CompTIA DA0-001 CompTIA Data+ Certification Online Training
CompTIA DA0-001 Online Training
The questions for DA0-001 were last updated at Jan 28,2025.
- Exam Code: DA0-001
- Exam Name: CompTIA Data+ Certification
- Certification Provider: CompTIA
- Latest update: Jan 28,2025
An e-commerce company recently tested a new website layout. The website was tested by a test group of customers, and an old website was presented to a control group.
The table below shows the percentage of users in each group who made purchases on the websites:
Which of the following conclusions is accurate at a 95% confidence interval?
- A . In Germany, the increase in conversion from the new layout was not significant.
- B . In France, the increase in conversion from the new layout was not significant.
- C . In general, users who visit the new website are more likely to make a purchase.
- D . The new layout has the lowest conversion rates in the United Kingdom.
An analyst needs to provide a chart to identify the composition between the categories of the survey response data set:
Which of the following charts would be BEST to use?
- A . Histogram
- B . Pie
- C . Line
- D . Scatter pot
- E . Waterfall
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?
- A . 394mm
- B . 405mm
- C . 493mm
- D . 504mm
Which of the following are reasons to create and maintain a data dictionary? (Choose two.)
- A . To improve data acquisition
- B . To remember specifics about data fields
- C . To specify user groups for databases
- D . To provide continuity through personnel turnover
- E . To confine breaches of PHI data
- F . To reduce processing power requirements
A recurring event is being stored in two databases that are housed in different geographical locations. A data analyst notices the event is being logged three hours earlier in one database than in the other database.
Which of the following is the MOST likely cause of the issue?
- A . The data analyst is not querying the databases correctly.
- B . The databases are recording different events.
- C . The databases are recording the event in different time zones.
- D . The second database is logging incorrectly.
Which of the following is an example of a at flat file?
- A . CSV file
- B . PDF file
- C . JSON file
- D . JPEG file
Refer to the exhibit.
Given the following graph:
Which of the following summary statements upholds integrity in data reporting?
- A . Sales are approximately equal for Product A and Product B across all strategies.
- B . Strategy 4 provides the best sales in comparison to other strategies.
- C . While Strategy 2 does not result in the highest sales of Product D, over all products it appears to be the most effective.
- D . Product D should be promoted more than the other products in all strategies.
An analyst is required to run a text analysis of data that is found in articles from a digital news outlet.
Which of the following would be the BEST technique for the analyst to apply to acquire the data?
- A . Web scraping
- B . Sampling
- C . Data wrangling
- D . ETL
An analyst runs a report on a daily basis, and the number of datapoints must be validated before the data can be analyzed. The number of datapoints increases each day by approximately 20% of the total number from the day before. On a given day, the number of datapoints was 8,798.
Which of the following should be the total number of datapoints on the next day?
- A . 7,038
- B . 9,600
- C . 10,600
- D . 10,800
An analyst has been tracking company intranet usage and has been asked to create a chat to show the most-used/most-clicked portions of a homepage that contains more than 30 links.
Which of the following visualizations would BEST illustrate this information?
- A . Scatter plot
- B . Heat map
- C . Pie chart
- D . Infographic
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