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27 Cards in this Set
- Front
- Back
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Which command entered without arguments is used to display a list of processes running in the current shell? a. ppid b. list c. pid d. ps |
d. ps |
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Which of the following statements is true? (Choose all that apply.) a. If /etc/at.allow exists, only users listed in it can use the at command. b. If /etc/cron.allow exists, only users listed in it can use the cron command. c. If /etc/cron.deny exists and /etc/cron.allow does not exist, any user not listed in /etc/cron.deny can use the cron command. d. If /etc/cron.allow and /etc/cron.deny exist, only users listed in the former can use the cron command, and any users listed in the latter are denied access to the cron command. e. If a user is listed in both /etc/cron.allow and /etc/cron.deny, then /etc/cron.deny takes precedence and the user cannot access the crontab command. |
a. If /etc/at.allow exists, only users listed in it can use the at command. b. If /etc/cron.allow exists, only users listed in it can use the cron command. |
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Where are individual user tasks scheduled to run with the cron daemon stored? a. /etc/crontab b. /etc/cron/(the user’s login name) c. /var/spool/cron d. /var/spool/cron/(the user’s login name) |
d. /var/spool/cron/(the user’s login name) |
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Which process will always have a PID of 1 and a PPID of 0? a. the kernel itself b. ps c. init d. top |
c. init |
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A process spawning or initiating another process is referred to as _______________. a. a child process b. forking c. branching d. parenting |
b. forking |
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As daemon processes are not associated with terminals, you must use the –e switch with the ps command to view them. True or False? |
True |
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Which of the following commands will most likely increase the chance of a process receiving more time slices? a. renice 0 b. renice 15 c. renice -12 d. renice 19 |
c. renice -12 |
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How can you bypass the wait function and send a user process to the background? a. This cannot happen once a process is executing; it can be done only when the commandis started by placing an ampersand (&) after it. b. This cannot happen; only daemon processes can run in the background. c. You can use the ps command. d. You can use the Ctrl+z key combination and the bg command. |
d. You can use the Ctrl+z key combination and the bg command. |
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The at command is used to _______________. a. schedule processes to run periodically in the background b. schedule processes to run periodically on a recurring basis in the future c. schedule processes to run at a single instance in the future d. schedule processes to run in the foreground |
c. schedule processes to run at a single instance in the future |
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What command is used to view and modify user jobs scheduled to run with cron? a. crontab b. cron c. ps d. sched |
a. crontab |
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Every process has a process ID and a _______________. a. fork process b. daemon c. child process d. parent process ID |
d. parent process ID |
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The killall command terminates _______________. a. all instances of a process with the same PPID b. all instances of a process with the same PID c. all instances of a process with the same priority d. all instances of a process with the same name |
d. all instances of a process with the same name |
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Nice values are used to affect process priorities using a range between _______________. a. 0 and 20 b. 0 and -19 c. -19 and 20 d. -20 and 19 |
d. -20 and 19 |
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What is the name given to a process not associated with a terminal? a. child process b. parent process c. user process d. daemon process |
d. daemon process |
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To kill a process running in the background, you must place a % character before its process ID. True or False? |
True |
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What kill level signal cannot be trapped? a. 1 b. 9 c. 3 d. 15 |
b. 9 |
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A runaway process that is faulty and consuming mass amounts of system resources_______________. a. is a zombie process b. is an orphaned process c. has a PPID of Z d. is a rogue process |
a. is a zombie process |
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When you run the ps command, how are daemon processes recognized? a. The terminal is listed as tty0. b. There is a question mark in the TTY column. c. There is an asterisk in the STIME column. d. There is a “d” for daemon in the terminal identification column. |
b. There is a question mark in the TTY column. |
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Which command is used to gain real-time information about processes running on the system, with the most processor-intensive processes listed at the beginning of the list? a. ps b. ps -elf c. top d. top -l |
c. top |
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Which command can be used to see processes running in the background? a. bg b. jobs c. ps -% d. fg |
b. jobs |
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In fixed partitioning all the partitions can be ___________. a. neither of these b. both of these c. unequal sizes d. equal sizes |
b. both of these |
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Allocated memory that is unused is called _________. a. external fragmentation b. fixed partitions c. internal fragmentation d. relocation |
c. internal fragmentation |
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Which of these use variable length partitions? a. dynamic partitions b. variable partitions c. fixed partitions d. paging |
a. dynamic partitions |
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Unallocated memory which is too small to be useful is _______________. a. none of these b. internal fragmentation c. dynamic fragmentation d. external fragmentation |
d. external fragmentation |
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In paging the memory space is divided into ________. a. pages b. partitions c. fragments d. frames |
d. frames |
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In paging the process is divided into ___________. a. partitions b. pages c. fragments d. frames |
b. pages |
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Order the memory management methods from best to worst. a. Best fit b. Next fit c. First fit |
c. First fit b. Next fit a. Best Fit |
