LFCS Linux-Foundation Exam Questions and Free Practice Test

Question 13

What does the ? symbol within regular expressions represent?

A. Match the preceding qualifier one or more times.

B. Match the preceding qualifier zero or more times.

C. Matchthe preceding qualifier zero or one times.

D. Match a literal ? character.

Correct Answer:C

Question 14

Which of the following commands can be used to download the RPM package kernel without installing it?

A. yum download --no-install kernel

B. yumdownloader kernel

C. rpm --download --package kernel

D. rpmdownload kernel

Correct Answer:B

Question 15

What happens after issuing the command vi without any additional parameters?

A. vi starts and loads the last file used and moves the cursor to the position where vi was when it last exited.

B. vi starts and requires the user to explicitly either create a new or load an existing file.

C. vi exits with an error message as it cannot be invoked without a file name to operate on.

D. vi starts in command mode and opens a new empty file.

E. vi starts and opens a new file which is filled with the content of the vi buffer if the buffer contains text.

Correct Answer::D

Question 16

Which of the following characters can be combined with a separator string in order to read from the current input source until the separator string, which is on a separate line and withoutany trailing spaces, is reached?

A. <<

B. <|

C. !<

D. &<

Correct Answer:A

Question 17

Which of the following commands redirects the output of cmd to the file foo.txt, in which an existing file is overwritten?

A. cmd || foo.txt

B. cmd | foo.txt

C. cmd && foo.txt

D. cmd >> foo.txt

E. cmd > foo.txt

Correct Answer:E

Question 18

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

A. result: 3 4 5 6 2 1

B. result: 1 2 3 4 5 6

C. result: 6 5 4

D. result: 6 5 4 3 2 1

E. result: 3 2 1

Correct Answer:A

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