Linux - IO redirection - multichoice questions

Question 1

To allow the search pattern HELLO to match both hello and HELLO, you would use the grep command with which command line switch?

• -i
• -r
• -w
• -k
• None of the above

Question 2

Which of the following command lines would list all lines from /usr/share/dict/words which contain the text sun, preceded by their line number?

• grep -n sun /usr/share/dict/words
• grep -N /usr/share/dict/words sun
• grep -r /usr/share/dict/words sun
• grep -r sun /usr/share/dict/words
• None of the above

Question 3

Which of the following command lines would list every line which contains the text cdrom from the file README, along with two lines of context before and after the matching line?

• grep cdrom README | head -2 | tail -2
• grep -n2 cdrom README
• grep -n2 README cdrom
• grep -k2 cdrom README
• None of the above

Question 4

Which of the following command lines would list the names of files (and only the names of files) found underneath the /etc directory which contain the word network (i.e., the word networking would not count).

• grep -rwl network /etc
• grep -wl network /etc
• grep -rl network /etc
• grep -ilw network /etc
• None of the above

Question 5

The command echo file.1 file.2 will

• copy file.1 to file.2
• display the contents of file.1 and file.2 on STDOUT
• produce an error message because there is no redirection symbol
• display "file.1 file.2" on STDOUT

Question 6

For the user elvis, with /home/elvis for a home directory, which of the following commands would succeed on a default Ubuntu Linux installation?

• ls /etc > /etc/lsetc.txt
• /etc/lsetc.txt < ls /etc
• ls /etc > /home/elvis/lsetc.txt
• /home/elvis/lsetc.txt < ls /etc

Question 7

Which of the following commands would successfully redirect the output of the cal command to the file lsout.txt?

• lsout.txt > cal
• cal ==> lsout.txt
• cal > lsout.txt
• cal } lsout.txt

Question 8

Given the file logs.txt. Which of the following commands may increase the size of the file (its total bytes)

• cat logs.txt
• echo "hiiiiiiiiiiiiiiiiiiii" > logs.txt
• rm logs.txt
• None of the above

Question 9

Given the file logs.txt. Which of the following commands will necessarily increase the size of the file (its total bytes)

• cat logs.txt
• echo "hiiiiiiiiiiiiiiiiiiii" > logs.txt
• rm logs.txt
• None of the above

Question 10

Which of the following command lines would list lines from the file /etc/group which contain the text elvis?

• grep /etc/group elvis
• echo elvis | grep /etc/group
• echo /etc/group | grep elvis
• A and C
• None of the above

Question 11

Which of the following command lines would return the number of lines which contain the text freedom found in the file /usr/share/doc/redhat-release-5Server/GPL?

• grep freedom /usr/share/doc/redhat-release-5Server/GPL | wc -w
• grep freedom /usr/share/doc/redhat-release-5Server/GPL | wc -l
• grep freedom /usr/share/doc/redhat-release-5Server/GPL | wc -c
• grep freedom /usr/share/doc/redhat-release-5Server/GPL | wc -n
• None of the above

Question 12

To copy file1.txt to file2.txt, you could use

• cp file1.txt > file2.txt
• cat file1.txt > file2.txt
• dupe file1.txt file2.txt
• mv file1.txt file2.txt

Question 13

What will be in out.txt?

ls nonexistentfile | grep "No such file" > out.txt

• No such file
• ls: cannot access nonexistentfile: No such file or directory
• Nothing, out.txt will be empty.
• It will be the contents of nonexistentfile.