Unix interview questions part 7
Unix interview questions part 7
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Total Questions: 20
1. Which of the following commands can be used to replace ‘professor’ with ‘director’ throughout the whole file?
Correct Answer is : 1,$s/professor/director/g and %s/professor/director/g
2. Which of the following flag will be used for interactive substitution?
Correct Answer is : gc
3. Which one of the following commands will be used to delete all the instances of string ‘manager’ in file003?
Correct Answer is : 1,$s/manager/ /g
4. Which one of the following command is invalid?
Correct Answer is : :1,%/file01/file02/g
5. Search and replace operations can also use regular expressions for matching multiple patterns.
Correct Answer is : TRUE
6. Which command is used for comparing two files?
Correct Answer is : cmp
7. What is the exit status of cmp command if both the files are identical?
Correct Answer is : 0
8. Which option is used with cmp command to display a detailed list of mismatches?
Correct Answer is : -l
9. Which option is used with cmp command to limit the number of bytes to be compared?
Correct Answer is : -n
10. How can we skip some initial bytes from both the files to be compared?
Correct Answer is : using -i option
11. -b option is used with cmp command to print the differing bytes in both files.
Correct Answer is : TRUE
12. Which command compares two sorted files line by line?
Correct Answer is : comm
13. What will be the command if we want to suppress column 1 and column 2 in the output of comm Command?
Correct Answer is : comm -12
14. For comm command to work properly, files specified should be sorted.
Correct Answer is : TRUE
15. Which command is used to display the differences between files?
Correct Answer is : diff
16. When two files are identical, what is the output of diff command?
Correct Answer is : Returns prompt
17. Which option is used to produce multi columnar output in diff command?
Correct Answer is : -y
18. If we are interested in knowing that whether the two files are identical or not, we can use ___ command.
Correct Answer is : cmp
19. Which of the following is used to compress files?
Correct Answer is : gzip
20. Which one of the following extension is provided by gzip to the compressed filename?
Correct Answer is : .gz
