function first checks the calling process’s handle table to ensure that the index (handle) passed to it identifies an object that the process does in fact have access to. If the index is valid, the system gets the address of the kernel object’s data structure and decrements the usage count member in the structure; if the count is zero, the kernel destroys the kernel object from memory.
What is job number? a) same as PID b) a unique number, assigned to each job in shell c) both (a) and (b) d) none of the mentioned
Ctrl-Z key combination a) generates a SIGINT signal b) stops the process running in the shell c) kills the process running in the shell d) both (a) and (c)
Which command brings a background job into the foreground? a) fg b) bg c) jobs %1 d) none of the mentioned
'kill %s' command will a) terminate the job whose command line starts with s b) terminate the last job c) terminate the first job d) none of the mentioned
'stty tostop' command will a) stop all jobs running in the shell b) stop background jobs if they try to send output to the terminal c) this is not a valid command d) none of the mentioned
Which command terminates a running process by name of the process? a) kill b) pkill c) killall d) none of the mentioned
Which command prints the accumulated user and system times for processes run from the shell? a) time b) times c) both (a) and (b) d) none of the mentioned
Which command wait for the specified process to complete and return the exit status? a) sleep b) wait c) delay d) stop
Which command identifies the resource of a command? a) type b) typeset c) select d) source
The command 'ulimit' a) set a limit on specified resource for system users b) set/show process resource limit c) both (a) and (b) d) none of the mentioned
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