LFCS Linux-Foundation Exam Questions and Free Practice Test

Question 55

Which of the following commands will reduce all consecutive spaces down to a single space?

A. tr '\s' ' ' < a.txt > b.txt

B. tr -c ' ' < a> b.txt

C. tr -d ' ' < a> b.txt

D. tr -r ' ' '\n' < a>b.txt

E. tr -s ' ' < a> b.txt

Correct Answer:E

Question 56

Which run levels should never be declared as the default run level when using SysV init? (Choose TWO correct answers.)

A. 1

B. 3

C. 5

D. 6

Correct Answer:AE

Question 57

Which of the following files assigns a user to its primary group?

A. /etc/pgroup

B. /etc/shadow

C. /etc/group

D. /etc/passwd

E. /etc/gshadow

Correct Answer:D

Question 58

What is true regarding the command sendmail?

A. With any MTA, the sendmail command must be run periodically by the cron daemon.

B. All MTAs, including Postfix and Exim, provide a sendmail command.

C. The sendmail command prints the MTAs queue history of which mails have been sent successfully.

D. It is only available when the sendmail MTA is installed.

Correct Answer:B

Question 59

What is the output of the following command? echo "Hello World" | tr -d aieou

A. Hello World

B. eoo

C. Hll Wrld

D. eoo Hll Wrld

Correct Answer:C

Question 60

CORRECT TEXT
Which file contains a set of services and hosts that will be allowed to connect to the server by going through a TCP Wrapper program such as tcpd? (Specify the full name of the file, including path.)https://lh3.googleusercontent.com/-5cd- clmKnbk/AAAAAAAAAAI/AAAAAAAAADM/-SXesH19Ido/s46-c-k-no/photo.jpg

Correct Answer:/etc/hosts.allow

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