Data Science

Graphics Devices

Question 1
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 2
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 3
Marks : +2 | -2
Pass Ratio : 100%
There are mainly three types of file devices.
True
False
Explanation:
There are mainly basic types of file devices-vector and bitmap.
Question 4
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 5
Marks : +2 | -2
Pass Ratio : 100%
Which of the following will copy the plot from one device to another?
dev.copy
dev.copypdf
dev.device
all of the mentioned
Explanation:
Copying a plot to another device can be useful because some plots require a lot of code and it can be a pain to type all that in again for a different device.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
Which of the following function displays currently active graphics device?
dev.present
dev.cur
pre.cur
all of the mentioned
Explanation:
You can change the active graphics device with dev.set.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
The most familiar place for a plot to be “sent” is screen device.
True
False
Explanation:
On Linux, the screen device is launched with x11 function.
Question 8
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 9
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.
Question 10
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.