Reference no: EM133218245

QUESTION 1

When you are moving files, using the -o option with the mv command can be a good idea so that you don't unexpectedly overwrite a destination file with the same name.

True

False

QUESTION 2

The command rmdir can be used to delete a directory that is not empty.

True

False

QUESTION 3

UNIX/Linux store data, such as letters, product records, or vendor reports, in flat ASCII files.

True

False

QUESTION 4

When you use cat to combine two files into a third file, the first line of the output contains the first line of the first file followed by the first line of the second file.

True

False

QUESTION 5

When you use the paste command, by default, the pasted results appear in columns separated by commas.

True

False

QUESTION 6

You can use the < operator to redirect a command's output from the screen to a file.

True

False

QUESTION 7

The pipe operator can connect several commands on the same command line.

True

False

QUESTION 8

When using wc, you cannot specify all three options ( -l, -w and -c) in the command line at the same time.

True

False

QUESTION 9

A popular use of pr is to convert lowercase characters to uppercase characters.

True

False

QUESTION 10

You can use the less command with a directory to view its contents one screen at a time, such as less / sbin.

True

False

QUESTION 11

System administrators and programmers refer to standard output as ____.

sout

stout

stdout

standardout

QUESTION 12

To redirect the list of the files in a directory to a file called homedir.list, you enter ____.

ls < homedir.list

ls > homedir.list

homedir.list < ls

homedir.list > ls

QUESTION 13

You can use the ____ operator to redirect commands or program error messages from the screen to a file.

1>

2>

3>

4>

QUESTION 14

The command > accountsfile ____.

deletes the file accountsfile

is not valid in UNIX/Linux systems

displays the contents of the file accountsfile on the screen

creates an empty file called accountsfile

QUESTION 15

You can use the ____ command to create empty files.

touch

create

make

cd

QUESTION 16

When you no longer need a file, you can delete it using the ____ command.

rm

mv

rmdir

delete

QUESTION 17

To move a file, you use the ____ command along with the source file name and destination name.

cp

rename

mv

move

QUESTION 18

The ____ option of the paste command is used to specify a different separator as a delimiter.

-t

-o

-d

-s

QUESTION 19

If you execute ____, the contents of file1 are sorted and the results are stored in file2.

sort file1 -o file2

sort file1 -d file2

sort file1 > file2

sort file1 file2

QUESTION 20

The join -1 2 -2 3 f1 f2 -t: command uses ____ .

the 1st field of f1 file to join the 2nd field of f2 file with the colon separator

the 1st field of f1 file to join the 3rd field of f2 file with the colon separator

the 2nd field of f1 file to join the 2nd field of f2 file with the colon separator

the 2nd field of f1 file to join the 3rd field of f2 file with the colon separator

QUESTION 21

____ is NOT a selection command.

comm

diff

grep

sed

QUESTION 22

The ____ redirects the output of one command to the input of another command.

output redirection operator (>)

input redirection operator (<)

pipe operator (|)

tilde (~)

QUESTION 23

You use the ____ command to search for a specified pattern in a file, such as a particular word or phrase.

find

grep

sed

diff

QUESTION 24

The ____ command removes duplicate lines from a file.

grep

mv

uniq

diff

QUESTION 25

The ____ option of the uniq command instructs it to generate as output only the lines of the source file that are not duplicated successively.

-d

-s

-o

-u

QUESTION 26

The ____ command locates identical lines within two identically sorted files.

diff

sed

uniq

comm

QUESTION 27

The ____ option of the diff command ignores blanks that repeat.

-b

-B

-c

-l

QUESTION 28

The ____ function within the awk command is used to format output.

out

outln

print

printf

QUESTION 29

You use the ____ character in script files to mark comments.

tilde (~)

dollar ($)

pipe (|)

pound (#)

QUESTION 30

After you create a shell script to run in Bash, you can immediately run the script by typing ____ and then the name of the script.

run

sh

start

exec