EMC E20-026 Online Practice Questions and Exam Preparation

EMC E20-026 Online Questions & Answers

• Question 111:

  What is the purpose of the process step "parsing" in text analysis?

  A. imposes a structure on the unstructured/semi-structured text for downstream analysis
  B. performs the search and/or retrieval in finding a specific topic or an entity in a document
  C. executes the clustering and classification to organize the contents
  D. computes the TF-IDF values for all keywords and indices
  A. imposes a structure on the unstructured/semi-structured text for downstream analysis

• Question 112:

  Refer to the exhibit.

  Click on the calculator icon in the upper left corner. An analyst is searching a corpus of documents for the topic "solid state disk". In the Exhibit, Table A provides the inverse document frequency for each term across the corpus. Table B

  provides each term's frequency in four documents selected from corpus. Which of the four documents is most relevant to the analyst's search?

  

  A. Document B
  B. Document A
  C. Document C
  D. Document D
  A. Document B

• Question 113:

  A data scientist plans to classify the sentiment polarity of 10, 000 product reviews collected from the Internet. What is the most appropriate model to use? Suppose labeled training data is available.

  A. Na.ve Bayesian classifier
  B. Linear regression
  C. Logistic regression
  D. K-means clustering
  A. Na.ve Bayesian classifier

• Question 114:

  Review the following code:

  SELECT pn, vn, sum(prc*qty)

  FROM sale

  GROUP BY CUBE(pn, vn)

  ORDER BY 1, 2, 3;

  Which combination of subtotals do you expect to be returned by the query?

  A. (pn,vn)
  B. ( (pn,vn),(pn) )
  C. ( (pn,vn),(pn),(vn) )
  D. ( (pn,vn),(pn),(vn),( ) )
  D. ( (pn,vn),(pn),(vn),( ) )

• Question 115:

  Which data asset is an example of semi-structured data?

  A. XML data file
  B. Database table
  C. Webserver log
  D. News article
  A. XML data file

• Question 116:

  Your colleague, who is new to Hadoop, approaches you with a question. They want to know how best to access their data. This colleague has a strong background in data flow languages and programming. Which query interface would you recommend?

  A. Pig
  B. Hive
  C. Howl
  D. HBase
  A. Pig

• Question 117:

  In which phase of the data analytics lifecycle do Data Scientists spend the most time in a project?

  A. Discovery
  B. Data Preparation
  C. Model Building
  D. Communicate Results
  B. Data Preparation

• Question 118:

  Which data asset is an example of quasi-structured data?

  A. Webserver log
  B. XML data file
  C. Database table
  D. News article
  A. Webserver log

• Question 119:

  The web analytics team uses Hadoop to process access logs. They now want to correlate this data with structured user data residing in their massively parallel database. Which tool should they use to export the structured data from Hadoop?

  A. Sqoop
  B. Pig
  C. Chukwa
  D. Scribe
  A. Sqoop

• Question 120:

  Which type of numeric value does a logistic regression model estimate?

  A. Probability
  B. A p-value
  C. Any integer
  D. Any real number
  A. Probability