Braindumps for "Linux+" Exam

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Question 1.

Which of the following would correctly format a 3.5” diskette?



A. mkfs /dev/fd0

B. fdisk /dev/fd0

C. mount –f /mnt/floppy

D. mkfs –t vfat /mnt/floppy



Answer: A



Explanation:

The mkfs (make file system) command is used to format a disk. /dev/fd0 is the 
first floppy disk on a Linux system.



Reference:

Roderick W. Smith. Sybex Linux + Study Guide: Page 459-460.



Incorrect Answers:

B. Fdisk is used for partitioning a hard disk, not formatting a floppy disk.

C. The mount command is used to mount a drive, not to format a floppy disk.

D. Vfat is the wrong file system for a floppy disk. You should use the msdos 
option.



Question 2.

The administrator wants to use /sbin/special.sh to do a backup every Friday the 
13th. 



What would be a solution?



A. Run at “Fri, 13” < /sbin/special.sh

B. Run at ‘date | cut –d –e \f3’ /sbin/special.sh

C. Add “5 1 13 * 5 /sbin/spcial.sh “ to his crontab

D. Add “1 1 13 ** if [ ‘date’ == “Frid” ]; then /sbin/special.sh fi “ to his 
crontab



Answer: C



Explanation:

The crontab is used to schedule a program such as a backup program. The first 5 
signifies 5 minutes past the hour. The 1 signifies 01:00 (1.00 a.m.). The 13 
signifies the date of the month. 



The * signifies any month. The 5 signifies a Friday. This means that if the 13th 
day of a month is a Friday, the program will run at 01:05 (5 past 1 in the 
morning).



Reference:

Michael J. Tobler. New Riders, Inside Linux: Page 408/9.



Incorrect Answers:



A. The ‘at’ command can schedule a program, but it will only run once. Also, the 
syntax is incorrect.

B. The ‘at’ command can schedule a program, but it will only run once. Also, the 
syntax is incorrect.

D. The syntax is incorrect.



Question 3.

Which of the following commands is used to determine if network interfaces are 
up and running?



A. cksum

B. netcfg

C. siginit

D. ifconfig



Answer: D



Explanation:

The ifconfig command will display detailed information about an interface. The 
information will include the operational status of the interfaces.



Reference:

Roderick W. Smith. Sybex Linux + Study Guide: Page 335.



Incorrect Answers:

A. Cksum is used to calculate a Cyclic Redundancy Check to check a file for 
errors. It is not used to determine if network interfaces are up and running.

B. Netcfg is not used to determine if network interfaces are up and running.

C. Siginit is not used to determine if network interfaces are up and running.



Question 4.

Which of the following is LEAST affected by electromagnetic interference (EMI)?



A. Fiber Optic Cable

B. Encrypted Wireless

C. RG-68 Coaxial Cable

D. Shielded Twisted Pair (STP)



Answer: A



Explanation:

Fiber Optic cable uses pulses of light along a glass fiber to transmit data. As 
it uses no copper wires, it is immune to electromagnetic interference.



Reference:

http://www.erg.abdn.ac.uk/users/gorry/course/phy-pages/fibre.html 



Incorrect Answers:

B. Wireless data transmission is susceptible to electromagnetic interference.

C. Coaxial Cable uses copper wires and is therefore susceptible to 
electromagnetic interference.

D. Shielded Twisted Pair (STP) cable uses copper wires and is therefore 
susceptible to electromagnetic interference. It is less susceptible to EMI than 
UTP (unshielded twisted pair) because the copper wires are shielded.



Question 5.

If the Linux installation process continuously locks up, which of the following 
should be done?



A. Repartition the drive.

B. Remove all unnecessary hardware.

C. Enable power management in the BIOS.

D. Ensure that the network card is installed prior to the installation.



Answer: B



Explanation:

If a Linux installation continuously locks up, it is likely that a hardware 
device is incompatible with Linux. To troubleshoot this, you should remove all 
unnecessary hardware, and add the hardware one device at a time, to discover the 
incompatible device.



Incorrect Answers:

A. Repartitioning the drive will not resolve the problem.

C. Power management is more likely to cause problems, than resolve them.

D. It is not necessary to install the network card prior to an installation.



Question 6.

Under which of the following hardware upgrades would a system NOT have to be 
rebooted?



A. Upgrading the CPU.

B. Replacing a PS/2 mouse.

C. Adding a USB CDROM drive.

D. Installing additional RAM.



Answer: C



Explanation:

One of the features of USB devices is that they are ‘hot swappable’. This means 
that you can disconnect and reconnect USB devices without needing to reboot the 
system.



Reference:

Roderick W. Smith. Sybex Linux + Study Guide: Page 402.



Incorrect Answers:

A. The CPU can only be changed when the system is shut down.

B. A PS/2 mouse may not work if it has been replaced without rebooting the 
machine.

D. RAM can only be installed when the system is shut down.



Question 7.

Which of the following connectors is hot pluggable?



A. Serial port

B. Parallel port

C. IEEE-1394 port

D. Ultra2 SCSI external connector



Answer: C



Explanation:

An IEEE-1394 port is a firewire port. This is a relatively new technology 
provide high data transfer rates and is hot pluggable.



Reference:

http://www.apple.com/firewire/ 



Incorrect Answers:

A. Serial ports are not hot pluggable.

B. Parallel ports are not hot pluggable.

D. Ultra2 SCSI ports are not hot pluggable.



Question 8.

When SCSI, video and I/O boards are installed in a PC, which of the following 
allows the installed card to be integrated with the current system on a hardware 
level?



A. CMOS

B. POST

C. BIOS

D. Boot strap



Answer: A



Explanation:

The CMOS chip is the ‘configurable’ part of the BIOS. When the computer boots, 
the BIOS reads configuration information from the CMOS. The BIOS and CMOS are 
hardware and are not related to the operating system which is software.



Reference:

http://www.wimsbios.com/ 



Incorrect Answers:

B. The POST (power on self test) is the process of the BIOS checking the system 
for installed hardware during system boot up.

C. The BIOS cannot be directly configured. It reads its configuration 
information from the CMOS.

D. Boot Strap is the process of a computer booting up.



Question 9.

A user has three SCSI devices (two internal and one external) connected to his 
computer. He adds another external device, and this device and one of the 
internal devices do not work. 



Which of the following is the most likely cause?



A. An ID conflict

B. AN IRQ conflict

C. A memory conflict

D. A driver is not installed



Answer: A



Explanation:

SCSI devices use SCSI identifiers (IDs). Each device must have a unique SCSI ID 
to function correctly. If two devices have the same ID, none of the two devices 
will work.



Reference:

Roderick W. Smith. Sybex Linux + Study Guide: Page 32.



Incorrect Answers:

B. The SCSI devices don’t have separate IRQs. The SCSI controller (to which the 
SCSI devices are attached) uses one IRQ.

C. A memory conflict is less likely than an ID conflict.

D. If the driver wasn’t installed, only the recently added device would not 
work. The previously added devices would still work.



Question 10.

After the failed memory has been replaced, the PC does not boot and beeps 
several times. The beep code indicates there is no memory. The technician 
observes that the old SIMMs use 9 chips while the new SIMMs only use 8 chips. 
What is most likely the problem?



A. EDO memory is required

B. Parity memory is required

C. Fast Page Mode memory is required

D. Unregistered SDRAM memory is required



Answer: B



Explanation:

Parity memory boards have an extra chip for parity checking.



Reference:

http://www.anandtech.com/showdoc.html?i=113&p=6 



Incorrect Answers:

A. The extra chip indicates parity memory, not EDO memory.

C. The extra chip indicates parity memory, not Fast Page Mode memory.

D. The extra chip indicates parity memory, not SDRAM memory.



Question 11.

All of the following are common BIOS options EXCEPT



A. mouse type

B. parity/non parity

C. floppy drive type

D. hard drive auto-detect



Answer: A



Explanation:

The mouse type is not a common BIOS option although the PS/2 mouse PORT is often 
mentioned.



Incorrect Answers:

B. The option to disable or enable parity checking is common.

C. The floppy drive type, (3.5 inch or 5.25 inch) is a common option.

D. The option to disable or enable hard drive auto detection is common.



Question 12.

A user has just installed a new 3.5” diskette drive in his desktop computer. He 
turns the computer on and discovers that the diskette drive light stays on all 
the time. 



What is the most likely reason the light stays on?



A. The system BIOS is misconfigured.

B. The light on diskette drive is broken.

C. The power cable has not been connected properly.

D. The ribbon cable is inserted backwards in the drive.



Answer: D



Explanation:

Inserting the ribbon cable backwards is an easy mistake to make and often causes 
the symptoms mentioned in this question.



Reference:

http://www.computerhope.com/issues/ch000278.htm 



Incorrect Answers:

A. The only configurable floppy drive option is the size. The BIOS default would 
most likely have

the correct size (3.5 inch) configured.

B. If the light was broken, it wouldn’t come on at all.

C. If the power cable wasn’t connected, the light wouldn’t come on at all.



Question 13.

Which network interface card has BNC connector on it?



A. IR

B. Thinnet

C. Fiber optic

D. Twisted pair



Answer: B



Explanation:

Thinnet (otherwise known as 10Base2) uses the BNC connector.



Reference:

http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci211681,00.html 



Incorrect Answer:

A. IR (infra-red) is a wireless technology and therefore uses no connectors.

C. Fiber Optic does not use BNC connectors.

D. Twisted Pair does not use BNC connectors.



Question 14.

On a Plug-and-Play system, some legacy hardware (non-Plug-and-Play) is required.




Which of the following should be done to ensure the proper operation of all 
hardware on the system?



A. Enable IRQ routing in the BIOS.

B. Replace the BIOS with a non-Plug-and-Play BIOS.

C. Reserve the resources in CMOS for the legacy hardware.

D. Replace the legacy devices with current Plug-and-Play devices.



Answer: C



Explanation:

The resources for the legacy devices should be reserved in the CMOS. This will 
prevent the resources being dynamically assigned to plug and play devices, which 
would cause a resource conflict.



Reference:

Roderick W. Smith. Sybex Linux + Study Guide: Page 30.



Incorrect Answers:

A. It is not necessary to enable IRQ routing in the BIOS.

B. It is not necessary to replace the BIOS.

C. It is not necessary to replace the devices.



Question 15.

A battery fails in a Linux workstation. Which of the following will need to be 
reconfigured to get the system working after replacing the battery?



A. MBR settings

B. CMOS settings

C. POST settings

D. Data on each partition



Answer: B



Explanation:

The CMOS relies on a battery to ‘remember’ its configuration. If the battery 
fails, the

CMOS will need to be reconfigured.



Reference:

http://www.pcmech.com/show/motherboards/80/ 



Incorrect Anwers:

A. The MBR settings are written to the hard disk and do not rely on battery 
power.

C. The POST settings are in the BIOS which does not rely on battery power.

D. The data on each partition is written to the hard disk and does not rely on 
battery power.



Question 16.

A user adds a new CD-RW to an existing system with a diskette drive, single IDE 
hard disk drive, and CDROM drive. The user then reports the system is taking 
longer to load applications. 



Which of the following will most likely resolve the problem?



A. Switch the CD-RW to cable select.

B. Install CD-R accelerator software.

C. Replace the CD-RW drive, as it is damaged.

D. Move the CD-RW to the secondary IDE controller.



Answer: D



Explanation:

Most systems come with two IDE controllers. The hard disk is always on the 
primary IDE controller. System performance can be improved by installing CD 
devices on the secondary IDE controller so that they are separate to the hard 
drive.



Reference:

Roderick W. Smith. Sybex Linux + Study Guide: Page 31.



Incorrect Answers:

A. Using cable select will not improve system performance.

B. Moving the CD device to the secondary IDE controller will improve performance 
without the need for extra software. CD-R accelerator software may improve the 
CD-R performance, but it won’t improve the overall system performance.

C. It is unlikely that a faulty CD-RW would degrade the system performance.



Question 17.

A system’s serial device is not operating correctly. Which of the following IRQs 
is likely to be conflicting and causing the problem?



A. 4

B. 5

C. 7

D. 13



Answer: A



Explanation:

Serial devices use COM ports. COM ports 1 and 3 use IRQ 4.



Reference:

Michael J. Tobler. New Riders, Inside Linux: Page 137.



Incorrect Answers:

B. IRQ 5 is commonly used by sound cards.

C. IRQ 7 is commonly used by the parallel port.

D. IRQ13 is used by the Math co-processor.



Question 18.

A user has just hot-swapped the CDROM with the diskette drive in his mobile 
system. 



Now the diskette drive is not responding. Which of the following actions will 
correct the problem?



A. Reboot the system.

B. Reinstall the driver.

C. Remove the drive and reinstall it.

D. Set up hot-swapping capabilities in CMOS.



Answer: C



Explanation:

If a device doesn’t work after hot plugging it into a mobile system, the first 
troubleshooting step would be to remove the device and reinstall it.



Incorrect Answers:

A. It may not be necessary to reboot the system. Try refitting the device first.

B. If the device worked before, then the driver is already installed and does 
not need reinstalling.

D. Laptop PCMCIA devices are hot swappable. This does not need to be configured 
in the CMOS.



Question 19.

Which if the following IDs should be avoided when assigning IDs to SCSI 
peripherals?



A. 2

B. 4

C. 5

D. 7



Answer: D



Explanation:

SCSI devices need separate SCSI IDs. The SCSI controller itself uses a SCSI ID. 
This is usually

ID 7.



Reference:

http://cmtunix.tstc.edu/database/hardware/scsi.html 



Incorrect Answers:

A. The SCSI controller usually uses SCSI ID 7, not 2.

B. The SCSI controller usually uses SCSI ID 7, not 4.

C. The SCSI controller usually uses SCSI ID 7, not 5.



Question 20.

Which device commonly uses the ATAPI interface?



A. Modem

B. CD-ROM

C. Video card

D. Network card



Answer: B



Explanation:

CD-ROM devices commonly use the ATAPI interface.



Reference:

Roderick W. Smith. Sybex Linux + Study Guide: Page 24.



Incorrect Answers:

A. Modems commonly use the serial interface, not the ATAPI interface.

C. Video Cards commonly use the AGP interface, not the ATAPI interface.

D. Network cards commonly use PCI interfaces, not the ATAPI interface.



Question 21.

A user believes that his telecommunications software is not dialing his modem 
properly. 



Which of the following AT commands can be used to have the modem dial 432-3604?



A. AT4323604

B. ATM4323604

C. ATDT4323604

D. AT4323604DT



Answer: C



Explanation:

The ATDT<number> command is used to have a modem dial a number.



Reference:

http://www.option.co.za/hayesat.htm#Hayes%20AT%20Commands 



Incorrect Answers:



A. You need the ATDT command, not the AT command.

B. You need the ATDT command, not the ATM command

D. You need the ATDT command, not the AT command



Question 22.

A Linux vendor has recently come out with a necessary patch to the server 
software to improve security on the server. Which of the following is the best 
practice, if any, for updating this patch on a production system?



A. Never apply patches on production servers, because they may introduce errors 
and conflicts.

B. Apply the patch during business hours, to validate the patch under normal 
system operation.

C. Apply the patch onto a secondary system to test the patch before installing 
it on a production 

machine.

D. Apply the patch immediately to the production system, because security 
patches need to be 

installed right away.



Answer: C



Explanation:

Any new software or software patch should be installed on a secondary system and 
thoroughly tested before installation of production systems.



Reference:

Roderick W. Smith. Sybex Linux + Study Guide: Page 203.



Incorrect Answers:

A. A patch may introduce errors and conflicts, but this is why should test it 
first on a secondary system.

B. A patch should be tested on a secondary system before installation on a 
production system.

D. Security patches should be installed as soon as possible, but not before 
testing on a secondary system.



Question 23.

A Linux system crashes every day at the same time and needs to be rebooted. 



Which of the following would provide evidence of what was happening on the 
system at that time?



A. Run dmesg

B. Run uptime

C. Look in /etc/shutdown

D. Look in /var/log/messages



Answer: D



Explanation:

Most applications write error messages to files in the /var/log/messages 
directory. 



You should look here to see if you can discover what is causing the system to 
crash.



Reference:

Roderick W. Smith. Sybex Linux + Study Guide: Page 613.



Incorrect Answers:

A. Dmesg is a utility that displays the text that is displayed during system 
startup. You need find out what caused the system to crash before the reboot was 
necessary.

B. Uptime is a utility that displays how long the system has been running for.

C. Error messages are not written to this file or directory.



Question 24.

After installing Linux onto a dual-processor machine, the administrator suspects 
that only one processor initialized successfully during the boot process. How 
could this be verified?



A. Run cpuinfo

B. Check /var/log/messages for errors.

C. Run dmesg to review the log file.

D. Run ps to see if both CPUs appear.



Answer: A



Explanation:

Cpuinfo is a utility that displays information about all running processors on a 
system. If the output contains information about only one processor, then only 
one processor is working.



Reference:

http://www.cpan.org/modules/by-category/04_Operating_System_Interfaces/Linux/Linux-Cpuinfo-1.5.readme




Incorrect Answers:

B. A non-functional processor would generate any error messages in the error 
logs.

C. Dmesg displays the text that was displayed when the system booted. This will 
not contain any information about a non-functional processor.

D. Ps lists the running processes, not the processors.



Question 25.

A system has a utility that is regularly updated with new versions. Rather than 
overwriting the older versions, they need to be retained for testing purposes. 
Therefore, they keep older versions in the following format utility1.3 
utility1.4 utility1.5 What is the best way the system can be set up so that 
users cam simply type “utility” to run the latest version of the application?



A. Copy the latest version of the utility to “utility”.

B. Move the latest version of the utility to “utility”.

C. Make a symbolic link “utility” to the latest version.

D. Make a symbolic link from the latest version to “utility.lnk”.



Answer: C



Explanation:

A symbolic link is like a shortcut. A symbolic link named utility will open the 
file (program/utility) that the link points to, when a user types ‘utililty’.



Reference:

Roderick W. Smith. Sybex Linux + Study Guide: Page 134.



Incorrect Answers:

A. A copy of the latest version of the program should not be renamed ‘utility’ 
because other files that the program uses, might have links to the original 
program name.

B. The latest version of the program should be renamed ‘utility’ because other 
files that the program uses, might have links to the original program name.

D. The symbolic link needs to point to the latest version of the program.



Question 26.

A machine that usually executes its tasks very quickly becomes remarkably slow.




What information from the ps command would suggest that a process is problematic 
and must be killed?



A. A high CPU time.

B. A high process ID.

C. A high load average.

D. A high memory percentage.



Answer: A



Explanation:

The PS command is used to display information about the running processes. A 
faulty process can be recognized by having a high CPU time. This means that a 
high percentage of the processor time is spent trying to run the process. This 
can usually be fixed by restarting the process.



Reference:

Roderick W. Smith. Sybex Linux + Study Guide: Page 514.



Incorrect Answers:

B. The process ID is just an identifier for the process. A high ID would not 
slow the machine.

C. The PS command does not display the load average for the processor.

D. The PS command does not display information about the memory.

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