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Latest DA0-001 Test Practice - DA0-001 Valid Exam Answers

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CompTIA Data+ Certification Exam Sample Questions (Q300-Q305):

NEW QUESTION # 300
Encryption is a mechanism for protecting data.
When should encryption be applied to data?
Choose the best answer.

A. When data is in transit.
B. When data is at rest or in transit.
C. When data is at rest.
D. When data is at rest, unless you are using local storage.

Answer: B

Explanation:
Explanation
Correct answer B. When data is at rest or in transit.
To provide maximum protection, encrypt data both in transit and at rest.

NEW QUESTION # 301
When analyzing the values of two variables, you decide to convert both variables so they are on a scale of 0 to
1.
What term describes this action?

A. Transposition.
B. Aggregation.
C. Normalization.
D. Filtering.

Answer: C

Explanation:
Normalization is the process of reorganizing data in a database so that it meets two basic requirements: There is no redundancy of data, all data is stored in only one place. Data dependencies are logical, all related data items are stored together.
Put simply, data normalization ensures that your data looks, reads, and can be utilized the same way across all of the records in your customer database. This is done by standardizing the formats of specific fields and records within your customer database.

NEW QUESTION # 302
A gambler thinks that a coin is fair and is equally likely to turn up heads or tails when the coin is flipped.
Which of the following tests should the gambler use to fest this hypothesis?

A. Ratio test
B. t-test
C. Chi-squared test
D. Rank sum test

Answer: C

NEW QUESTION # 303
A company's marketing department wants to do a promotional campaign next month. A data analyst on the team has been asked to perform customer segmentation, looking at how recently a customer bought the product, at what frequency, and at what value. Which of the following types of analysis would this practice be considered?

A. Prescriptive
B. Gap
C. Trend
D. Custer

Answer: D

Explanation:
Customer segmentation is a type of cluster analysis, which is a method of grouping data points based on their similarities or differences. Cluster analysis can help identify patterns and trends in the data, as well as target specific groups of customers for marketing purposes. One common technique for customer segmentation is RFM analysis, which stands for recency, frequency, and monetary value. This technique assigns a score to each customer based on how recently they bought the product, how often they buy the product, and how much they spend on the product. These scores can then be used to create clusters of customers with different characteristics and preferences. Therefore, the correct answer is D. Reference: Cluster Analysis - Statistics Solutions, RFM Analysis: The Ultimate Guide for Customer Segmentation

NEW QUESTION # 304
Zip code,____________, and___________ uniquely identify 87% of people in the United States.

A. first name, last name
B. gender, first name
C. phone number, email address
D. date of birth, gender

Answer: D

NEW QUESTION # 305
......

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