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E20-065 Practice Exam Questions and Answers

Advanced Analytics Specialist Exam for Data Scientists

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Total Questions : 66

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Question # 1

Which is NOT a tenet of the Apache Pig Philosophy?

Options:

A.  

It must be easily commanded

B.  

Any type of data can be processed

C.  

Hadoop is required

D.  

Data should be processed quickly

Discussion 0
Question # 2

The naive Bayer classifier is trained over 1600 movie reviews and then tested over 400 reviews.

Here is the resulting confusion matrix:

190 (TP) 10(FN)

80 (FP) 120(TN)

What are the precision, recall, and the F1-score values?

Options:

A.  

Precision0.95; Recall: 0704; F1-score: 0.809

B.  

Precision 0.613, Recall: 0.95, F1-score: 0.745

C.  

Precision 0.704, Recall: 0.95; F1-score: 0.809

D.  

Precision 0.95; Recall: 0.613; F1-score: 0.745

Discussion 0
Question # 3

What is the maximum number of edges in an undirected graph of 10 nodes?

Options:

A.  

45

B.  

90

C.  

100

D.  

9

Discussion 0
Question # 4

What is a random subspace of features, as used by Random Forests?

Options:

A.  

A random subset of features that are chosen at each split in the decision tree

B.  

Filtration of data that does not meet a pre-defined weighting thrsehold

C.  

The creation of out-of-bag (OOB) data that is used to select features

D.  

Removal of highly correlated variables to randomize the features

Discussion 0
Question # 5

Which problem type is best suited for simulation?

Options:

A.  

One with a few. non-random input variables

B.  

One that has a closed-form solution

C.  

One with numerous, non-random Input-variables

D.  

One that compares "what-if scenarios

Discussion 0
Question # 6

What do lemmatization and stemming have in common?

Options:

A.  

Use WordNet

B.  

Remove common words in a natural language

C.  

Reduce the high dimensionality in text

D.  

Use a set of heuristics

Discussion 0
Question # 7

What runs more efficiently because of Apache Tez?

Options:

A.  

Pig and Hive

B.  

Hive and HBase

C.  

Yarn and Spark

D.  

All MapReduce jobs

Discussion 0
Question # 8

How is the relative value of a node visualized in a sunburst?

Options:

A.  

Color

B.  

Area

C.  

Gradient

D.  

Position

Discussion 0
Question # 9

What is an effective use of color in visualization?

Options:

A.  

Use self-explanatory colors so a legend is unnecessary

B.  

Maximize use of color to make a more lasting impression

C.  

Use high contrast colors such as red and blue

D.  

Minimize use of color except for emphasis

Discussion 0
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