Deck 11: Compression, System Backup, and Software Installation

Question 1

What device file below indicates the first ATAPI IDE tape device (nonrewinding)?​

A) ​/dev/st0
B) ​/dev/nst0
C) ​/dev/ht0
D) ​/dev/nht0

Answer 1

D

Question 2

What is the average compression ratio for the gzip utility using the LZ77 compression algorithm?

A) 40%-50%
B) 50%-60%
C) 60%-70%
D) 70%-80%

Answer 2

C

Question 3

When using the gzip utility, the -1 option is also known as best compression and results in a higher compression ratio.

Answer 3

False

Question 4

Select the option that, when used with the gzip command, causes the compression ratio for files that have been compressed to be listed:

A) -c
B) -f
C) -r
D) -l

Question 5

​What command can be used to search for DPM package information?

A) ​dpkg-search
B) ​dpkg-info
C) ​dpkg-query
D) ​dpkg-list

Question 6

What command can be used to display the contents of a file that was compressed with the compress utility?

A) acat
B) zcat
C) cat
D) ccat

Question 7

When used with the uncompress command, what option displays the contents of the compress file to Standard Output?

A) -c
B) -v
C) -f
D) -r

Question 8

If no level of compression is specified, the gzip command assumes what compression level?

A) 4
B) 5
C) 6
D) 7

Question 9

Most Linux distributions make use of what package manager?

A) RPM
B) PRM
C) MPR
D) RMP

Question 10

Because the Makefile often includes some documented items, it is good form to read the Makefile after running the configure script.

Question 11

An RPM package can be converted to a cpio archive using what command?

A) ​cpioconv
B) ​rpm2cpio
C) ​rpmconv
D) ​conv_arch

Question 12

The compress utility preserves the original ownership, modification, and access time for each file that it compresses.

Question 13

When used with the compress command, what option below can be used to compress symbolic links?

A) -f
B) -c
C) -v
D) -r

Question 14

What option can be added to the rpm command in order to query packages?​

A) ​-i
B) ​-q
C) ​-v
D) ​-h

Question 15

The dump/restore utility is limited to a maximum of how many different incremental backups?

A) seven
B) eight
C) nine
D) ten

Question 16

What command looks for a Makefile and uses the information within to compile the source code into binary programs using the appropriate compiler program for the local hardware architecture?

A) configure
B) install
C) make install
D) make

Question 17

The cpio command has the ability to handle long filenames and can be used to back up device files.​

Question 18

When using the compress utility, each file specified for compression is renamed with what extension?

A) .c
B) .cmp
C) .cpz
D) .Z

Question 19

The Adaptive Lempel-Ziv compression algorithm used by the compress utility is capable of an average compression ratio of what percent?

A) 30-40
B) 40-50
C) 50-60
D) 60-70

Question 20

The tar utility cannot back up device files or files with filenames longer than 255 characters.

Question 21

​The _________________ command can be used to search Internet software repositories for RPM packages that map to your architecture, and automatically install or upgrade those packages on your system.

Question 22

​RPM packages that require other RPM packages to be installed on a system prior to being installed creates a relationship known as?

A) ​package dependency
B) ​recursing package
C) branching package​
D) ​family package

Question 23

Packages in the Red Hat Package Manager format have filenames that indicate the hardware architecture for which the software was compiled, and end with the ____________________ extension.

Question 24

​​Match each correct item with the statement below.​​​
a.​Aptitude
b.​bunzip2 command
c.​checksum
d.compression ratio​
e.​gunzip command
f.​package group
g.​restore command
h.system backup
i.​tarball
j.zmore command
A group of RPM packages that are commonly installed to provide a specific function on the system.​

Question 25

In order to download DPM packages, what command should be used below?​

A) ​yum
B) ​apt-search
C) ​apt-get
D) ​dpm-grab

Question 26

Describe the difference between full and incremental backups. Explain how both might be used to implement a back-up strategy, mentioning how the dump/restore utility can assist in this implementation. Provide an example.

Question 27

​​Match each correct item with the statement below.​​​
a.​Aptitude
b.​bunzip2 command
c.​checksum
d.compression ratio​
e.​gunzip command
f.​package group
g.​restore command
h.system backup
i.​tarball
j.zmore command
​The amount of compression that occurred during compression algorithm.

Question 28

When backing up a system, what type of files should be archived, and what types should not?

Question 29

​​Match each correct item with the statement below.​​​
a.​Aptitude
b.​bunzip2 command
c.​checksum
d.compression ratio​
e.​gunzip command
f.​package group
g.​restore command
h.system backup
i.​tarball
j.zmore command
​A calculated value that is unique to a file's size and contents.

Question 30

​What yum command below can display a list of package group names?

A) ​yum list --groups
B) ​yum grouplist
C) ​yum --list -g
D) ​yum show groups

Question 31

​What option can be added to the rpm command to upgrade a specified package only if an older version exists on the system?

A) ​-F
B) ​-U
C) ​-z
D) ​-c

Question 32

A(n) ____________________ backup backs up only the data that has been changed since the last backup.

Question 33

​​Match each correct item with the statement below.​​​
a.​Aptitude
b.​bunzip2 command
c.​checksum
d.compression ratio​
e.​gunzip command
f.​package group
g.​restore command
h.system backup
i.​tarball
j.zmore command
​The process whereby files are copied to an archive.

Question 34

To view the contents of a file that was compressed with the bzip2 utility, you must use the ____________________ command.

Question 35

Give a short description of the gzip utility. What compression algorithm does it use, and what degree of compression is it typically able to achieve? What are some similarities and differences from the compress utility?

Question 36

​​Match each correct item with the statement below.​​​
a.​Aptitude
b.​bunzip2 command
c.​checksum
d.compression ratio​
e.​gunzip command
f.​package group
g.​restore command
h.system backup
i.​tarball
j.zmore command
​A utility that can be used to manage DPM packages using a graphical interface.

Question 37

What types of media are commonly used for archives? What type of media is most commonly used for archiving on Linux systems?

Question 38

The ____________________ utility uses the Burrows-Wheeler Block Sorting Huffman Coding algorithm when compressing files.

Question 39

​What option can be added to the dpkg command to remove a specified package from the system, including any configuration files used by the package?

A) ​-d
B) ​-P
C) ​-D
D) ​-r

Question 40

Describe the basic steps involved in compiling source code into a program.

Question 41

​​Match each correct item with the statement below.​​​
a.​Aptitude
b.​bunzip2 command
c.​checksum
d.compression ratio​
e.​gunzip command
f.​package group
g.​restore command
h.system backup
i.​tarball
j.zmore command
​A gzip-compressed tar archive.

Question 42

​Select the options to use with the cpio utility to cause the utility to extract files from an archive, and overwrite existing files during extraction without prompting for user confirmation:

A) ​-u
B) ​-i
C) ​-e
D) ​-f

Question 43

​​Match each correct item with the statement below.​​​
a.​Aptitude
b.​bunzip2 command
c.​checksum
d.compression ratio​
e.​gunzip command
f.​package group
g.​restore command
h.system backup
i.​tarball
j.zmore command
A command used to view the contents of an archive created with compress or gzip to Standard Output in a page-by-page fashion.​

Question 44

What two device files below represent the first SCSI tape device, rewinding and non-rewinding?​

A) ​/dev/st0
B) ​/dev/ftape
C) ​/dev/nst0
D) ​/dev/ht0

Question 45

​What two options can be used with the tar utility to either compress or decompress an archive using the gzip or compress utilities respectively?

A) ​-z
B) ​-Z
C) ​-u
D) ​-e

Question 46

​​Match each correct item with the statement below.​​​
a.​Aptitude
b.​bunzip2 command
c.​checksum
d.compression ratio​
e.​gunzip command
f.​package group
g.​restore command
h.system backup
i.​tarball
j.zmore command
​A command used to decompress files compressed by the gzip command.

Question 47

​​Match each correct item with the statement below.​​​
a.​Aptitude
b.​bunzip2 command
c.​checksum
d.compression ratio​
e.​gunzip command
f.​package group
g.​restore command
h.system backup
i.​tarball
j.zmore command
​A command used to extract archives created with the dump command.

Question 48

What two commands below can be used to view the contents of a bzip2-compressed file page by page?​

A) ​bzmore
B) ​bzless
C) ​bzpaged
D) bzbuffer

Question 49

​​Match each correct item with the statement below.​​​
a.​Aptitude
b.​bunzip2 command
c.​checksum
d.compression ratio​
e.​gunzip command
f.​package group
g.​restore command
h.system backup
i.​tarball
j.zmore command
​A command used to decompress files compressed by the bzip2 command

Question 50

Files with what two file extensions are commonly known as tarballs?​

A) ​.tar.b
B) ​.tar.gz
C) ​.tgz
D) ​.tz