[Q118-Q133] DEA-7TT2 Practice Test Give You First Time Success with 100% Money Back Guarantee! : Top Exam Collection : http://blog.topexamcollection.com

NEW QUESTION 118
When creating a presentation for a technical audience, what is the main objective?
Response:

Show that you met the project goals

Show how you met the project goals

Show if the model will meet the SLA

Show the technique to be used in the production environment

NEW QUESTION 119

Based on the graphic, what should be done to begin addressing chart junk?
Response:

Remove the vertical gridlines

Remove the legend

Reduce the font size in the axis

NEW QUESTION 120
What are challenges presented by Big Data?
Response:

New technologies, tools and regulatory rules only

New technologies, tools, business processes, and regulatory rules

New technologies, and tools only

New technologies, tools, and business processes only

NEW QUESTION 121
Which term is used to describe separating a database into separate parts that can be processed in parallel?
Response:

Deduplication

Replication

Sharding

Reconstituting

NEW QUESTION 122
Refer to the exhibit.

You are building a decision tree. In this exhibit, four variables are listed with their respective values of info-gain. Based on this information, on which attribute would you expect the next split to be in the decision tree?
Response:

Credit Score

Age

Income

Gender

NEW QUESTION 123
Which word or phrase completes the statement? Business Intelligence is to monitoring trends as Data Science is to ________ trends.
Response:

Predicting

Discarding

Driving

Optimizing

NEW QUESTION 124
What does a leaf node represent in a decision tree?
Response:

Root of the decision tree

Decision point on a variable

Outcome of a test on a variable

Assigned class label

NEW QUESTION 125
Consider a database with 4 transactions:
Transaction 1: {cheese, bread, milk}
Transaction 2: {soda, bread, milk}
Transaction 3: {cheese, bread}
Transaction 4: {cheese, soda, juice}
You decide to run the association rules algorithm where minimum support is 50%. Which rule has a confidence at least 50%?
Response:

{cheese} => {bread}

{juice} => {cheese}

{milk} => {soda}

{soda} => {milk}

NEW QUESTION 126
You have numeric data for more than 500 observations. You are interested in identifying linear relationships among these numeric variables. Which R function should you employ to get the best visualization?
Response:

rug()

lm()

pairs()

plot(density())

NEW QUESTION 127
How is HDFS defined?
Response:

Large “web table” capable of holding millions of rows and millions of columns

Row-column oriented datastore supporting redundancy and high availability

Reliable, redundant distributed file system

Reliable file system stored on a single extensible storage platform

NEW QUESTION 128
Which word or phrase completes the statement? A spreadsheet is to a data island as a centralized database for reporting is to a __________?
Response:

Data Warehouse

Data Repository

Analytic Sandbox

Data Mart

NEW QUESTION 129
What is the primary function of the NameNode in Hadoop?
Response:

Keeps track of which MapReduce jobs have been assigned to each TaskTracker

Monitors the state of each JobTracker node and signals an event if unavailable

Runs some number of mapping tasks against its assigned data

Acts as a regulator/resolver among clients and DataNodes

NEW QUESTION 130
When would you use a Wilcoxson Rank Sum test?
Response:

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

When the data can easily be sorted

When the populations represent the sums of other values

When the data cannot easily be sorted

NEW QUESTION 131
What is a core deliverable at the end of the analytic project?
Response:

An implemented database design

A whitepaper describing the project and the implementation

A presentation for project sponsors

The training materials

NEW QUESTION 132
Consider these itemsets:
(hat, scarf, coat)
(hat, scarf, coat, gloves)
(hat, scarf, gloves)
(hat, gloves)
(scarf, coat, gloves)
What is the confidence of the rule (hat, scarf) => gloves?
Response:

66%

40%

50%

60%

NEW QUESTION 133
What are considerations in a data science and Big Data analytics project?
Response:

Ignoring executive stakeholders and business users

Applying the latest technologies to demonstrate technical skills

Analysis flexibility and decision making

Building data silos and bypassing data privacy rules