proba tema 10.docx

8/11/2019 Proba Tema 10.docx

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Arrancado o Martes, 7 de Outubro do 2014, 10:51

Estado Finalizada

Completada en Martes, 7 de Outubro do 2014, 10:58

Tempo levado 7 mins 40 segundos

Cualificación 5,00 alén dun máximo de 10,00 (50%)

Pregunta 1

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Texto da pregunta

Select the line that best represents what permissions the /etc/passwd file should have

Selecciona unha:

a. -rw-r--r-- 1 root root 531 Apr 3 12:36 /etc/passwd

b. all answers listed are not correct

c. -rw-r--r-- 1 1 1 531 Apr 3 12:36 /etc/passwd

d. -rw------- 1 root root 531 Apr 3 12:36 /etc/passwd

Comentarios

A súa resposta é correcta.

The correct answer is: -rw-r--r-- 1 root root 531 Apr 3 12:36 /etc/passwd

Pregunta 2

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Texto da pregunta

The command echo $! will produce what output?



Selecciona unha:

a. the exit status of the last command

b. the exit status of the last background command

c. the process id of the current shelld. the process id of last background command

Comentarios

A súa resposta é incorrecta.

The correct answer is: the process id of last background command

Pregunta 3


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Texto da pregunta

You want the default permissions for your files to be -rw-r-----. How must you setumask?

Selecciona unha:

a. 027

b. 640

c. 038

d. 037

Comentarios


The correct answer is: 027

Pregunta 4




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Texto da pregunta

What umask will set the file permissions on a newly created file to -rw-r--r-- (644)?

Selecciona unha:

a. 0002

b. 0022

c. 0246

d. 0224

Comentarios


The correct answer is: 0022

Pregunta 5


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What would the following line accomplish if run as root?

chown -R bert /home/bert/*

Selecciona unha:

a. Nothing, this command is invalid

b. It would set ownership of all files and subdirectories in /home/bert to bert

c. It would change user ownership of all files in /home/bert to bert

d. It would set the group ownership of the directory /home/bert to bert



Comentarios


The correct answer is: It would set ownership of all files and subdirectories in

/home/bert to bert

Pregunta 6


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Texto da pregunta

You have read/write permission on an ordinary file foo. You have just run ln foo bar.What would happen if you ran rm foo?

Selecciona unha:

a. foo and bar would both be removed

b. foo would be removed. bar would still exist but would be unsuable

c. Both foo and bar would remain accesible

d. foo would be removed while bar would remain accessible

Comentarios


The correct answer is: foo would be removed while bar would remain accessible

Pregunta 7


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Which shell built-in command can be used to create a shorcut or pseudonym for alonger command?

Assume a modern bourne-like shell, such as bash.

Selecciona unha:

a. ln

b. link

c. sudo

d. alias

Comentarios


The correct answer is: alias

Pregunta 8


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Texto da pregunta

Which command will print out the attributes of the file foobar?

Selecciona unha:

a. ls --attr foobar

b. lsattr foobar

c. printattr foobar

d. fileattr foobar

Comentarios


The correct answer is: lsattr foobar

Pregunta 9




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Texto da pregunta

Which chown command will change the ownership to foo and the group to bar on a filenamed biglist?

Selecciona unha:

a. chown --user foo --group bar biglist

b. chown foo:bar biglist

c. chown -u foo -g biglist

d. chown foo/bar biglist

Comentarios


The correct answer is: chown foo:bar biglist

Pregunta 10


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Texto da pregunta

The sticky bit is usually set on

Selecciona unha:

a. log files

b. /home

c. /var/log

d. /tmp



Comentarios


The correct answer is: /tmp

proba tema 10.docx

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