Free CompTIA DA0-001 Practice Test & Real Exam Questions
Given the following customer and order tables:
Which of the following describes the number of rows and columns of data that would be present after performing an INNER JOIN of the tables?
Which of the following describes the number of rows and columns of data that would be present after performing an INNER JOIN of the tables?
Correct Answer: A
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A data analyst is performing a data merge within a spreadsheet using the tables below:
https://www.bing.com/images/blob?bcid=S1XCF9p02M4GjpbGxHj0lrIaj9sw.....4c
The analyst is attempting to pull the addresses from Table 2 into Table 1 using the last names and is receiving an error message. Which of the following steps can the analyst perform to fix the error?
https://www.bing.com/images/blob?bcid=S1XCF9p02M4GjpbGxHj0lrIaj9sw.....4c
The analyst is attempting to pull the addresses from Table 2 into Table 1 using the last names and is receiving an error message. Which of the following steps can the analyst perform to fix the error?
Correct Answer: B
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A column is being used to store strings of variable lengths. Performance is a concern, so the column needs to use as little space as possible. Which of the following data types best meets these requirements?
Correct Answer: B
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A data analyst has a set of data that shows the number of gallons of oil produced each day. The company would like to know the standard deviation for the data set. The variance for the data is 36 gallons. Which of the following is the standard deviation for gallons produced?
Correct Answer: C
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Which of the following explains why standardization of data field names is important to master data management concepts?
Correct Answer: C
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A data analyst is designing a dashboard that will provide a story of sales and determine which site is providing the highest sales volume per customer. The analyst must choose an appropriate chart to include in the dashboard. The following data is available:
Which of the following types of charts should be considered?
Which of the following types of charts should be considered?
Correct Answer: A
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Q3 2020 has just ended, and now a data analyst needs to create an ad-hoc sales report that demonstrates how well the Q3 2020 promotion went versus last year's Q3 promotion.
Which of the following date parameters should the analyst use?
Which of the following date parameters should the analyst use?
Correct Answer: A
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Which of the following is the best description of discrete data types?
Correct Answer: A
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Which of the following is a characteristic of a star schema?
Correct Answer: D
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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).
Correct Answer: A,F
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Given the table below:
Which of the following variables can be considered inconsistent, and how many distinct values should the variable have?
Which of the following variables can be considered inconsistent, and how many distinct values should the variable have?
Correct Answer: A
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Which of the following concepts should be applied if a data set with 40 fields needs to be pared down to 20 fields and contains similar data across multiple fields?
Correct Answer: D
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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?
What type of design pattern is the data warehouse using?
Correct Answer: A
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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?
300, 430, 170, 470, 600
Which of the following is the mean height for the five dogs?
Correct Answer: B
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A data analyst needs to create a data visualization that aids in un the cumulative impact of sequentially introduced values that are positive or negative. Which of the following data visualization methods should the analyst use?
Correct Answer: D
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