11868178
Descripción
Test por Carlos Alberto Jara Alva, actualizado hace más de 1 año
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Creado por Carlos Alberto Jara Alva
hace casi 7 años
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Pregunta 1
Pregunta
What are common IRQs for RS-232 serial ports? (Select two)
Respuesta
-
1
-
3
-
4
-
8
-
16
Pregunta 2
Pregunta
What tool would you use to disable a motherboard's sound hardware if you don't want to use it?
Respuesta
-
The firmware
-
The alsactl utility
-
The lsmod command
-
The lspci program
-
None of the above; onboard sound devices can't be disabled
Pregunta 3
Pregunta
What is purpose of udev?
Respuesta
-
To aid in the development of software
-
To unload Linux device drivers
-
To load Linux device drivers
-
To store devices' BIOS configurations in files
-
To manage the /dev directory tree
Pregunta 4
Pregunta
You've just installed Linux on a new computer with a single SATA hard disk. What device identifier will refer to the disk?
Respuesta
-
/dev/sda
-
/dev/mapper/disk1
-
/dev/hda
-
C:
-
/dev/sda or /dev/hda
Pregunta 5
Pregunta
Which files contain essential system information such as IRQs, direct-memory access channels, and I/O addresses? (Select three).
Respuesta
-
/proc/ioports
-
/proc/ioaddresses
-
/proc/dma
-
/proc/interrupts
-
/proc/hardware
Pregunta 6
Pregunta
The fdisk -l /dev/sda on a Linux computer with an MBR disk produces a listing of four partitions: /dev/sda1, /dev/sda2, /dev/sda5 and /dev/sda6. which of the following true?
Respuesta
-
The disk contains two primary partitions and two extended partitions.
-
Either /dev/sda1 or /dev/sda2 is an extended partition.
-
The partition table is corrupted; there should be a /dev/sda3 and a /dev/sda4 before /dev/sda5
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If you add a /dev/sda3 with fdisk, /dev/sda5 will become /dev/sda6, and /dev/sda6 will become /dev/sda7
-
Both /dev/sda1 and /dev/sda2 are logical partitions.
Pregunta 7
Pregunta
Which of the following directories is most likely to be placed on its own hard disk partition?
Respuesta
-
/bin
-
/sbin
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/mnt
-
/home
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/dev
Pregunta 8
Pregunta
What mount point should you associate with swap partitions?
Respuesta
-
/
-
/swap
-
/boot
-
/mem
-
None of the above
Pregunta 9
Pregunta
Which of the folllowing options is used with fsck to force it to use a particular filesystem type?
Respuesta
-
-A
-
-N
-
-t
-
-C
-
-f
Pregunta 10
Pregunta
What does the following command accomplish?
#mkfs -t ext2 /dev/sda4
Respuesta
-
It sets the partition table type code for /dev/sda4 to ext2
-
It converts FAT partition into an ext2fs partition without damaging the partition's existing files.
-
Nothing; the -t option isn't valid, and so it causes mkfs to abort its operation.
-
It converts an ext2 filesystem to an ext4 filesystem
-
It creates a new ext2 filesystem on /dev/sda4, overwriting any existing filesystem and data.
Pregunta 11
Pregunta
Which of the following pieces of information can df not report?
Respuesta
-
How long the filesystem has been mounted
-
The number of inodes used on an ext3fs partition
-
The filesystem type of a partition
-
The percentage of available disk space used on a partition.
-
The mount point associated with a filesystem
Pregunta 12
Pregunta
To access file on a USB flash drive, you type mount /dev/sdc1 /media/flash as root. Which types of filesystems will this command mount?
Respuesta
-
Ext2fs
-
FAT
-
HFS
-
ReiserFS
-
All of the above
Pregunta 13
Pregunta
What filesystem options might you specify in /etc/fstab to make a removable disk (such as a USB flash drive) mountable by an ordinary user with a UID of 1000? (Select three)
Respuesta
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user
-
users
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owner
-
owners
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uid=1000
Pregunta 14
Pregunta
What is the preferred method of adding a directory to the library path for all users?
Respuesta
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Modify the LD_LIBRARY_PATH environment variable in a global shell script.
-
Add the directory to the /etc/ld.so.conf file, and then type ldconfig.
-
Type ldconfig /new/dir, where /new/dir is the directory you want to add.
-
Create a symbolic link from that directory to one that's already on the library path.
-
Type ldd /new/dir, where /new/dir is the directory you want to add.
Pregunta 15
Pregunta
What programs might you use to learn what your system's load average is? (Select two)
Respuesta
-
ld
-
load
-
top
-
uptime
-
la
Pregunta 16
Pregunta
Which of the following commands creates a display of processes, showing the parent-child relationships through links between their names?
Respuesta
-
ps --forest
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ps aux
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ps -e
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ps --tree
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All of the above
Pregunta 17
Pregunta
Which of the following commands are equivalent to one another? (Select two)
Respuesta
-
nice --value 10 crunch
-
nice -n -10 crunch
-
nice -10 crunch
-
nice 10 crunch
-
nice crunch
Pregunta 18
Pregunta
What command is used at the beginning of a command line to detach tha process from a terminal, allowing it to continue running after the user has logged out?
Respuesta
-
hangup
-
detach
-
nohup
-
background
-
bg
Pregunta 19
Pregunta
What command will display a full-screen, updated list of all running processes?
Respuesta
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kill
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ps
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list
-
top
-
free
Pregunta 20
Pregunta
What command can be used to kill processes by name, rather than process ID?
Respuesta
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killproc
-
killname
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killall
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kill -name
-
killpath
Pregunta 21
Pregunta
What command is used to display the number of free inodes on an ext2 or ext3 partition?
Respuesta
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tune2fs
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dumpe2fs
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showe2fs
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fsck
-
fdisk
Pregunta 22
Pregunta
What command is used to convert an existing ext2 partition (/dev/sda1) to an ext3 (journaled) partition?
Respuesta
-
tune2f -j /dev/sda1
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dumpe2fs -j /dev/sda1
-
fsck -j /dev/sda1
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mkfs.ext2 -j /dev/sda1
-
None of the above
Pregunta 23
Pregunta
Which of the following are examples of journaling filesystems? (Select three)
Respuesta
-
ext2
-
ext3
-
xfs
-
reiserfs
-
vfat
Pregunta 24
Pregunta
Which file defines what partitions are mounted at boot time?
Respuesta
-
/etc/partitions
-
/etc/mount
-
/etc/mtab
-
/etc/fstab
-
/etc/filesystems
Pregunta 25
Pregunta
Which of the following is a reasonable size for a swap partition for a Linux workstation with 128 MB RAM? Select one
Respuesta
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1 KB
-
0.5 MB
-
100 MB
-
5 GB
-
10 GB
Pregunta 26
Pregunta
Which of the following is the text file that contains directories where the dynamic linker should look for libraries? Select one.
Respuesta
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ld.so.conf
-
conf.ld.so
-
ld.so.cache
-
so.config
-
configld
Pregunta 27
Pregunta
What two commands display the status of processes on a Linux system?
Respuesta
-
ls and df
-
ps and top
-
ps and df
-
df and top
-
du and df
Pregunta 28
Pregunta
Which of the following commands can be used to check an ext2 filesystem? Select three that apply.
Respuesta
-
fsck -ext2 /dev/hda5
-
fsck /dev/hda5
-
e2fsck /dev/hda5
-
fsck.ext2 /dev/hda5
-
fsck.linux /dev/hda5
Pregunta 29
Pregunta
In response to fhe df command, the system reports a use% of 98% for the filesystem mounted on /home. Which one of the following best describes the significance of this information?
Respuesta
-
Files on /home are consuming 90% of the physical disk.
-
File read/write activity on /home is consuming 98% of system I/O capacity
-
Files on /home are consuming 98% of the /home filesystem
-
Inodes on /home are nearly exhausted
-
Inodes on /home are 98% free
Pregunta 30
Pregunta
Which one of the following commands would be best suited to mount a CD-ROM containing a Linux distribution, without depending on any configuration files?
Respuesta
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mount /dev/cdrom /dev/hdc
-
mount -f linux /dev/hdc /mnt/cdrom
-
mount -t iso9660 /dev/cdrom /mnt/cdrom
-
mount -t linux /dev/cdrom /mnt/cdrom
-
mount -t iso9660 /mnt/cdrom /dev/cdrom
Pregunta 31
Pregunta
What character is used after a command line to indicate that tha command should run in the background and return shell control to the user?
Respuesta
-
*
-
+
-
&
-
-
-
.
Pregunta 32
Pregunta
A process with PID 4077 is misbehaving on your system. As superuset, you enter the following command:
#kill 4077
However, nothing changes as a result. What can you do to terminate the process? Select one
Respuesta
-
kill -9 4077
-
kill -1 4077
-
kill +9 4077
-
kill 4078
-
kill --die 4077
Pregunta 33
Pregunta
How many IDE devices can be installed and simultaneously used in a typical Intel-Based system? Select one
Respuesta
-
1
-
2
-
3
-
4
-
5
Pregunta 34
Pregunta
Which of the following Linux filesystems preallocates a fixed number of inodes at the filesystem's make/ creation time and does NOT generate them as needed? (Choose TWO correct answers.)
Respuesta
-
ext3
-
JFS
-
ext2
-
XFS
-
procfs
Pregunta 35
Pregunta
Which of the following commands changes the number of days before the ext3 filesystem on /dev/sda1 has to run through a full filesystem check while booting?
Respuesta
-
tune2fs -d 200 /dev/sda1
-
tune2fs -c 200 /dev/sda1
-
tune2fs -i 200 /dev/sda1
-
tune2fs -n 200 /dev/sda1
-
tune2fs --days 200 /dev/sda1
Pregunta 36
Pregunta
Creating a hard link to an ordinary file returns an error. What could be the reason for this?
Respuesta
-
The source file is hidden.
-
The source file is read-only.
-
The source file is a shell script.
-
The source file is already a hard link.
-
The source and the target are on different filesystems.
Pregunta 37
Pregunta
Which of the following environment variables overrides or extends the list of directories holding shared libraries?
Respuesta
-
LD_LOAD_PATH
-
LD_LIB_PATH
-
LD_LIBRARY_PATH
-
LD_SHARE_PATH
-
LD_RUN_PATH
Pregunta 38
Pregunta
Which of the following is the device file name for the second partition on the only SCSI drive?
Respuesta
-
/dev/hda1
-
/dev/sda2
-
/dev/sd0a2
-
/dev/sd1p2
Pregunta 39
Pregunta
When starting a program with the nice command without any additional parameters, which nice level is set for the resulting process?
Respuesta
-
-10
-
0
-
10
-
20
Pregunta 40
Pregunta
Which of the following commands overwrites the bootloader located on /dev/sda without overwriting the partition table or any data following it?
Respuesta
-
dd if=/dev/zero of=/dev/sda bs=512
-
dd if=/dev/zero of=/dev/sda bs=512 count=1
-
dd if=/dev/zero of=/dev/sda bs=440 count=1
-
dd if=/dev/zero of=/dev/sda bs=440
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