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DA0-001 Practice Questions

CompTIA Data+ Certification Exam

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Total Questions : 396

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Question # 41

Which of the following data types best describe 4Ac1? (Select two).

Options:

A.  

Alphanumeric

B.  

Symbolic

C.  

Numeric

D.  

Float

E.  

Boolean

F.  

String

Discussion 0
Question # 42

‘Which of the following is the BEST reason to use database views instead of tables?

Options:

A.  

Views reduce the need for repetitive, complex data joins.

B.  

Views allow for the storage of temporary data. whereas tables do not.

C.  

Views allow for the joining of multiple data sources, whereas tables do not.

D.  

Views can be used to restrict sensitive information.

Discussion 0
Question # 43

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

Discussion 0
Question # 44

A database consists of one fact table that is composed of multiple dimensions. Depending on the dimension, each one can be represented by a denormalized table or multiple normalized tables. This structure is an example of a:

Options:

A.  

transactional schema.

B.  

star schema.

C.  

non-relational schema.

D.  

snowflake schema.

Discussion 0
Question # 45

Which of the following best describes a difference between JSON and XML?

Options:

A.  

JSON is quicker to read and write.

B.  

JSON has to use an end tag.

C.  

JSON strings are longer

D.  

JSON is much more difficult to parse.

Discussion 0
Question # 46

Given the following data table:

Question # 46

Which of the following are appropriate reasons to undertake data cleansing? (Select two).

Options:

A.  

Non-parametric data

B.  

Missing data

C.  

Duplicate data

D.  

Invalid data

E.  

Redundant data

F.  

Normalized data

Discussion 0
Question # 47

The current date is July 14, 2020. A data analyst has been asked to create a report that shows the company's year-over-year Q2 2020 sales. Which of the following reports should the analyst compare?

Options:

A.  

Q2 2020 and Q4 2019

B.  

YTD 2020 and YTD 2019

C.  

Q2 2020 and Q2 2019

D.  

Q2 2020 and Q2 2021

Discussion 0
Question # 48

Given the following data tables:

Question # 48

Which of the following MDM processes needs to take place FIRST?

Options:

A.  

Creation of a data dictionary

B.  

Compliance with regulations

C.  

Standardization of data field names

D.  

Consolidation of multiple data fields

Discussion 0
Question # 49

Which of the following file formats is best suited to start exploratory analysis within statistical software?

Options:

A.  

CSV

B.  

XLSM

C.  

XML

D.  

JSON

Discussion 0
Question # 50

A data analyst has been asked to create one table that has each employee's first name, last name, sales, and address. The sales and addresses are listed in the tables below:

Question # 50

Which of the following steps should the analyst take to create the table?

Options:

A.  

Transpose the first name and last name in both tables. Use lookup to pull the address field from Table 2 into Table 1.

B.  

Use lookup with the first name or first name to pull the address field from Table 2 into Table 1.

C.  

Use the append formula in both tables for the first name and last name. Use lookup to pull the address field from Table 2 into Table 1.

D.  

Create a column that concatenates the first name and last name in each table. Use concatenate and lookup to bring the address field into Table 1.

Discussion 0
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