E20-065 Exam Passing Guarantee 2018
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<strong>E20</strong>-<strong>065</strong><br />
Advanced Analytics Specialist <strong>Exam</strong> for Data Scientists<br />
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Questions and Answers in PDF Format.<br />
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Question: 1<br />
The naive Bayer classifier is trained over 1600 movie reviews and then tested over 400 reviews.<br />
Here is the resulting confusion matrix:<br />
190 (TP) 10(FN)<br />
80 (FP) 120(TN)<br />
What are the precision, recall, and the F1-score values?<br />
A. Precision0.95; Recall: 0704; F1-score: 0.809<br />
B. Precision 0.613, Recall: 0.95, F1-score: 0.745<br />
C. Precision 0.704, Recall: 0.95; F1-score: 0.809<br />
D. Precision 0.95; Recall: 0.613; F1-score: 0.745<br />
Question: 2<br />
Answer: C<br />
What is a property of a good color model for ordinal data?<br />
A. Uses a rainbow-like color map for distinction of categories<br />
B. Uses a rainbow-like color map for ease of display and printing<br />
C. Uses perceptually ordinal colors with just-noticeable increments<br />
D. Uses perceptually ordinal colors with linear, perceptual increments<br />
Question: 3<br />
Answer: D<br />
What is an effective use of color in visualization?<br />
A. Use self-explanatory colors so a legend is unnecessary<br />
B. Maximize use of color to make a more lasting impression<br />
C. Use high contrast colors such as red and blue<br />
D. Minimize use of color except for emphasis<br />
Question: 4<br />
Answer: C<br />
Which library is NOT part of the Apache Spark distribution?<br />
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A. MLib<br />
B. NLTK<br />
C. GraphX<br />
D. Spark SQL<br />
Answer: B<br />
Question: 5<br />
What is the maximum number of edges in an undirected graph of 10 nodes?<br />
A. 45<br />
B. 90<br />
C. 100<br />
D. 9<br />
Question: 6<br />
Answer: A<br />
What is a typical use of a UDF in Pig?<br />
A. Creating functionality outside of what is provided by the built-in functions<br />
B. Providing Functional access to user-defined data in HDFS<br />
C. Providing advanced analytics to Hadoop<br />
D. Providing an interface from Pig to Microsoft Excel for easier data manipulation<br />
Question: 7<br />
Answer: A<br />
In multinomial logistic regression, what is used to calculate the probability of outcome occurring?<br />
A. Logistic function applied to a linear combination of the input and outcome variables<br />
B. Linear regression applied to a combination of input variables<br />
C. Linear regression applied to a combination of input and outcome variables<br />
D. Logistic function applied to a linear combination of the input variables<br />
Answer: B<br />
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Question: 8<br />
What is a characteristic of spark?<br />
A. Unable to run map -> reduce execution plans<br />
B. Supports applications written in Python, Java, and Scala<br />
C. Less efficient processing small files than Hadoop MapReduce<br />
D. Supports workflows that can return to previous work steps<br />
Answer: B<br />
Question: 9<br />
In a connected, undirected graph of 5 nodes with 10 edges, how many more edges need to be added to<br />
make the clustering coefficient of every node equal 1?<br />
A. 0<br />
B. 5<br />
C. 10<br />
D. 15<br />
Question: 10<br />
Answer: A<br />
Which metric would be most helpful in identifying a node that may cause network disruption if the node<br />
were removed?<br />
A. Degree<br />
B. Closeness<br />
C. Betweenness<br />
D. PageRank<br />
Answer: A<br />
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