Unix problems
- 1. Which of the following keys is used to delete the character beneath the cursor?
Options- A. x
- B. X
- C. dd
- D. D
- E. None of the above Discuss
Correct Answer: x
- 2. Which of are following internal commands is used in mail to forward mail to user in user-list?
Options- A. r user-list
- B. m user-list
- C. d user-list
- D. e user-list
- E. None of the above Discuss
Correct Answer: m user-list
- 3. Which of the following command is used to count just the number of lines contained in a file?
Options- A. wc -l
- B. wc -c
- C. wc -w
- D. wc -r
- E. None of the above Discuss
Correct Answer: wc -l
- 4. Which of the following special shell variables is used to process number of the current shell?
Options- A. $!
- B. $$
- C. $0
- D. $*
- E. None of the above Discuss
Correct Answer: $$
- 5. Which of the following signs is used to back up over typing errors in vi?
Options- A. @
- B. #
- C. $
- D. !
- E. None of the above Discuss
Correct Answer: #
- 6. Which command is used to move all files to the bin sub-directory of the parent directory?
Options- A. mv *.* /bin/
- B. mv * /bin/*
- C. mv * ../bin
- D. mv * ../bin *.*
- E. None of the above Discuss
Correct Answer: mv * ../bin
- 7. Which command allows you to view your file 24 lines at a time?
Options- A. more
- B. pg
- C. cat
- D. lp
- E. None of the above Discuss
Correct Answer: pg
- 8. You can append to a file instead of overwriting by using the
Options- A. > symbols
- B. >> symbols
- C. < symbols
- D. << symbols
- E. None of the above Discuss
Correct Answer: >> symbols
- 9. The UNIX file system stores a data in physical blocks of
Options- A. 1024 bytes
- B. 2048 bytes
- C. 512 bytes
- D. 256 bytes
- E. None of the above Discuss
Correct Answer: 512 bytes
- 10. Which of the following commands is used to have a two-way communication with any person who is currently logged in?
Options- A. mail
- B. mesg
- C. write
- D. grep
- E. None of the above Discuss
Correct Answer: write
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