DEA-7TT2試験無料問題集（233題）「EMC Associate - Data Science and Big Data Analytics v2 認定」

出題：1

What is the optimal usage scenario for the Hadoop Distributed File System?
Response:

A. Small files and high throughput

B. Small files and low latency

C. Large files and low latency

D. Large files and high throughput

正解：D 解答を投票する

出題：2

Which two analytical methods can be used for dealing with categorical variables with a large number of levels?
Response:

A. Naive Bayesian and Linear Regression

B. Logistic Regression and ARMA

C. Linear Regression and Association Rules

D. Naive Bayesian and Decision Tree

正解：D 解答を投票する

出題：3

Which activity is performed in the Operationalize phase of the Data Analytics Lifecycle?
Response:

A. Try different analytical techniques

B. Define the process to maintain the model

C. Try different variables

D. Transform existing variables

正解：A 解答を投票する

出題：4

You are provided with the following list. Which window function is missing?
cume_dist()
dense_rank()
rank()
percent_rank()
first_value()
last_value()
lag()
lead()
ntile()
Response:

A. median()

B. cumulative_sum()

C. row_preceding()

D. row_number()

正解：D 解答を投票する

出題：5

When is a Wilcoxon Rank-Sum test used?
Response:

A. When the data can be easily sorted

B. When the data cannot be easily sorted

C. When an assumption about the distribution of the populations cannot be made

D. When the populations represent the sums of other values

正解：C 解答を投票する

出題：6

There are three criterions for big data analytics projects which include:
- Decision speed
- Analysis flexibility
What is the additional criteria?
Response:

A. Quality

B. Structure

C. Throughput

D. Security

正解：C 解答を投票する

出題：7

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

A. Webserver log

B. News article

C. XML data file

D. Database table

正解：A 解答を投票する

出題：8

Which component of a final presentation focuses on how to deploy the model?
Response:

A. Approach

B. Recommendations

C. Project goals

D. Executive summary

正解：B 解答を投票する

出題：9

Refer to the exhibit.

After analyzing a dataset, you report findings to your team:
1. Variables A and C are significantly and positively impacting the dependent variable.
2. Variable B is significantly and negatively impacting the dependent variable.
3. Variable D is not significantly impacting the dependent variable.
After seeing your findings, the majority of your team agreed that variable B should be positively impacting the dependent variable.
What is a possible reason the coefficient for variable B was negative and not positive?
Response:

A. The information gain from variable B is already provided by another variable

B. Variable B needs a logarithmic transformation due to its relationship to the dependent variable

C. Variable B is interacting with another variable due to correlated inputs

D. Variable B needs a quadratic transformation due to its relationship to the dependent variable

正解：C 解答を投票する

出題：10

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

A. Centroid positioning and entropy of each record in each cluster

B. Center of each discovered cluster and mapping of each record to a cluster

C. Intercept and coefficients for each input variable in the dataset

D. Two dimensional representation of the data and the clusters

正解：B 解答を投票する

出題：11

What describes a true property of Logistic Regression method?
Response:

A. It works well with discrete variables that have many distinct values.

B. It is robust with redundant variables and correlated variables.

C. It handles missing values well.

D. It works well with variables that affect the outcome in a discontinuous way.

正解：B 解答を投票する

出題：12

When creating a project sponsor presentation, what is the main objective?
Response:

A. Show that you met the project goals

B. Show how well the model will meet the SLA (service level agreement)

C. Show how you met the project goals

D. Clearly describe the methods and techniques used

正解：A 解答を投票する

出題：13

In addition to quantitative and technical skills, what is a key aspect of the profile of a data scientist?
Response:

A. Proficient in Microsoft Project and Excel

B. Curious and creative

C. Accounting and regulatory skills

D. Project management and administrative skills

正解：B 解答を投票する

DEA-7TT2試験無料問題集「EMC Associate - Data Science and Big Data Analytics v2 認定」