DA0-001 Study Guide: CompTIA Data+ Certification Exam & DA0-001 Learning Materials

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CompTIA DA0-001 exam is a multiple-choice exam that consists of 90 questions. DA0-001 exam duration is 90 minutes, and the passing score is 720 on a scale of 100-900. DA0-001 exam is available in English, Japanese, and Portuguese. DA0-001 Exam Fees vary by location, and candidates can register for the exam through the Pearson VUE website.

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CompTIA Data+ Certification Exam Sample Questions (Q50-Q55):

NEW QUESTION # 50
An analyst is designing a dashboard that will provide a story of the sales and sales customer ratio. The following data is available:

Which of the following charts should the analyst consider including in the dashboard?

A. A scatter chart with site and sales
B. A pie chart with site and sales
C. A column chart with site and sales
D. A line chart with site and sales

Answer: C

Explanation:
For a dashboard that aims to tell a story about sales and the sales customer ratio, a column chart is an effective choice. Column charts are particularly useful for showing data changes over a period of time or for illustrating comparisons among items. In this case, a column chart can clearly display the sales figures for each site, allowing for easy comparison across different sites. Additionally, it can be used to represent the sales customer ratio by showing the proportion of sales per customer, which can provide insights into customer behavior and sales effectiveness.
* Line charts are best suited for displaying data trends over time, rather than for comparing individual categories.
* Pie charts could show the proportion of sales for each site, but they are not as effective as column charts for comparing multiple categories.
* Scatter charts are used to show the relationship between two variables, which is not the focus in this scenario.
References:
* Effective Use of Column Charts1
* Choosing the Right Chart for Your Data2
* Sales Dashboards: Examples & Templates3

NEW QUESTION # 51
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?

A. 0
B. 1.16
C. 1
D. 2

Answer: C

Explanation:
The standard deviation is a measure of the amount of variation or dispersion in a set of values. It is calculated as the square root of the variance. Given that the variance for the data set is 36 gallons, the standard deviation can be found by taking the square root of 36, which is 6. Therefore, the standard deviation for the number of gallons of oil produced each day is 6 gallons.
Reference:
The concept of standard deviation and its calculation is a fundamental aspect of statistics, which is well-documented in statistical textbooks and resources.
The calculation performed to arrive at the answer is based on the mathematical operation of taking the square root of the variance value.

NEW QUESTION # 52
Harry is looking at home sales prices in single zip code and notices that one home sold for $940,394 when the average selling price of similar homes is $210,420.
What type of data does the $940,394 sales price represent?
Choose the best answer.

A. Redundant data.
B. Duplicate data.
C. Invalid data.
D. Data outlier.

Answer: D

Explanation:
Correct answer B. Data outlier.
Since the value is more than four times the average, the $940,394 value is an outlier.

NEW QUESTION # 53
A research analyst collects ten data points from 1.000 specimens. The analyst will not need any additional data to complete the analysis and will not need to retrieve information by specifier. Which of the following is the best data structure for the analyst to use?

A. Flat file
B. Relational database
C. JSON
D. NoSQL

Answer: A

Explanation:
A flat file is a type of data structure that stores data in a plain text format, such as CSV, TSV, or TXT. A flat file consists of one or more records, each containing one or more fields, separated by a delimiter, such as a comma, tab, or space. A flat file does not have any hierarchical or relational structure, and does not support any complex queries or operations1.
A flat file may be the best data structure for the analyst to use in this scenario, because:
The analyst collects ten data points from 1,000 specimens, which means the data is relatively small and simple, and can be easily stored and processed in a flat file.
The analyst will not need any additional data to complete the analysis, which means the data is static and does not require any updates or modifications.
The analyst will not need to retrieve information by specifier, which means the data does not require any indexing or searching by key or value.

NEW QUESTION # 54
A sales team wants visibility of current sales numbers, pipeline, and team performance. The team would also like to see calculations of individuals' earned commissions and projected commissions based on sales, but they want that information to be kept confidential. Which of the following would be the BEST way to provide this visibility?

A. Create a dashboard displaying a data refresh date so users know the current sales numbers and configure permissions to control access.
B. Create a dashboard with views for team, individuals, and management. Configure permissions to control access.
C. Create a dashboard with filters for the overall team, individuals, and management. Users can filter to see the data they want.
D. Create a dashboard for sales numbers, pipeline, and team and individual performance for the management team.

Answer: D

NEW QUESTION # 55
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