Free CompTIA DA0-002 Exam Dumps Questions

A manager wants to use the information in a recurring report on incomplete timesheets for the prior month to guide employee outreach. Which of the following report types is the best for this task?

Correct Answer:A
This question is part of theVisualization and Reportingdomain, focusing on selecting the appropriate report type for a specific purpose. The manager needs a recurring report on incomplete timesheets to guide outreach, which requires a concise, data-driven report.
✑ Summary (Option A): A summary report aggregates data (e.g., total incomplete
timesheets per employee) and presents it concisely, making it ideal for recurring use to guide decisions like employee outreach.
✑ Infographic (Option B): Infographics are visual representations for broad
audiences, not typically used for recurring, detailed employee outreach tasks.
✑ Snapshot (Option C): A snapshot report captures data at a specific point in time, but it??s not ideal for recurring analysis of trends or aggregates.
✑ Ad hoc (Option D): Ad hoc reports are one-time, on-demand reports, not suitable for recurring needs.
The DA0-002 Visualization and Reporting domain includes "the appropriate visualization in the form of a report" , and a summary report best fits the need for recurring, actionable data.
Reference: CompTIA Data+ DA0-002 Draft Exam Objectives, Domain 4.0 Visualization and Reporting
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An analyst needs to produce a final dataset using the following tables:
CourseID SectionNumber StudentID MATH1000
1
10009
MATH1000 2
10007
PSYC1500 1
10009
PSYC1500 1
10015
StudentID FirstName LastName
10009
Jane Smith
10007
John Doe
10015
Robert Roe
The expected output should be formatted as follows:
| CourseID | SectionNumber | StudentID | FirstName | LastName |
Which of the following actions is the best way to produce the requested output?

Correct Answer:B
This question falls under theData Acquisition and Preparationdomain, focusing on combining tables to produce a dataset. The task requires combining the Courses and Students tables to include student names with course details, based on the StudentID.
✑ Aggregate (Option A): Aggregation (e.g., SUM, COUNT) summarizes data, not
suitable for combining tables to include names.
✑ Join (Option B): A join operation (e.g., INNER JOIN on StudentID) combines the tables, matching records to produce the requested output with CourseID, SectionNumber, StudentID, FirstName, and LastName.
✑ Group (Option C): Grouping is used for aggregation (e.g., GROUP BY in SQL), not for combining tables.
✑ Filter (Option D): Filtering selects specific rows, not relevant for combining tables. The DA0-002 Data Acquisition and Preparation domain includes "executing data manipulation," such as joining tables to create a unified dataset.
Reference: CompTIA Data+ DA0-002 Draft Exam Objectives, Domain 2.0 Data Acquisition and Preparation.
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A data breach occurs at a company. Which of the following actions should be taken?

Correct Answer:B
This question falls under theData Governancedomain, focusing on data breach response protocols. A data breach requires a structured response to comply with legal and regulatory requirements.
✑ Make an announcement on social media so customers are aware as soon as
possible (Option A): Public announcement without internal coordination or
regulatory notificationcan lead to legal issues and loss of trust.
✑ Tell the company management team and then tell regulatory agencies (Option B): This follows best practices: inform internal leadership to coordinate a response, then notify regulatory agencies as required by laws (e.g., GDPR mandates notification within 72 hours).
✑ Keep the incident a secret until the issue is resolved (Option C): This violates regulations requiring timely breach notification.
✑ Inform the entire IT sector, but ask for discretion (Option D): Sharing with the IT sector is vague and risks leaks; regulatory agencies should be prioritized.
The DA0-002 Data Governance domain includes "data privacy concepts," such as proper breach response procedures, emphasizing internal and regulatory notification. Reference: CompTIA Data+ DA0-002 Draft Exam Objectives, Domain 5.0 Data Governance.
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A data analyst is analyzing the following dataset:
Transaction Date Quantity
Item
Item Price
12/12/12
11
USB Cords 9.99
11/11/11
3
Charging Block

Which of the following methods should the analyst use to determine the total cost for each transaction?

Correct Answer:D
This question falls under theData Analysisdomain, focusing on calculating new values from existing data. The task is to determine the total cost per transaction, which involves multiplying Quantity by Item Price.
✑ Parsing (Option A): Parsing involves breaking down data (e.g., splitting a string),
not calculating totals.
✑ Scaling (Option B): Scaling adjusts numerical values to a common range (e.g., normalization), not relevant for calculating totals.
✑ Compressing (Option C): Compressing reduces data size, not applicable to calculating costs.
✑ Deriving (Option D): Deriving involves creating new data fields by performing calculations on existing ones (e.g., Total Cost = Quantity ?? Item Price), which fits the task.
The DA0-002 Data Analysis domain includes "applying the appropriate descriptive statistical methods," such as deriving new fields through calculations to analyze data. Reference: CompTIA Data+ DA0-002 Draft Exam Objectives, Domain 3.0 Data Analysis.
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Which of the following supports capabilities such as automatic versioning, corruption checks, KPIs, and user authentication?

Correct 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.
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A data analyst is gathering data from multiple tables in a database. The analyst needs certain columns from each table. Which of the following is the best method to accomplish this task?

Correct Answer:D
This question falls under theData Acquisition and Preparationdomain, focusing on combining data from multiple tables. The analyst needs specific columns from each table, suggesting a method to combine data horizontally based on relationships.
✑ Aggregate (Option A): Aggregation (e.g., SUM, COUNT) summarizes data, not
suitable for combining columns from tables.
✑ Union (Option B): Union stacks tables vertically, requiring identical structures, but the analyst needs specific columns, likely based on relationships, not a vertical stack.
✑ Nest (Option C): Nesting is used for hierarchical data (e.g., JSON), not for combining relational tables.
✑ Join (Option D): A join (e.g., INNER JOIN) combines tables horizontally based on a common key, allowing the analyst to select specific columns from each table, which fits the task.
The DA0-002 Data Acquisition and Preparation domain includes "executing data manipulation," and joining tables is the best method for combining specific columns from multiple tables.
Reference: CompTIA Data+ DA0-002 Draft Exam Objectives, Domain 2.0 Data Acquisition and Preparation.
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