Q.1
The four most frequently used types of data objects in R are vectors, matrices, data frames and ________
  • a) Function
  • b) Lists
  • c) Packages
  • d) Interfaces
Q.2
A __________ is a set of elements appearing in rows and columns where the elements are of the same mode whether they are logical, numeric (integer or double), complex or character.
  • a) Vector
  • b) Matrix
  • c) Lists
  • d) Data frames
Q.3
What is the simplest way of creating the vector?
  • a) C function
  • b) Create
  • c) Destroy
  • d) Invalid
Q.4
Which function replicates elements of vectors?
  • a) C
  • b) Rep
  • c) Crep
  • d) Grep
Q.5
The ________ function creates a regular sequence of values to form a vector.
  • a) sequel
  • b) Rep
  • c) seq
  • d) Grep
Q.6
Which function is used to enter in data at the terminal?
  • a) Scanned
  • b) Scnn
  • c) Scan
  • d) Sccn
Q.7
Computation with vectors is achieved using an element-by-element operation for avoiding _________
  • a) Loops
  • b) Functions
  • c) Packages
  • d) Interfaces
Q.8
To bind a row onto an already existing matrix, the ______ function can be used.
  • a) Rbind
  • b) Sbnd
  • c) Gbind
  • d) Sbind
Q.9
Which of the following is a 3-dimensional dataset?
  • a) Eris
  • b) Iris
  • c) Toris
  • d) Iris
Q.10
Which dimension corresponds to the explanatory variables collected for each species?
  • a) First
  • b) Second
  • c) Third
  • d) Fifth
Q.11
Using the ________ vector, we create a species factor and bind it to the columns of iris.df.
  • a) snames
  • b) rnames
  • c) jnames
  • d) fnames
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