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CSE MCQs :: R Programming MCQs

  1. What would be the output of the following code ?

     p - as.POSIXlt(x)
     names(unclass(p))
     p$wday
  2. A.
    1
    B.
    2
    C.
    3
    D.
    NULL

  3. What would be the output of the following code ?

    x - 1:4
     y - 6:9
     z - x + y
     z
  4. A.
    7 9 11 13
    B.
    7 9 11 13 14
    C.
    9 7 11 13
    D.
    NULL

  5. What would be the output of the following code ?

    x - 1:4
     y - 6:9
     x/y
  6. A.
    0.1666667 0.2857143 0.4444444
    B.
    0.1666667 0.2857143 0.3750000 0.4444444
    C.
    0.2857143 0.3750000 0.4444444
    D.
    All of the mentioned

  7. Which of the following argument denotes if the file has a header line ?
  8. A.
    header
    B.
    sep
    C.
    file
    D.
    All of the mentioned

  9. Point out the wrong statement :
  10. A.
    $ operator semantics are similar to that of [[
    B.
    The [[ operator can take an integer sequence if you want to extract a nested element of a list
    C.
    The $ operator can be used to extract multiple elements from a list
    D.
    All of the mentioned

  11. Columns can be arranged in descending order too by using the special ____ operator.
  12. A.
    asc()
    B.
    desc()
    C.
    descending()
    D.
    subset

  13. Connections to text files can be created with the ________ function.
  14. A.
    url
    B.
    gzfile
    C.
    bzfile
    D.
    file