EMC EMC Certifications E20-065 Questions & Answers

• Question 31:

  What do lemmatization and stemming have in common?

  A. Use WordNet

  B. Remove common words in a natural language

  C. Reduce the high dimensionality in text

  D. Use a set of heuristics

  Correct Answer: C

• Question 32:

  You conduct a TFIDF analysis on 3 documents containing raw text and derive TFIDF ("data", document y) = 1.908. You know that the term "data" only appears in document 2.

  What is the TF of "data" in document 2?

  A. 2 based on the following reasoning: TFIDF = TF1DF = 1 908 You then know that IDF will equal LOG (32)=0.954 Therefore, TFIDF=TF*0.954 = 1.908 TF will then round to 2

  B. 4 based on the following reasoning: TFIDF = TF1DF = 1.908 You then know that IDF will equal LOG (3/1 )=0.477 Therefore, TFIDF=TF'0 477 = 1.908 TF will then round to 4

  C. 6 based on the following reasoning: TFIDF = TF1DF = 1.908 You then know that IDF will equal 3/1=3 Therefore, TFIDF=TF/3 = 1.908 TF will then round to 6

  D. 11 based on the following reasoning: TFIDF = TF1DF = 1908 You then know that IDF will equal LOG(3/2)=0.176 Therefore, TFIDF=TF"0.176 = 1.908 TF will then round to 11

  Correct Answer: B

• Question 33:

  What is a typical use of a UDF in Pig?

  A. Creating functionality outside of what is provided by the built-in functions

  B. Providing Functional access to user-defined data in HDFS

  C. Providing advanced analytics to Hadoop

  D. Providing an interface from Pig to Microsoft Excel for easier data manipulation

  Correct Answer: A

• Question 34:

  You develop a Python script "logisticpy" to evaluate the logistic function denoted as f(y) for a given value y that includes the following Pig code:

  Register 'logistic.py' using jython as udf;

  z = FOREACH y GENERATE $0, udf.logistic ($0);

  DUMP z;

  What is the expected output when the Pig code is executed?

  A. 0

  B. Jython is not a supported language

  C. Value of f(y) for ally

  D. Tuples (y, f(y))

  Correct Answer: D

• Question 35:

  What is the maximum degree of a node in an undirected graph with 50 nodes'?

  A. 49

  B. 50

  C. 1250

  D. 2500

  Correct Answer: A

• Question 36:

  Which scenario is a proper use case for multinomial logistic regression?

  A. A marketing firm wants to estimate the personal income of a group of potential customers. Using inputs such as age, education, marital status, and credit card expenditures, a data scientist is building a model that will estimate a person's income

  B. A logistic distribution company wants to minimize the distance traveled by its delivery trucks. A data scientist is building a model to determine the optimal route for each of tis trucks

  C. To improve the initial routing of a loan application, a financial institution plans to classify a loan application as Approve, Reject, or Possibly_Approve. Based on the company's historical loan application data, a data scientist is building a model to assign one of these three outcomes to each submitted application.

  D. A manufacturer plans to determine the optimal number of workers to employ in an assembly line process. Utilizing the observed distributions of the task durations of each process step, a data scientist is building a model to mimic the interactions and dependencies between each stage in the manufacturing process.

  Correct Answer: C

• Question 37:

  In a connected, undirected graph of 5 nodes with 10 edges, how many more edges need to be added to make the clustering coefficient of every node equal 1 ?

  A. 0

  B. 5

  C. 10

  D. 15

  Correct Answer: A

• Question 38:

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

  A. 45

  B. 90

  C. 100

  D. 9

  Correct Answer: A

• Question 39:

  What is an intended application of the MapReduce framework?

  A. Processing can be broken into smaller pieces

  B. Processing a large number of small files

  C. Processing in real time is required

  D. Processing a small subset of data

  Correct Answer: A

• Question 40:

  What is NOT a category of a NoSQL data store?

  A. Columnar

  B. Document

  C. Key/Value

  D. Flat File

  Correct Answer: D