Unix Mock Test 7 - Sanfoundry

10%

Question 1 of 10

1. To replace the string ‘director’ in the first five lines of file emp.lst with ‘manager’ we can use _____

sed ‘15s

sed ‘1,5s/director/manager/’ emp.lst

sed ‘1-5s/director/manager/’ emp.lst

sed ‘s/director/manager/’ emp.lst

Question 1 of 10

Question 2 of 10

2. Which option is used with sed for using multiple instructions?

-f

-n

-e

–f and -e

Question 2 of 10

Question 3 of 10

3. Which of the following is not a subset of BRE (basic regular expression) character subset?

ch+

Question 3 of 10

Question 4 of 10

4. Which one of the following is the correct syntax for grep command?

grep pattern filename

grep options filename(s)

grep options pattern filename(s)

grep options pattern

Question 4 of 10

Question 5 of 10

5. The syntax for using && is ______________

cmd1

cmd1 cmd2 &&

cmd1 && cmd2

cmd1 & cmd2&

Question 5 of 10

Question 6 of 10

6. We can use comparison operators without a ‘-‘.

False

True

Question 6 of 10

Question 7 of 10

7. What will be the function of the following command?
$ sed ‘s/ *|/|/g’ emp.lst

replace * with |

replace / with |

compress multiple spaces

erroneous output

Question 7 of 10

Question 8 of 10

8. Which option is used for sorting a file according to primary key?

-k

-t

-n

Question 8 of 10

Question 9 of 10

9. It is essential to use whitespaces when we use [].

True

False

Question 9 of 10

Question 10 of 10

10. Which one of the following command will be used for adding two spaces before every line in emp.lst?

sed ‘s/^/ /’ emp.lst

sed ‘s /$/ /’emp.lst

sed ‘s/$/

sed ‘s / / /’emp.lst

Question 10 of 10