Computer Science- Unix
Computer Science- Unix
1. Which symbol will be used with grep command to match the pattern pat at the beginning of a line?
- ^pat
- $pat
- pat$
- pat^
2. Which command is used to sort the lines of data in a file in reverse order
- sort
- sh
- st
- sort -r
4. Which command is used to copy all files having the string chap and any two characters after that to the progs directory?
- cp chap?? progs
- cp chap* progs
- cp chap[12] /progs/*.*
- cp chap?? /progs/*
5. Which command is used to change protection mode of files starting with the string emp and ending with 1,2, or 3?
- chmod u+x emp[l-3]
- chmod 777 emp*
- chmod u+r ??? emp
- chmod 222 emp?
7. Which of the following keys is used to replace a single character with new text?
- S
- s
- r
- C
9. Which command sends the word count of the file infile to the newfile.
- wc infile >newfile
- wc
newfile - wc infile - newfile
- wc infile | newfile
10. Which command is used to remove the read permission of the file 'note' from both the group and others?
- chmod go+r note
- chmod go+rw note
- chmod go-x note
- chmod go-r, 4-x note