(2025) DA0-001 Dumps and Practice Test (312 Questions) [Q87-Q110]

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(2025) DA0-001 Dumps and Practice Test (312 Questions)

Guide (New 2025) Actual CompTIA DA0-001 Exam Questions

CompTIA DA0-001 Certification is an industry-recognized certification that is highly valued by employers. It is a great way for professionals to showcase their expertise in data management and to demonstrate their commitment to the field. With this certification, professionals can enhance their career prospects and increase their earning potential. Moreover, this certification is also a stepping stone for other advanced certifications in the field of data management, such as the Certified Data Management Professional (CDMP) certification.

CompTIA DA0-001, also known as the CompTIA Data+ Certification Exam, is a certification aimed at IT professionals who work with data. DA0-001 exam is designed to test the candidate’s knowledge and skills in data management, analysis, and security. CompTIA Data+ Certification Exam certification is vendor-neutral, meaning that it is not tied to any specific software or hardware platform, making it a valuable credential for professionals working in different industries.

NO.87 Which of the following describes a programming language and free software environment for statistical computing and graphics?

Microsoft Power BI.

SAS.

Microsoft Excel.

NO.88 What R package makes it easy to work with dates?

Lubridate.

Datemath.

Stringr.

ggplot.

NO.89 Which of the following database schemas features normalized dimension tables?

Flat

Snowflake

Hierarchical

Star

NO.90 A publishing group has requested a dashboard to track submissions before publication. A key requirement is that all changes are tracked, as multiple users will be checking out documents and editing them before submissions are considered final. Which of the following is the BEST way to meet this stakeholder requirement?

Display the version number next to each submission on the dashboard.

Present a data refresh date at the top of the dashboard.

Confirm the dashboard is adhering to the corporate style guide.

Use permissions to ensure users only see certain versions of the submissions.

NO.91 Which of the following is the most likely reason for a data analyst to optimize a query using parameterization?

To return a subset of records

To insert a temporary table

To prevent SQL injections

To increase the query speed

NO.92 Which of the following BEST describes the issue in which character values are mixed with integer values in a data set column?

Duplicate data

Missing data

Data outliers

Invalid data type

NO.93 Which of the following is an example of a discrete variable?

The temperature of a hot tub

The height of a horse

The time to complete a task

The number of people in an office

NO.94 Which of the following is the correct data type for text?

Boolean

String

Integer

Float

NO.95 When analyzing the values of two variables, you decide to convert both variables so they are on a scale of 0 to
1.
What term describes this action?

Filtering.

Normalization.

Transposition.

Aggregation.

NO.96 An analyst has received the requirements for an internal user dashboard. The analyst confirms the data sources and then creates a wireframe. Which of the following is the NEXT step the analyst should take in the dashboard creation process?

Optimize the dashboard.

Create subscriptions.

Get stakeholder approval.

Deploy to production.

NO.97 A sales manager wants quarterly sales reports broken down by unit and week. Which of the following data output lists includes the most necessary information?

Order number. salesperson. date shipped, recipient address, and price

Item name, salesperson. recipient address, shipping cost. and date shipped

Item number, item name, salesperson. date sold. and price

Item name. salesperson. price. shipping cost. and date shipped

NO.98 Which of the following is used for calculations and pivot tables?

IBM SPSS

SAS

Microsoft Excel

Domo

Explanation
This is because Microsoft Excel is a type of software application that allows users to create, edit, and analyze data in spreadsheets, which are composed of rows and columns of cells that can store various types of data, such as numbers, text, or formulas. Microsoft Excel can be used for calculations and pivot tables, which are two common features or functions in data analysis. Calculations are mathematical operations or expressions that can be performed on the data in the cells, such as addition, subtraction, multiplication, division, average, sum, etc. Pivot tables are interactive tables that can summarize and display the data in different ways, such as by grouping, filtering, sorting, or aggregating the data based on various criteria or categories. The other software applications are not used for calculations and pivot tables. Here is why:
IBM SPSS is a type of software application that allows users to perform statistical analysis and modeling on data sets, such as regression, correlation, ANOVA, etc. IBM SPSS does not use spreadsheets or cells to store or manipulate data, but rather uses data views or variable views to display the data in rows and columns. IBM SPSS does not have pivot tables as a feature or function, but rather has output views or charts to display the results of the analysis.
SAS is a type of software application that allows users to perform data management and analysis using a programming language that consists of statements and commands. SAS does not use spreadsheets or cells to store or manipulate data, but rather uses data sets or tables that are stored in libraries or folders. SAS does not have pivot tables as a feature or function, but rather has procedures or macros that can produce summary tables or reports based on the data.
Domo is a type of software application that allows users to create and share dashboards and visualizations that display data from various sources and systems, such as databases, cloud services, or web applications. Domo does not use spreadsheets or cells to store or manipulate data, but rather uses connectors or APIs to access and integrate the data from different sources. Domo does not have pivot tables as a feature or function, but rather has cards or widgets that can show different aspects or metrics of the data.

NO.99 While reviewing survey data, an analyst notices respondents entered “Jan,” “January,” and “01” as responses for the month of January. Which of the following steps should be taken to ensure data consistency?

Delete any of the responses that do not have “January” written out.

Replace any of the responses that have “01”.

Filter on any of the responses that do not say “January” and update them to “January”.

Sort any of the responses that say “Jan” and update them to “01”.

NO.100 A data analyst needs to perform a full outer join of a customer’s orders using the tables below:

Which of the following is the mean of the order quantity?

73.5

76.5

78.8

81.5

NO.101 Which of the following best describes the process of examining data for statistics and information about the data?
Cleansing

Profiling

Governance

NO.102 Zip code,____________, and___________ uniquely identify 87% of people in the United States.

first name, last name

phone number, email address

date of birth, gender

gender, first name

NO.103 The number of phone calls that the call center receives in a day is an example of:

continuous data.

categorical data.

ordinal data.

discrete data.

NO.104 The current date is July 14, 2020. A data analyst has been asked to create a report that shows the company’s year-over-year Q2 2020 sales. Which of the following reports should the analyst compare?

A Q2 2020 and Q4 2019

YTD 2020 and YTD 2019

Q2 2020 and Q2 2019

Q2 2020 and Q2 2021

NO.105 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?

7,038

9,600

10,600

10,800

NO.106 A data analyst is performing a data merge within a spreadsheet using the tables below:

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?

Use concatenate to combine the tables.

Ensure the formula is pulling from right to left.

Sort the data by the last name field.

Review the spelling and data type.

NO.107 Refer to the exhibit.
Given the image below:

The data should be cleaned because of the presence of:

outlier

non-parametric data.

multicollinearity.

invalid data.

NO.108 A database administrator needs to ensure only approved users can access specific database tables to perform financial functions. Which of the following is the best access control method for the administrator to use?

Role-based

Rule-based

Discretionary

Group-based

NO.109 An analyst needs to conduct a quick analysis. Which of the following is the FIRST step the analyst should perform with the data?

Conduct an exploratory analysis and use descriptive statistics.

Conduct a trend analysis and use a scatter chart.

Conduct a link analysis and illustrate the connection points.

Conduct an initial analysis and use a Pareto chart.

NO.110 ‘Which of the following is the BEST reason to use database views instead of tables?

Views reduce the need for repetitive, complex data joins.

Views allow for the storage of temporary data. whereas tables do not.