Free CompTIA DA0-001 Practice Test & Real Exam Questions
Which of the following best describes the use of a tab sequence?
Correct Answer: A
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Which of the following value is the measure of dispersion "range" between the scores of ten students in a test.
The scores of ten students in a test are 17, 23, 30, 36, 45, 51, 58, 66, 72, 77.
The scores of ten students in a test are 17, 23, 30, 36, 45, 51, 58, 66, 72, 77.
Correct Answer: A
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Given the following athlete workout data (with inconsistent units or formats for time/distance), which of the following best describes the data quality issue?
Correct Answer: A
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Which of the following is a difference between a primary key and a unique key?
Correct Answer: D
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Which of the following contains alphanumeric values?
Correct Answer: A
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A data analyst wants to create "Income Categories" that would be calculated based on the existing variable
"Income". The "Income Categories" would be as follows:
Income category 1: less than $1.
Income category 2: more than $1 and less than $20,000.
Income category 3: more than $20,001 and less than $40,000.
Income category 4: more than $40,001.
Which of the following data manipulation techniques should the data analyst use to create "Income Categories"?
"Income". The "Income Categories" would be as follows:
Income category 1: less than $1.
Income category 2: more than $1 and less than $20,000.
Income category 3: more than $20,001 and less than $40,000.
Income category 4: more than $40,001.
Which of the following data manipulation techniques should the data analyst use to create "Income Categories"?
Correct Answer: D
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Given the diagram below:
Which of the following types of sampling is depicted in the image?
Which of the following types of sampling is depicted in the image?
Correct Answer: C
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Given the following data table:
Which of the following are appropriate reasons to undertake data cleansing? (Select two).
Which of the following are appropriate reasons to undertake data cleansing? (Select two).
Correct Answer: E,F
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Which of the following best describes a 95% confidence interval?
Correct Answer: C
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An analyst is reporting on the average income for a county and is reviewing the following data:
Which of the following is the reason the analyst would need to cleanse the data in this data set?
Which of the following is the reason the analyst would need to cleanse the data in this data set?
Correct Answer: D
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Which of the following query optimization techniques involves examining only the data that is needed for a particular task?
Correct Answer: B
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Samantha needs to share a list of her organization's top 50 customers with the VP of sales.
She would like to include the name of the customer, the business they represent, their contact information, and their total sales over the past year.
The VP does not have any specialized analytics skills or software but would like to make some personal notes on the dataset.
What would be the best tool for Samantha to use to share this information?
She would like to include the name of the customer, the business they represent, their contact information, and their total sales over the past year.
The VP does not have any specialized analytics skills or software but would like to make some personal notes on the dataset.
What would be the best tool for Samantha to use to share this information?
Correct Answer: A
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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?
Correct Answer: D
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The number of phone calls that the call center receives in a day is an example of:
Correct Answer: A
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Consider the following dataset which contains information about houses that are for sale:
Which of the following string manipulation commands will combine the address and region namecolumns to create a full address?
full_address------------------------- 85 Turner St, Northern Metropolitan 25 Bloomburg St, Northern Metropolitan 5 Charles St, Northern Metropolitan 40 Federation La, Northern Metropolitan 55a Park St, Northern Metropolitan
Which of the following string manipulation commands will combine the address and region namecolumns to create a full address?
full_address------------------------- 85 Turner St, Northern Metropolitan 25 Bloomburg St, Northern Metropolitan 5 Charles St, Northern Metropolitan 40 Federation La, Northern Metropolitan 55a Park St, Northern Metropolitan
Correct Answer: C
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