010-160 The Power OF The Command Line Practice Test 3 — 15 Questions

Question 1

How do you check the exit status of the last command executed?

Accepted Answer

echo $?. The $? variable holds the exit status of the previous command.

Answer

echo $#

Answer

echo $!

Answer

echo $status

Question 2

To sort the lines of a text file numerically instead of alphabetically, which flag do you use?

Accepted Answer

sort -n. -n enables numeric sorting.

Answer

sort -f

Answer

sort -u

Answer

sort -r

Question 3

Which TWO of the following are valid commands for displaying file contents?

Accepted Answer

cat. cat and less are common tools for viewing files.

Answer

touch

Answer

chmod

Answer

grep

Question 4

Which THREE of the following are valid flags for the 'tar' command?

Accepted Answer

-z. -c, -x, and -z are standard tar flags.

Answer

-q

Answer

-p

Question 5

Which TWO of the following commands can be used to redirect input from a file?

Accepted Answer

cat file | command. The '<' operator and the 'cat' command piped to another tool are valid methods.

Answer

&&

Answer

>

Answer

>>

Question 6

Which TWO of the following regex patterns are valid for grep to match the beginning or end of a line?

Accepted Answer

$. ^ matches the start, $ matches the end.

Answer

\

Answer

.

Answer

*

Question 7

Which THREE of the following are environment variables commonly seen in a Linux shell?

Accepted Answer

USER. PATH, USER, and HOME are core environment variables.

Answer

ROOT

Answer

FILE

Question 8

Which THREE of the following represent ways to manipulate command output in a pipe?

Accepted Answer

grep. grep, sed, and wc are standard stream processing tools.

Answer

cd

Answer

pwd

Question 9

Which TWO of the following are commands to delete files or directories?

Accepted Answer

rmdir. rm and rmdir are used for deletion.

Answer

ls

Answer

cp

Answer

mv

Question 10

Which THREE of the following are valid ways to run commands sequentially?

Accepted Answer

;. &&, ||, and ; are standard shell operators.

Answer

|

Answer

>

Question 11

Which THREE of the following tools can be used for text processing?

Accepted Answer

awk. grep, sed, and awk are core text processing utilities.

Answer

cat

Answer

ls

Question 12

Which TWO of the following help manage compressed archive contents?

Accepted Answer

gzip. tar and gzip/gunzip are used for archive and compression management.

Answer

find

Answer

cat

Answer

grep

Question 13

Which THREE of the following are common shell built-in command types?

Accepted Answer

echo. cd, echo, and export are standard shell built-ins.

Answer

grep

Answer

tar

Question 14

Which TWO of the following signals can be used to interact with processes?

Accepted Answer

SIGTERM. SIGTERM and SIGKILL are standard signals.

Answer

SIGSTOPPED

Answer

SIGEXIT

Answer

SIGRUN

Question 15

Which THREE of the following are valid ways to get help on a command?

Accepted Answer

info command. man, info, and --help are standard help methods.

Answer

help command

Answer

search command