Data Science

Graphics Devices

Question 1
Marks : +2 | -2
Pass Ratio : 100%
Point out the correct statement.
Vector formats are good for line drawings and plots with solid colors using a modest number of points
Vector formats are good for plots with a large number of points, natural scenes or web based plots
The default graphics device is always the screen device
All of the mentioned
Explanation:
Bitmap formats are good for plots with a large number of points, natural scenes or web based plots.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
dev.copy2pdf specifically copy a plot to a PDF file.
True
False
Explanation:
Copying a plot is not an exact operation, so the result may not be identical to the original.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is used to change active graphic device?
dev.set
dev.int
dev.win
all of the mentioned
Explanation:
You can change the active graphics device with dev.set(<integer>) where <integer> is the number associated with the graphics device you want to switch to.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
Which of the following system most often don’t have postscript viewer?
Windows
Linux
Mac
All of the mentioned
Explanation:
postscript is older format but it resizes well.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
Every open graphics device is assigned an integer greater than 2.
True
False
Explanation:
Every open graphics device is assigned an integer greater than equal to 2.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is the second goal of PCA?
data compression
statistical analysis
data dredging
all of the mentioned
Explanation:
The principal components are equal to the right singular values if you first scale the variables.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is an example of graphics device?
PDF
SVG
JPEG
All of the mentioned
Explanation:
When the plot() function is invoked, R sends the data corresponding to the plot over, and the graphics device generates the plot.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
Which of the following file format is graphic device only for windows?
pdf
svg
win.metafile
all of the mentioned
Explanation:
Exporting graphics to a Windows MetaFile can be achieved via the win.metafile.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is a bitmap file type?
tiff
svg
pdf
none of the mentioned
Explanation:
TIFF is a computer file format for storing raster graphics images.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
Point out the wrong statement.
File devices are useful for creating plots that can be included in other documents or sent to other people
Plots must be created on a graphics device
For file devices, there are vector and bitmap formats
None of the mentioned
Explanation:
For file devices, there are vector and bitmap formats.