Free Master of Data Science Research & Data Analysis Questions and Answers

Question 1

Which of the following is a graphic device example?

Accepted Answer

All of the above

Answer

JPEG

Answer

SVG

Answer

PDF

Question 2

Which of the following file types is exclusive to Windows graphic devices?

Accepted Answer

win.metafile

Answer

svg

Answer

pdf

Answer

All of the above

Question 3

Identify the incorrect statement.

Accepted Answer

Functions like xyplot in lattice will not default to sending a plot to the screen device

Answer

Not all graphics devices are available on all platforms

Answer

For quick visualizations and exploratory analysis, usually you want to use the screen device

Answer

None of the above

Question 4

The second objective of PCA is which of the following?

Accepted Answer

data compression

Answer

data dredging

Answer

statistical analysis

Answer

All of the above

Question 5

Which of the subsequent annotation features adds or modifies text?

Accepted Answer

All of the above

Answer

lines

Answer

word

Answer

graph

Question 6

Which of the subsequent packages does the lattice plotting system implement?

Accepted Answer

grid

Answer

graphics

Answer

grDevices

Answer

All of the above

Question 7

Identify the incorrect statement.

Accepted Answer

Plot are created with multiple functions only

Answer

Annotation in plot is not especially intuitive

Answer

Plots are created with both single and multiple function calls

Answer

None of the above

Question 8

Which of the following parameters determines the type of line, including dashed and dotted lines?

Accepted Answer

lwd

Answer

pch

Answer

lty

Answer

All of the above

Question 9

Identify the accurate statement.

Accepted Answer

All of the above

Answer

Hierarchical clustering is also called HCA

Answer

In general, the merges and splits are determined in a greedy manner

Answer

The choice of an appropriate metric will influence the shape of the clusters

Question 10

Which of the following results from hierarchical clustering in the end?

Accepted Answer

tree showing how close things are to each other

Answer

assignment of each point to clusters

Answer

final estimate of cluster centroids

Answer

All of the above