Data Science

Graphics Devices

Question 1
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 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%
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%
Point out the wrong statement.
For quick visualizations and exploratory analysis, usually you want to use the screen device
Functions like xyplot in lattice will not default to sending a plot to the screen device
Not all graphics devices are available on all platforms
None of the mentioned
Explanation:
window function cannot be used on Mac.
Question 6
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 7
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 8
Marks : +2 | -2
Pass Ratio : 100%
Which of the following is alternative technique toprincipal component analysis?
Factor analysis
Independent components analysis
Latent semantic analysis
All of the mentioned
Explanation:
PC’s may mix real patterns.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
Point out the correct statement.
On Mac, the screen device is launched with quartz
On Windows, the screen device is launched with wind
On Unix, the screen device is launched with x12
All of the mentioned
Explanation:
On Windows, the screen device is launched with window function.
Question 10
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.