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Tecnologia da Informação (TI)
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Questões de LFCS

Pratique com as questões oficiais e inéditas do exame LFCS.

21
medium
Linux Administration
Com explicação

What output will the following command sequence produce? echo '1 2 3 4 5 6' while read a b c; do echo result: c b $a; done

22
medium
Linux Administration
Com explicação

When the command echo $ outputs 1, which of the following statements is true?

23
medium
Linux Administration
Com explicação

What output will the command seq 10 produce?

24
medium
Linux Administration
Com explicação

After issuing: function myfunction { echo 1 2; } in Bash, which output does: myfunction A B C Produce?

25
medium
Linux Administration
Com explicação

Which of the following commands puts the output of the command date into the shell variable mydate?

26
medium
Linux Administration
Com explicação

Which command will display messages from the kernel that were output during the normal boot sequence?

27
medium
Linux Administration
Com explicação

Which of the following files, when existing, affect the behavior of the Bash shell? (Choose TWO correct answers.)

28
medium
Linux Administration
Com explicação

What is the difference between the commands test -e path and test -f path?

29
medium
Linux Administration
Com explicação

How can the existing environment variable FOOBAR be suppressed for the execution of the script./myscript only?

30
medium
Linux Administration
Com explicação

What output will the following command produce? seq 1 5 20

31
medium
Linux Administration
Com explicação

Which of the following commands lists all defined variables and functions within Bash?

32
medium
Linux Administration
Com explicação

What is the purpose of the file /etc/profile?

33
medium
Linux Administration
Com explicação

Which of the following commands will write a message to the terminals of all logged in users?

34
medium
Linux Administration
Com explicação

For accessibility assistance, which of the following programs is an on-screen keyboard?

35
medium
Linux Administration
Com explicação

Which of the following kernel parameters instructs the kernel to suppress most boot messages?

36
medium
Linux Administration
Com explicação

Which file specifies the user accounts that can NOT submit jobs via at or batch?

37
medium
Linux Administration
Com explicação

In case neither cron.allow nor cron.deny exist in /etc/, which of the following is true?

38
medium
Linux Administration
Com explicação

Which of the following commands can remove a user from a group?

39
medium
Linux Administration
Com explicação

Which of the following options for the kernel's command line changes the systemd boot target to rescue.target instead of the default target?

40
medium
Linux Administration
Com explicação

Which of the following crontab entries will execute myscript at 30 minutes past every hour on Sundays?