# Data Visualization Using R MCQs Solution | TCS Fresco Play | Fresco Play | TCS

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1. graphics,ggplot2 packages qualify for ___

Visualization Packages

2. Scatterplot Matrix is an example of __ type of visualization.

Multivariate

3. Which command in R, lists the available Datasets in R

data()

4. Title of the plot is provided by the variable

main

5. In the plot, to add label to the horizontal axis the variable to be configured is

xlab()

6. Histograms , Density Plots are examples of which type of visualization?

Univariate

7. How can we find the different parameters available ?

par()

8. Histogram is mainly used as visual representation of _

distribution

9. Which parameter in R helps to decide the number of bins which we want to manually override?

breaks

10. Which parameter decides the line type & plot symbol respectively?

Ich & pty

12. In case of the plot, which parameter decides whether the plot should be line or points or both?

13. The vertical axis label is provided by the parameter

ylab

14. To reset the grid to normal layout, after displaying multiple charts in single view could be obtained by

par(mfcol(1,1))

15. Which parameter could be used to convert stacked barplot into grouped bar plot?

beside=TRUE

16. If one would like to visualize 6 graphs in single view with graphs scaling in row wise fashion (2 rows)

par(mfrow=c(2,3))

17. Which parameter is helpful to swap the chart from x-axis to y-axis?

horiz=true

18. Barchart represents visual display of of category of categorical variable

frequency

19. Customizing the way your graphs could be arranged can be configured using _

layout()

20. Which argument helps in changing the size of plotting characters?

SIZE

21. Stratified boxplots are useful for examining the relationship between a categorical variable and a numeric variable.

True

22. col.main=4, will change size of the font ?

False

23. Which plot would be applicable for summarizing the value of numeric variable

Boxplot

24. Changing the font size of the axis labels could be accomplished using the following font

25. Which parameter removed the X & Y axis

axes=F

26. If in the Notched boxplot does not overlap, it means___

Medians do not overlap

27. Which command allows to place the text within the graph?

text

28. Which text feature allows the text to written along the margin of the graph?

mtext

29. Which of this is limitation of lattice plots?

All options

30. Lattice package supports the generation of trellis graphs (graphs that display a variable or the relationship between variables, conditioned on one or more other variables)

True

31. In lattice, ~x|A refers to

display numeric variable x for each level of factor A

32. In lattice,y~x | A*B refers to

Display the relationship between numeric variables y and x separately for every combination of factor A and B levels

33. Using ggplot2 for multifaceted diagram, the deciding variable on the number of rows or columns is

.(decimal)

34. ggplot2 requires the data to be in

dateframe format

35. Aesthetics in ggplot2 refers to

size,shape,color

36. The grey zone around the geom("smooth") line refers to

95% confidence

37. In multifaceted plot, how many columns will be formed when facets is mentioned as facets=.~drv

depends on drv

38. Geometric (geom) in ggplot2 refers to

points,lines

39. In multifaceted plot, how many columns will be formed when facets is mentioned as facets=drv~.

always 1 column

40. Factors represent the subset of the data and they should be properly labelled

True

41. In multifaceted plot, how many rows will be formed when facets is mentioned as facets=.~drv

always 1 row

42. What does gg in ggplot2 refer to

Grammar of Graphics

43. In multifaceted plot, how many rows will be formed when facets is mentioned as facets=drv~.

depends on drv

44. ggplot2 allows to add features layer by layer

True

45. In ggplot2, which function decides the object printing ____

geom.point()

46. The functions which assist in labelling of the functions is _

all options

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