EMC EMC Specialist E20-026 Questions & Answers

• Question 41:

  What is the mandatory Clause that must be included when using Window functions?

  A. OVER

  B. RANK

  C. PARTITION BY

  D. RANK BY

  Correct Answer: C

• Question 42:

  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

  Correct Answer: A

• Question 43:

  Which word or phrase completes the statement? Emphasis color is to standard color as _______ .

  A. Main message is to context

  B. Main message is to key findings

  C. Frequent item set is to item

  D. Pie chart is to proportions

  Correct Answer: A

• Question 44:

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

  A. XML data file

  B. Database table

  C. Webserver log

  D. News article

  Correct Answer: A

• Question 45:

  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 previously worked extensively with SQL and databases. Which query interface would you recommend?

  A. Hive

  B. Pig

  C. Howl

  D. HBase

  Correct Answer: A

• Question 46:

  Which of the following is an example of quasi-structured data?

  A. OLAP

  B. OLTP

  C. Customer record table

  D. Clickstream data

  Correct Answer: A

• Question 47:

  A Data Scientist is assigned to build a model from a reporting data warehouse. The warehouse contains data collected from many sources and transformed through a complex, multi-stage ETL process. What is a concern the data scientist should have about the data?

  A. It is too processed

  B. It is not structured

  C. It is not normalized

  D. It is too centralized

  Correct Answer: A

• Question 48:

  In the MapReduce framework, what is the purpose of the Reduce function?

  A. It aggregates the results of the Map function and generates processed output

  B. It distributes the input to multiple nodes for processing

  C. It writes the output of the Map function to storage

  D. It breaks the input into smaller components and distributes to other nodes in the cluster 26 / 55

  Correct Answer: A

• Question 49:

  You have run the association rules algorithm on your data set, and the two rules {banana, apple} => {grape} and {apple, orange}=> {grape} have been found to be relevant. What else must be true?

  A. {grape,apple,orange} must be a frequent itemset.

  B. {banana,apple,grape,orange} must be a frequent itemset.

  C. {grape} => {banana,apple} must be a relevant rule.

  D. {banana,apple} => {orange} must be a relevant rule.

  Correct Answer: A

• Question 50:

  When would you use a Wilcoxson Rank Sum test?

  A. When you cannot make an assumption about the distribution of the populations

  B. When the data can easily be sorted

  C. When the populations represent the sums of other values

  D. When the data cannot easily be sorted

  Correct Answer: A