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CompTIA Certification
DA0-001 Exam
CompTIA.DA0-001.v2026-02-06.q156 Dumps

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Question 121

Which of the following contains alphanumeric values?

A.10.1Ε²
B.13.6
C.1347
D.A3J7

Correct Answer: D

Alphanumeric values are values that contain both letters and numbers, such as A3J7. The other options are numeric values, as they contain only numbers, such as 10.1E2, 13.6, and 1347. Reference: Guide to CompTIA Data+ and Practice Questions - Pass Your Cert

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Question 122

A data engineer is creating a database field to capture whether a customer likes vanilla ice cream. Which of the following data types is the best to capture this information?

A.Integer
B.Boolean
C.Categorical
D.Numeric

Correct Answer: B

Comprehensive and Detailed In-Depth Explanation:
When designing a database field to capture a binary preference, such as whether a customer likes vanilla ice cream, the most appropriate data type is:
Option B:Boolean
* Rationale:A Boolean data type is used to represent binary values, typically TRUE or FALSE. In this context, it efficiently captures whether a customer likes (TRUE) or does not like (FALSE) vanilla ice cream.
Option A:Integer
* Rationale:While integers represent whole numbers, using them to denote binary choices (e.g., 1 for
"likes" and 0 for "dislikes") is less intuitive and can lead to ambiguity without proper context.
Option C:Categorical
* Rationale:Categorical data types are used for fields that can take on one of a limited set of values, representing different categories. While "likes" and "dislikes" could be categories, a Boolean is more efficient for binary choices.
Option D:Numeric
* Rationale:Numeric data types encompass both integers and floating-point numbers. Using a numeric type for a binary preference is unnecessary and could lead to data integrity issues.

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Question 123

A data analyst received the information in the table below from a recently completed marketing campaign:

Which of the following is the total order conversion rate?

A.13.2%
B.14.8%
C.22.3%
D.85.2%

Correct Answer: B

The correct answer is A. 13.2%.
The total order conversion rate is the ratio of the total number of orders to the total number of clicks, expressed as a percentage. To calculate the total order conversion rate, we need to sum up the clicks and orders from all the channels, and then divide the orders by the clicks and multiply by 100.
Using the data from the table, we can do the following:
* Total clicks = 580 + 800 + 1,200 + 300 + 620 = 3,500
* Total orders = 55 + 100 + 220 + 60 + 85 = 520
* Total order conversion rate = (520 / 3,500) x 100 = 14.857%
* Rounding to one decimal place, we get 14.9%
Therefore, the total order conversion rate is 14.9%.

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Question 124

Which of the following is the median of the number set:3, 7, 5, 6, 9?

A.5
B.6
C.7
D.9

Correct Answer: B

Themedianis the middle value in a sorted list of numbers. The steps to determine the median are:
* Sort the numbers in ascending order:3, 5, 6, 7, 9
* Find the middle value:Since there arefivenumbers, the middle value is the third one:Median = 6
* Option A (5):Incorrect. 5 is not the middle value.
* Option B (6):Correct.6 is the middle value in the sorted list.
* Option C (7):Incorrect. 7 is not the middle value.
* Option D (9):Incorrect. 9 is the highest value, not the median.
Reference:The CompTIA Data+ (DA0-001) Study Guide defines the median as the middle value when data is arranged in ascending order.

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Question 125

A data analyst has a set with more than 40.000 rows in the sample schema below:

The analyst would like to create one column that contains the customers' birth dates. Which of the following data quality dimensions would BEST explain the reason for compilation?

A.Data duplication
B.Data completeness
C.Data accuracy
D.Data integrity

Correct Answer: D

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