Free DA0-002: CompTIA Data+ Exam (2025) Exam Questions and Answers
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Last updated: September 19, 2026
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Question #1
Which of the following best enables the retrieval and manipulation of data that is stored in a relational database?
Please select an optionIncorrectCorrect answer: B
This question pertains to theData Concepts and Environmentsdomain, focusing on tools for interacting with relational databases. The task is to identify the best method for retrieving and manipulating data. • XML (Option A): XML is a data format, not a language for retrieving or manipulating database data. • SQL (Option B): SQL (Structured Query Language) is specifically designed for querying and manipulating data in relational databases (e.g., SELECT, UPDATE), making it the best choice. • Excel (Option C): Excel can analyze data but isn't designed for direct database manipulation. • JavaScript (Option D): JavaScript is a programming language for web development, not optimized for relational database operations. The DA0-002 Data Concepts and Environments domain includes understanding "different types of databases," and SQL is the standard language for relational database operations. Reference: CompTIA Data+ DA0-002 Draft Exam Objectives, Domain 1.0 Data Concepts and Environments.
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Which of the following best describes an assessment a data analyst would use to validate that the number of records in a dataset matches the expected results?
Please select an optionIncorrectCorrect answer: B
This question pertains to theData Governancedomain, focusing on data quality validation techniques. The task is to validate that the number of records matches expectations, which requires a specific type of assessment. • Source control (Option A): Source control (e.g., Git) manages code versions, not dataset validation. • Unit test (Option B): A unit test checks a specific component of a process, such as verifying that the number of records in a dataset matches the expected count, making it the best fit. • Stress test (Option C): Stress tests evaluate system performance under load, not record counts. • Health check (Option D): A health check monitors system status but isn't specific to validating record counts. The DA0-002 Data Governance domain includes "data quality control concepts," and unit tests are a standard method for validating specific data outcomes like record counts. Reference: CompTIA Data+ DA0-002 Draft Exam Objectives, Domain 5.0 Data Governance.
Was this answer correct?Question #3
Which of the following pieces of information, if made public, results in a data privacy violation?
Please select an optionIncorrectCorrect answer: B
This question falls under theData Governancedomain, which in DA0-002 includes understanding data privacy and compliance with regulations like GDPR. The question asks which piece of information, if made public, constitutes a privacy violation, meaning it must be personally identifiable information (PII). • Gender (Option A): Gender is not typically considered PII on its own, as it's not uniquely identifiable. • Driver's license (Option B): A driver's license number is PII because it uniquely identifies an individual and can be linked to other personal information, such as name and address. Making it public violates privacy regulations. • Age (Option C): Age alone isn't PII, as it's not uniquely identifiable. • Employment status (Option D): Employment status (e.g., employed, unemployed) isn't PII, as it doesn't uniquely identify an individual. The DA0-002 Data Governance domain includes "identifying PII and data privacy concepts," and a driver's license is a clear example of PII that, if exposed, results in a privacy violation. Reference: CompTIA Data+ DA0-002 Draft Exam Objectives, Domain 5.0 Data Governance. ==============
Was this answer correct?Question #4
Which of the following best represents a type of infrastructure that requires a company to purchase and maintain all of its own servers?
Please select an optionIncorrectCorrect answer: A
This question pertains to theData Concepts and Environmentsdomain, focusing on types of server infrastructure. The task is to identify an infrastructure where a company owns and maintainsall servers. • Private (Option A): A private infrastructure (often on-premises) means the company owns and maintains its own servers, typically in a private data center, which matches the requirement. • Cloud (Option B): Cloud infrastructure is managed by third-party providers, not owned by the company. • Hybrid (Option C): Hybrid combines on-premises and cloud, so not all servers are owned by the company. • Public (Option D): Public infrastructure is a cloud model shared across multiple organizations, not owned by the company. The DA0-002 Data Concepts and Environments domain includes understanding "data environments," and a private infrastructure requires the company to purchase and maintain its own servers. Reference: CompTIA Data+ DA0-002 Draft Exam Objectives, Domain 1.0 Data Concepts and Environments. ==============
Was this answer correct?Question #5
A data analyst needs to provide a weekly sales report for the Chief Financial Officer. Which of the following delivery methods is the most appropriate?
Please select an optionIncorrectCorrect answer: D
This question pertains to theVisualization and Reportingdomain, focusing on report delivery methods for a specific audience. The Chief Financial Officer (CFO) needs a weekly sales report,suggesting a concise, executive-level summary. • A granular daily report in a dashboard (Option A): Daily granularity is too frequent for a weekly report, and a dashboard might be too interactive for a CFO's needs. • A detailed text document (Option B): A detailed document is too lengthy for a CFO, who typically needs a summary. • A spreadsheet with raw data (Option C): Raw data requires further analysis, which isn't appropriate for an executive-level report. • A high-level email (Option D): A high-level email provides a concise summary of weekly sales, tailored for an executive like a CFO, making it the most appropriate delivery method. The DA0-002 Visualization and Reporting domain emphasizes "translating business requirements to form the appropriate visualization," and a high-level email is best for delivering a weekly summary to a CFO. Reference: CompTIA Data+ DA0-002 Draft Exam Objectives, Domain 4.0 Visualization and Reporting.
Was this answer correct?Question #6
Which of the following supports capabilities such as automatic versioning, corruption checks, KPIs, and user authentication?
Please select an optionIncorrectCorrect answer: D
This question falls under theData Governancedomain, focusing on tools that support data management and quality control features. The task is to identify a tool with capabilities like versioning, corruption checks, KPIs, and authentication. • Notebook (Option A): Notebooks (e.g., Jupyter) are for data analysis and coding but don't inherently support versioning, corruption checks, or authentication. • REST API (Option B): REST APIs enable data access but don't provide versioning or corruption checks as a primary function. • Pipeline (Option C): Data pipelines automate data workflows but don't typically include versioning or authentication. • Source control (Option D): Source control systems (e.g., Git) support automatic versioning (tracking changes), corruption checks (integrity verification), KPIs (e.g., commit frequency), and user authentication (access control), making this the best fit. The DA0-002 Data Governance domain includes "data quality control concepts," and source control systems provide the listed capabilities to ensure data integrity and security. Reference: CompTIA Data+ DA0-002 Draft Exam Objectives, Domain 5.0 Data Governance. ==============
Was this answer correct?Question #7
An analyst needs to create a collection of dashboards for multiple teams within their organization. Which of the following should the analyst do first before starting the project?
Please select an optionIncorrectCorrect answer: A
This question pertains to theVisualization and Reportingdomain, focusing on the initial steps in dashboard creation. The analyst is starting a project for multiple teams, so understanding the audience is critical. • Evaluate the user persona type for the dashboards (Option A): User personas define the needs, roles, and preferences of the audience (e.g., executives vs. analysts), which is the firststep to ensure the dashboards meet user requirements. • Determine the number of team members who need to access the dashboards (Option B): This is important for access control but not the first step in design. • Determine the delivery method of the dashboards (Option C): Delivery method (e.g., self-service) is decided later, after understanding user needs. • Evaluate the KPIs for the dashboards (Option D): KPIs are defined after understanding the user personas and their goals. The DA0-002 Visualization and Reporting domain emphasizes "translating business requirements to form the appropriate visualization," and evaluating user personas is the first step in this process. Reference: CompTIA Data+ DA0-002 Draft Exam Objectives, Domain 4.0 Visualization and Reporting. ==============
Was this answer correct?Question #8
A data analyst needs to identify outliers from a given dataset. Which of the following visualizations is the best way to identify outliers?
Please select an optionIncorrectCorrect answer: A
This question falls under theVisualization and Reportingdomain, focusing on selecting the appropriate visualization to identify outliers in a dataset. • Box plot (Option A): A box plot displays the distribution of data, including the median, quartiles, and outliers (data points beyond the whiskers), making it the best choice for identifying outliers. • Scatter plot (Option B): A scatter plot shows relationships between two variables, and while outliers may be visible, it's not specifically designed for outlier detection. • Gantt chart (Option C): Gantt charts are for project scheduling, not suitable for outlier identification. • Waterfall chart (Option D): Waterfall charts show cumulative changes (e.g., financial contributions), not designed for outlier detection. The DA0-002 Visualization and Reporting domain emphasizes "translating business requirements to form the appropriate visualization," and a box plot is the standard visualization for identifying outliers. Reference: CompTIA Data+ DA0-002 Draft Exam Objectives, Domain 4.0 Visualization and Reporting. ==============
Was this answer correct?Question #9
The following SQL code returns an error in the program console: SELECT firstName, lastName, SUM(income) FROM companyRoster SORT BY lastName, income Which of the following changes allows this SQL code to run?
Please select an optionIncorrectCorrect answer: B
This question falls under theData Analysisdomain, focusing on SQL query correction. The query uses an aggregate function (SUM) but has two issues: it uses "SORT BY" (incorrect syntax) and lacks a GROUP BY clause for non-aggregated columns. • The query selects firstName, lastName, and SUM(income), but firstName and lastName are not aggregated, requiring a GROUP BY clause. • "SORT BY" is incorrect; the correct syntax is "ORDER BY." • Option A: SELECT firstName, lastName, SUM(income) FROM companyRoster HAVING SUM(income) > 10000000This adds a HAVING clause but doesn't fix the GROUP BY issue, so it's still invalid. • Option B: SELECT firstName, lastName, SUM(income) FROM companyRoster GROUP BY firstName, lastNameThis adds the required GROUP BY clause for firstName and lastName, fixing the aggregation error. While it removes the ORDER BY, the query will run without it, addressing the primary error. • Option C: SELECT firstName, lastName, SUM(income) FROM companyRoster ORDER BY firstName, incomeThis fixes "SORT BY" to "ORDER BY" but doesn't address the missing GROUP BY, so the query remains invalid. • Option D: SELECT firstName, lastName, SUM(income) FROM companyRosterThis removes the ORDER BY but still lacks the GROUP BY clause, making it invalid. The DA0-002 Data Analysis domain includes "applying the appropriate descriptive statistical methods using SQL queries," and adding GROUP BY fixes the aggregation error, allowing the query to run. Reference: CompTIA Data+ DA0-002 Draft Exam Objectives, Domain 3.0 Data Analysis. ==============
Was this answer correct?Question #10
A data analyst wants to use the following tables to find all the customers who have not placed an order: Customers table ID Name Address Products table ID Name Customer_ID Which of the following SQL statements is the best way to accomplish this task?
Please select an optionIncorrectCorrect answer: A
This question pertains to theData Analysisdomain, focusing on SQL queries to analyze data relationships. The task is to find customers who have not placed an order, meaning customers in the Customers table without a matching Customer_ID in the Products table. • Option A: SELECT * FROM CUSTOMERS AS C LEFT JOIN PRODUCTS AS P ON C.ID = P.Customer_ID WHERE P.Customer_ID IS NULLA LEFT JOIN includes all customers, even those without orders (where Products columns are NULL). Filtering with WHERE P.Customer_ID IS NULL selects only customers without a match in Products, correctly identifying those who haven't ordered. • Option B: SELECT * FROM CUSTOMERS AS C INNER JOIN PRODUCTS AS P ON C.ID = C.ID WHERE COUNT(P.*) = 0An INNER JOIN only includes matching records, so it won't return customers without orders. The join condition C.ID = C.ID is also incorrect, and COUNT requires a GROUP BY, making this invalid. • Option C: SELECT * FROM PRODUCTS AS P INNER JOIN CUSTOMERS AS C ON P.Customer_ID = C.ID WHERE (SELECT COUNT(P.*) = 0)An INNER JOIN excludes customers without orders, and the subquery syntax is incorrect (COUNT needs a GROUP BY or to be part of a HAVING clause). • Option D: SELECT * FROM PRODUCTS AS P LEFT JOIN CUSTOMERS AS C ON P.Customer_ID = C.ID WHERE P.Customer_ID IS NOT NULLThis starts with Products and joins Customers, returning only records with orders (opposite of the task), and IS NOT NULL further excludes non-ordering customers. The DA0-002 Data Analysis domain includes "applying the appropriate descriptive statistical methods using SQL queries," and a LEFT JOIN with a NULL check is the standard method for finding non-matching records. Reference: CompTIA Data+ DA0-002 Draft Exam Objectives, Domain 3.0 Data Analysis. ==============
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