DEA-7TT2 by EMC Actual Free Exam Q&As

Question 1

What are challenges presented by Big Data?
Response:

A. New technologies, tools and regulatory rules only B. New technologies, and tools only C. New technologies, tools, business processes, and regulatory rules D. New technologies, tools, and business processes only

Discussion 0

Correct Answer: C Vote an answer

Question 2

In association rules, given X -> Y, what is confidence?
Response:

A. Percentage of transactions with X that also contain Y B. How many times more often X and Y occur together than expected if they were statistically independent, expressed as a ratio C. Percentage of transactions that contain the itemset D. Difference in the probability of X and Y appearing together compared with expectations if they were statistically independent

Discussion 0

Correct Answer: A Vote an answer

Question 3

Your organization has a website where visitors randomly receive one of two coupons. It is also possible that visitors to the website will not receive a coupon.
You have been asked to determine if offering a coupon to visitors to your website has any impact on their purchase decision. Which analysis method should you use?
Response:

A. Student T-test B. One-way ANOVA C. Association rules D. K-means clustering

Discussion 0

Correct Answer: B Vote an answer

Question 4

You are using the Apriori algorithm to determine the likelihood that a person who owns a home has a good credit score. You have determined that the confidence for the rules used in the algorithm is > 75%. You calculate lift = 1.011 for the rule, "People with good credit are homeowners".
What can you determine from the lift calculation?
Response:

A. Leverage of the rules is low B. The rule is true C. The rule is coincidental D. Support for the association is low

Discussion 0

Correct Answer: C Vote an answer

Question 5

Which characteristic applies mainly to Data Science as opposed to Business Intelligence?
Response:

A. Data dashboards B. Focus on structured data C. Robust reporting D. Advanced analytical methods

Discussion 0

Correct Answer: D Vote an answer

Question 6

You submit a MapReduce job to a Hadoop cluster. Although the job was successfully submitted, you notice that it is not completing. What should be done?
Response:

A. Ensure that the JobTracker is running B. Ensure that a DataNode is running C. Ensure that the NameNode is running D. Ensure that the TaskTracker is running

Discussion 0

Correct Answer: D Vote an answer

Question 7

A business colleague who is new to Hadoop approaches you with a question. The colleague wants to know the best approach to access their dat a. The colleague has previously worked extensively with SQL and databases.
Which query interface should be recommended?
Response:

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

Discussion 0

Correct Answer: C Vote an answer

Question 8

Which word or phrase completes the statement? Theater actor is to "Artistic and Expressive" as Data Scientist is to __________ Response:

A. "Logical and Steadfast" B. "Introverted and Technical" C. "Independent and Intelligent" D. "Communicative and Collaborative"

Discussion 0

Correct Answer: D Vote an answer

Question 9

What is the output of the K-means clustering algorithm?
Response:

A. Intercept and coefficients for each input variable in the dataset B. Center of each discovered cluster and mapping of each record to a cluster C. Centroid positioning and entropy of each record in each cluster D. Two dimensional representation of the data and the clusters

Discussion 0

Correct Answer: B Vote an answer

EMC Associate - Data Science and Big Data Analytics v2 - DEA-7TT2 Exam Practice Test