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CompTIA Data+ Certification Exam Sample Questions (Q102-Q107):

NEW QUESTION # 102
Which of the following is a control measure for preventing a data breach?

• A. Data transmission
• B. Data attribution
• C. Data retention
• D. Data encryption

Answer: D
NEW QUESTION # 103
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. Normalization.
• B. Transposition.
• C. Aggregation.
• D. Filtering.

Answer: A 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 # 104
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?

• A. A real-time monitor that allows the manager to view performance the day the campaign was launched
• B. A summary with statistics, conclusions, and recommendations from the data analyst
• C. A sell-service dashboard that allows the manager to look at the company's annual budget performance
• D. A spreadsheet of the raw data from all marketing campaigns and channels

Answer: B
NEW QUESTION # 105
You are looking at a dashboard is sales by a US state and would like to see the sales for individual counties within a specific state What action should you take?

• A. Aggregate.
• B. Drill down.
• C. Roll up.
• D. Deviate.

Answer: B
NEW QUESTION # 106
You have a database where queries are performing slowly.
Investigating the results, you find that the database is performing a time-consuming table scan.
What action can best improve the query performance?

• A. Sub setting the records.
• B. Parameterizing the query.
• C. Recompiling the query.
• D. Adding an index.

Answer: D Explanation:
You create an index to optimize performance when searching the table using the Find function and to establish uniqueness of table columns.
Indexing makes columns faster to query by creating pointers to where data is stored within a database. Imagine you want to find a piece of information that is within a large database. To get this information out of the database the computer will look through every row until it finds it.
NEW QUESTION # 107
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