010-160 Archiving and Compression 4

Question 1

Which compression tool generally achieves the highest compression ratio among gzip, bzip2, and xz?

Accepted Answer

xz

Answer

xz typically achieves the best compression ratio of the three but is also the slowest to compress and decompress.

Question 2

What does `tar -tf archive.tar` output?

Accepted Answer

A list of filenames stored in the archive

Answer

The -t flag lists the table of contents of a tar archive, showing each filename stored within it.

Question 3

Which option makes `zip` compress files recursively including subdirectories?

Accepted Answer

-r

Answer

The -r option tells zip to recurse into directories and include all files and subdirectories in the archive.

Question 4

What is the result of running `bzip2 -d file.txt.bz2`?

Accepted Answer

Decompresses to file.txt and removes file.txt.bz2

Answer

By default, bzip2 -d removes the compressed file and replaces it with the decompressed version.

Question 5

Which command creates a tar archive without any compression?

Accepted Answer

tar -cf archive.tar files/

Answer

Using only -c and -f without -z, -j, or -J creates a plain uncompressed tar archive.

(010-160) LPI Linux Essentials Practice Test