Unix problems
- 1. The Octal number to be given alogn with chmod command to make a file readable, writable and executable to the owner, readable and executable to group and others is:
Options- A. 000
- B. 755
- C. 744
- D. 555
- E. None of the above Discuss
Correct Answer: 755
- 2. Which of the following options will be used to display number of blocks used by a file?
Options- A. -c
- B. -i
- C. -d
- D. -s
- E. None of the above Discuss
Correct Answer: -s
- 3. Which option will be used with ps command to slow the entire command line of the process being run?
Options- A. -4
- B. -f
- C. -1
- D. -2
- E. None of the above Discuss
Correct Answer: -f
- 4. Which command is used to display a file contents in octal form?
Options- A. cd
- B. od
- C. of
- D. oct
- E. None of the above Discuss
Correct Answer: od
- 5. The second set of the three permissions (r-) indicates that
Options- A. group has read permission only
- B. other has read permission only
- C. owner has read permission only
- D. group has write permission only
- E. None of the above Discuss
Correct Answer: group has read permission only
- 6. Which of the following special shell variables is used to process number of the last background job?
Options- A. $!
- B. $#
- C. $0
- D. $*
- E. None of the above Discuss
Correct Answer: $!
- 7. Which of the following commands is used to identify the type of file by context?
Options- A. ls
- B. cat
- C. file
- D. more
- E. None of the above Discuss
Correct Answer: file
- 8. In vi editor, forward search is performed using the command.
Options- A. :pat
- B. ?pat
- C. /pat
- D. All of the above
- E. None of the above Discuss
Correct Answer: /pat
- 9. Which of the following commands is used to update access and modification times of a file?
Options- A. grep
- B. wc
- C. touch
- D. cat
- E. None of the above Discuss
Correct Answer: touch
- 10. Which option will be used with touch command to change the access time?
Options- A. -a
- B. -b
- C. -t
- D. -h
- E. None of the above Discuss
Correct Answer: -a
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