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CSE :: Unix

  1. Which symbol will be used with grep command to match the pattern pat at the beginning of a line?

  2. A.
    ^pat
    B.
    $pat
    C.
    pat$
    D.
    pat^
    E.
    None of the above

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  3. Which command is used to sort the lines of data in a file in reverse order

  4. A.
    sort
    B.
    sh
    C.
    st
    D.
    sort -r
    E.
    None of the above

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  5. Which command is used to display the top of the file?

  6. A.
    cat
    B.
    head
    C.
    more
    D.
    grep
    E.
    None of the above

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  7. Which command is used to copy all files having the string chap and any two characters after that to the progs directory?

  8. A.
    cp chap?? progs
    B.
    cp chap* progs
    C.
    cp chap[12] /progs/*.*
    D.
    cp chap?? /progs/*
    E.
    None of the above

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  9. Which command is used to change protection mode of files starting with the string emp and ending with 1,2, or 3?

  10. A.
    chmod u+x emp[1-3]
    B.
    chmod 777 emp*
    C.
    chmod u+r ??? emp
    D.
    chmod 222 emp?
    E.
    None of the above

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  11. Which command is used to remove a directory?

  12. A.
    rd
    B.
    rmdir
    C.
    dldir
    D.
    rdir
    E.
    None of the above

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  13. Which of the following keys is used to replace a single character with new text?

  14. A.
    S
    B.
    s
    C.
    r
    D.
    C
    E.
    None of the above

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  15. Which command is used to extract specific columns from the file?

  16. A.
    cat
    B.
    cut
    C.
    grep
    D.
    paste
    E.
    None of the above

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  17. Which command sends the word count of the file infile to the newfile.

  18. A.
    wc infile >newfile
    B.
    wc <infile >newfile
    C.
    wc infile - newfile
    D.
    wc infile | newfile
    E.
    None of the above

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  19. Which command is used to remove the read permission of the file 'note' from both the group and others?

  20. A.
    chmod go+r note
    B.
    chmod go+rw note
    C.
    chmod go-x note
    D.
    chmod go-r note
    E.
    None of the above

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