CompTIA Data+ Certification Exam - DA0-001 Exam Practice Test

Question 1

Which of the following would be the best way to identify multicollinear attributes in a data set?

A. Correlation coefficient

B. Two-way ANOVA

C. Chi-squared test

D. Two-sample f-test

Correct Answer: A

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Question 2

Which of the following database schemas features normalized dimension tables?

A. Star

B. Flat

C. Hierarchical

D. Snowflake

Correct Answer: D

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Question 3

A site reliability team wants to monitor the stability of their website. so they can proactively diagnose issues when they occur Which of the following deliverables would best suit their needs?

A. A self-serve dashboard of website performance that updates in real time

B. A weekly log report of site visits and user actions

C. A daily summary email indicating website outages for the previous day

D. A portal that is refreshed daily and reports errors classified by type

Correct Answer: A

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Question 4

A data analyst is developing a dashboard to track and monitor metrics. Which of the following best practices should be taken into during the FIRST pment process?

A. Copy a dashboard design from the Internet.

B. Deploy to production.

C. Develop a dashboard.

D. Create a A Aupirarrame:

Correct Answer: D

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Question 5

Given the following tables:

Which of the following will be the dimensions from a FULL JOIN of the tables above?

A. Two rows and three columns

B. Four rows and two columns

C. Four rows and four columns

D. Three rows and four columns

Correct Answer: C

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Question 6

A development company is constructing a new unit in its apartment complex. The complex has the following floor plans:

Using the average cost per square foot of the original floor plans, which of the following should be the price of the Rose unit?

A. $640,900

B. $702,500

C. $705,200

D. $690,000

Correct Answer: C

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Question 7

Which of the following data types would a telephone number formatted as XXX-XXX-XXXX be considered?

A. Text

B. Date

C. Numeric

D. Float

Correct Answer: A

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Question 8

An analyst needs to know what data an organization possesses. Which of the following is the best document for the analyst to consult?

A. Data dictionary

B. Data destruction policy

C. Data use document

D. Data retention policy

Correct Answer: A

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Question 9

A database administrator is required to mask certain table columns containing PII in order to comply with the company privacy policy. Which of the following are the most likely types of information the administrator should mask? (Select two).

A. Customer ID

B. Order ID

C. Order date

D. Government-issued ID

E. Referral number

F. Address

Correct Answer: D,F

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Question 10

What would be an example of an acceptable form of primary identification for the Data+ exam?

A. Passport.

B. School ID card.

C. Credit card with photo and signature.

D. Employee ID card.

Correct Answer: A

Question 11

A data analyst needs to apply quality control concepts to a data set for accuracy. Which of the following is the best way to do this?

A. Parameterization

B. Encryption

C. Standardization

D. Cross-validation

Correct Answer: D

Question 12

Randy scored 76 on a math test, Katie scored 86 on a science test, Ralph scored 80 on a history test, and Jean scored 80 on an English test. The table below contains the mean and standard deviation of the scores for each of the courses:

Using this information, which of the following students had the BEST score?

A. Randy

B. Katie

C. Jean

D. Ralph

Correct Answer: B

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Question 13

Given the following data table:

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

A. Redundant data

B. Duplicate data

C. Invalid data

D. Missing data

E. Non-parametric data

F. Normalized data

Correct Answer: C,D

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CompTIA Data+ Certification - DA0-001 Exam Practice Test

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