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Exam 11: Compression, System Backup, and Software Installation

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Question 21

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

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Question 22

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

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

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Question 23

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​​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.​

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?

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

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

​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.

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.

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

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

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

​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:

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

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

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

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

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

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

​​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.

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