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QUESTION 76
Which signal is missing from the following command that is commonly used to instruct a daemon to reinitialize itself, including reading configuration files?
killall -s ____ daemon
Answer:
HUP, SIGHUP, 1
QUESTION 77
Which command displays a list of all background tasks running in the current shell? (Specify ONLY the command without any path or parameters.)
Answer:
jobs
QUESTION 78
Which Bash environment variable defines in which file the user history is stored when exiting a Bash process? (Specify ONLY the variable name.)
Answer:
HISTFILE
QUESTION 79
Which command is used in a Linux environment to create a new directory? (Specify ONLY the command without any path or parameters.)
Answer:
mkdir, /usr/bin/mkdir
QUESTION 80
Which command is used to create and initialize the files used to store quota information? (Specify ONLY the command without any path or parameters.)
Answer:
quotacheck
QUESTION 81
Which umask value will result in the default access permissions of 600 (rw——-) for files and 700 (rwx——) for directories? (Specify only the numerical umask value.)
Answer:
0077, 077
QUESTION 82
Which SysV init configuration file should be modified to disable the ctrl-alt-delete key combination?
A.   /etc/keys
B.   /proc/keys
C.   /etc/inittab
D.   /proc/inittab
E.   /etc/reboot
Answer: C
QUESTION 83
During a system boot cycle, what program is executed after the BIOS completes its tasks?
A.   The bootloader
B.   The inetd program
C.   The init program
D.   The kernel
Answer: A
QUESTION 84
Which run levels should never be declared as the default run level when using SysV init? (Choose TWO.)
A.   0
B.   1
C.   3
D.   5
E.   6
Answer: AE
QUESTION 85
Which of the following statements is correct when talking about /proc/?
A.   All changes to files in /proc/ are stored in /etc/proc.d/ and restored on reboot.
B.   All files within /proc/ are read-only and their contents cannot be changed.
C.   All changes to files in /proc/ are immediately recognized by the kernel.
D.   All files within /proc/ are only readable by the root user.
Answer: C
QUESTION 86
What of the following statements are true regarding /dev/ when using udev? (Choose TWO.)
A.   Entries for all possible devices get created on boot even if those devices are not connected.
B.   Additional rules for udev can be created by adding them to /etc/udev/rules.d/.
C.   When using udev, it is not possible to create block or character devices in /dev/ using mknod.
D.   The /dev/ directory is a filesystem of type tmpfs and is mounted by udev during system startup.
E.   The content of /dev/ is stored in /etc/udev/dev and is restored during system startup.
Answer: BD
QUESTION 87
Which of the following information is stored within the BIOS? (Choose TWO.)
A.   Boot device order
B.   Linux kernel version
C.   Timezone
D.   Hardware configuration
E.   The system’s hostname
Answer: AD
QUESTION 88
Which of the following commands reboots the system when using SysV init? (Choose TWO.)
A.   shutdown -r now
B.   shutdown -r “rebooting”
C.   telinit 6
D.   telinit 0
E.   shutdown -k now “rebooting”
Answer: AC
QUESTION 89
Which of the following are init systems used within Linux systems? (Choose THREE.)
A.   startd
B.   systemd
C.   Upstart
D.   SysInit
E.   SysV init
Answer: BCE
QUESTION 90
What information can the lspci command display about the system hardware? (Choose THREE.)
A.   Device IRQ settings
B.   PCI bus speed
C.   System battery type
D.   Device vendor identification
E.   Ethernet MAC address
Answer: ABD
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