How do you symbolically link /usr/games/starwar with a file of the same name in

ID: 3540580 • Letter: H

Question

How do you symbolically link /usr/games/starwar with a file of the same name in your current directory?

Question 1 options:

1) ln . /usr/games/starwar

2) ln /usr/games/starwar .

3) ln -s . /usr/games/starwar

4) ln -s /usr/games/starwar .

Question 2 (1 point) Question 2 Unsaved

In the following command line

wc >file1 < file2

Question 2 options:

1) input for wc will come from file1

2) input for wc will come from file2

3) input for wc will come from keyboard

Question 3 (1 point) Question 3 Unsaved

How do you show lines 5 to 10 of file foo?

Question 3 options:

1) tail +5 foo | head

2) tail +10 foo | head -5

3) head foo | tail +5

4) head -5 foo | tail +10

Question 4 (1 point) Question 4 Unsaved

How do you know how many different users are logging into the system?

Question 4 options:

1) who | uniq | sort | wc -l | cut -d' ' -f1

2) who | cut -d' ' -f1 |sort | uniq | wc -l

3) who | uniq | sort | cut -d' ' -f1 | wc -l

4) who | wc -l | sort | cut -d' ' -f1

Question 5 (1 point) Question 5 Unsaved

Which one will you use to make sure that a process is killed?

Question 5 options:

1) kill -9

2) ctrl-C

3) kill -7

4) kill -8

Question 6 (1 point) Question 6 Unsaved

How to run a command in the background

Question 6 options:

1) put an '&' at the end of the command

2) put 2> at the end of the command

3) put ? at the end of the command

4) put ';' at the end of the command

Question 7 (1 point) Question 7 Unsaved

What can be put into the first line of your script to make sure a script will use the Bourne shell?

Question 7 options:

1) #!/bin/csh

2) #/bin/sh

3) #!/bin/sh

4) $/bin/sh

Question 8 (1 point) Question 8 Unsaved

Which special parameter indicates the name of the script?

Question 8 options:

1) $#

2) $?

3) $1

4) $0

Question 9 (1 point) Question 9 Unsaved

When you look for a pattern in files ignoring case which one will you use?

Question 9 options:

1) grep -v

2) grep -i

3) grep -e

4) grep -l

Question 10 (1 point) Question 10 Unsaved

Frame regular expression to match lines containing Mcgee Macgee mcghee magee.

Question 10 options:

1) [Mm]a?c?gh*ee

2) [Mm][ac]gh*ee

3) [Mm]a?c?gh?ee

4) [Mm]a*c*gh?**

Question 11 (1 point) Question 11 Unsaved

Which of the following represents an absolute path?

Question 11 options:

1) ~/bin/file1

2) /bin/file1

3) ./bin/file1

4) bin/file1

Question 12 (1 point) Question 12 Unsaved

Which of these commands will set the permissions on file textfile to read and write for the owner, read for the group, and nothing for everyone else?

Question 12 options:

1) chmod 046 textfile

2) chmod 640 textfile

3) chmod 310 textfile

4) chmod 710 textfile

Question 13 (1 point) Question 13 Unsaved

When you use the ln -s command, which of the following occurs?

Question 13 options:

1) a file is created that points to an existing file

2) a file is created that is a copy of an existing file

3) a file is moved from one location to another

4) a file is renamed

Question 14 (1 point) Question 14 Unsaved

Which command will print the contents of all files in the current directory whose names start with the character 'a' and end with a period ('.') followed by any two characters followed by a number?

Question 14 options:

1) ls a*.??[0-9]

2) ls a*.??#

3) cat a*.??[0-9]

4) cat a?.**#

Question 15 (1 point) Question 15 Unsaved

Which of these situations would cause an error message to be printed after typing the command my_script on the command line, assuming that my_script is a bash script?

Question 15 options:

1) my_script does not have execute permission set

2) the current working directory is not in the PATH

3) both a) and b)

4) neither a) nor b)

Question 16 (1 point) Question 16 Unsaved

In a bash script, how does one indicate the beginning and end of a block of statements in a while loop?

Question 16 options:

1) with { and }

2) with [ and ]

3) with while and elihw

4) with do and done

Question 17 (1 point) Question 17 Unsaved

To compare equality for two integers, val1 and val2, using test command (assuming bash script), you use

Question 17 options:

1) test val1 -eq val2

2) test val = val2

3) [ val1 = val2 ]

Question 18 (1 point) Question 18 Unsaved

What is the default list upon which a for loop operates in a bash script (i.e. a script contains for x rather than for x in y)?

Question 18 options:

1) the list of files in the current working directory

2) the list of currently running processes

3) the list of arguments to the script

4) the list 1, 2, 3, 4, ...

Question 19 (1 point) Question 19 Unsaved

Which of these is not a situation in which you could use regular expressions?

Question 19 options:

1) filtering of email coming from a particular internet domain name

2) calculation of student grades based on percentages

3) extraction of all transactions in a database with a customer number of 1000 or less

4) specification of the format of a string representing a zip code

Question 20 (1 point) Question 20 Unsaved

Which of the following is not a file stream opened automatically in a UNIX program?

Question 20 options:

1) standard input

2) standard terminal

3) standard error

4) standard output

Question 21 (1 point) Question 21 Unsaved

In UNIX, a process refers to what?

Question 21 options:

1) compiled source code

2) uncompiled source code

3) an executing instance of a program

4) an executable file

Question 22 (1 point) Question 22 Unsaved

System administration tasks must generally be performed by which username?

Question 22 options:

1) admin

2) root

3) sysadm

4) user

Question 23 (1 point) Question 23 Unsaved

How can you append the output of a command to a file?

Question 23 options:

1) command > file

2) command 2> file

3) command < file

4) command >> file

Question 24 (1 point) Question 24 Unsaved

If umask is set to 022, what is the default setting for a newly created directory?

Question 24 options:

1) Owner has read, write, execute rights, all the others can read.

2) Owner has read, write, execute rights, all the others can write.

3) Owner has read, write, execute rights, all the others can read and execute.

4) Owner has no rights, all the others can write.

Question 25 (1 point) Question 25 Unsaved

Which of the following command can extract from a tar file called game.tar

Question 25 options:

1) untar game.tar

2) tar xvf game.tar

3) tar -cvf game.tar

4) tar zvf game.tar

Question 26 (1 point) Question 26 Unsaved

The command grep computer /etc/* | more will show all files with the search word

Question 26 options:

1) etc

2) more

3) grep

4) computer

Question 27 (1 point) Question 27 Unsaved

Assuming file1 contains one column of data and file2 contains another column of data. To combine the data in file1 and file2 side by side and save the data in file3, we can use

Question 27 options:

1) cat file1 file2 > file3

paste file1 file2 > file3

3) file3 = file1 + file2

4) cat file1 file2 >> file3

Question 28 (1 point) Question 28 Unsaved

what is missing from the unix command for looking for rose garden in all files in ~: grep rose garden ~/* | more

Question 28 options:

1) [ ]

2) " "

3) < >

4) nothing is missing

Question 29 (1 point) Question 29 Unsaved

The command

cut -f2 -d: data > temp

will write the second ___ of data table to temp

Question 29 options:

1) word

2) row

3) column

4) letter

Question 30 (1 point) Question 30 Unsaved

Which of the following command will find all the files named test in /

Question 30 options:

1) grep test /

2) grep -r test /

3) find / -name test -print

4) find -f test / 2> /dev/null

Explanation / Answer