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DA0-001 CompTIA Data+ Certification Exam Questions and Answers

Questions 4

What SQL command is used to delete an entire table from a database?

Options:

A.

DROP.

B.

MODIFY.

C.

DELETE.

D.

ALTER.

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Questions 5

What data obfuscation technique is designed to be reversible?

Options:

A.

Hashing

B.

Tokenization

C.

Masking

D.

Deletion

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Questions 6

Which one of the following is a measure of dispersion?

Options:

A.

Variance.

B.

Mode.

C.

Median.

D.

Mean.

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Questions 7

Amanda needs to create a dashboard that will draw information from many other data sources and present it to business leaders.

Which one of the following tools is least likely to meet her needs?

Options:

A.

QuickSight.

B.

Tableau.

C.

Power BI.

D.

SPSS Modeler.

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Questions 8

What R package makes it easy to work with dates?

Options:

A.

Lubridate.

B.

Datemath.

C.

Stringr.

D.

ggplot.

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Questions 9

Alex wants to use data from his corporate sale, CRM, and shipping systems to try and predict future sales.

Which of the following systems is the most appropriate?

Choose the best answer.

Options:

A.

Data mart.

B.

OLAP.

C.

Data Warehouse.

D.

OLTP.

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Questions 10

Taylor wants to investigate how manufacturing, marketing, and sales expenditures impact overall profitability for her company.

Which of the following systems is the most appropriate?

Options:

A.

OLTP.

B.

OLAP.

C.

Data warehouse.

D.

Data mart.

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Questions 11

What term is used to describe an interactive visualization that encourages people to explore data dynamically?

Options:

A.

Data set.

B.

Dashboard.

C.

Data point.

D.

Graphical representation.

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Questions 12

Jhon is working on an ELT process that sources data from six different source systems.

Looking at the source data, he finds that data about the sample people exists in two of six systems.

What does he have to make sure he checks for in his ELT process?

Choose the best answer.

Options:

A.

Duplicate Data.

B.

Redundant Data.

C.

Invalid Data.

D.

Missing Data.

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Questions 13

Five dogs have the following heights in millimeters:

300, 430, 170, 470, 600

Which of the following is the mean height for the five dogs?

Options:

A.

405mm

B.

493mm

C.

504mm

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Questions 14

A web developer wants to ensure that malicious users can't type SQL statements when they asked for input, like their username/userid.

Which of the following query optimization techniques would effectively prevent SQL Injection attacks?

Options:

A.

Indexing.

B.

Subset of records.

C.

Temporary table in the query set.

D.

Parametrization.

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Questions 15

Andrew conducts a study and wants to capture eye color.

What kind of data is eye color?

Choose the best response.

Options:

A.

Discrete.

B.

Categorical.

C.

Continuous.

D.

Alphanumeric.

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Questions 16

Which of the following is the correct data type for text?

Options:

A.

Boolean

B.

String

C.

Integer

D.

Float

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Questions 17

The category PII (Personally identifiable information) includes all of the following, except_________.

Options:

A.

Trade secrets.

B.

Medical records.

C.

Browsing habits.

D.

Financial information.

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Questions 18

What type of data is best suited for display using a tree map?

Options:

A.

Time series data

B.

Numeric data

C.

Nested data

D.

Text data

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Questions 19

Emma is working in a data warehouse and finds a finance fact table links to an organization dimension, which in turn links to a currency dimension that not linked to the fact table.

What type of design pattern is the data warehouse using?

Options:

A.

Star.

B.

Sun.

C.

Snowflake.

D.

Comet.

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Questions 20

A data analyst needs to present the results of an online marketing campaign to the marketing manager. The manager wants to see the most important KPIs and measure the return on marketing investment. Which of the following should the data analyst use to BEST communicate this information to the manager?

Options:

A.

A real-time monitor that allows the manager to view performance the day the campaign was launched

B.

A sell-service dashboard that allows the manager to look at the company's annual budget performance

C.

A spreadsheet of the raw data from all marketing campaigns and channels

D.

A summary with statistics, conclusions, and recommendations from the data analyst

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Exam Code: DA0-001
Exam Name: CompTIA Data+ Certification Exam
Last Update: Aug 18, 2022
Questions: 139

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