Vce CompTIA DA0-002 File - New DA0-002 Test Question

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CompTIA DA0-002 Exam Syllabus Topics:

Topic	Details
Topic 1	Data Mining: This section of the exam measures skills of a Business Intelligence Analyst and covers how data is collected, cleaned, and prepared for analysis. It explains methods like ETL and ELT for data integration, as well as web scraping, API use, and survey data collection. Candidates are expected to identify issues like missing or duplicated data and apply techniques like filtering, sorting, merging, and normalizing. The section also touches on query optimization strategies to improve data handling efficiency.
Topic 2	5.0 Data Governance, Quality, and Controls
Topic 3	Visualization: This section of the exam measures skills of a Data Visualisation Specialist and focuses on turning raw data into clear, visual insights. It teaches how to match visual formats like bar charts, heat maps, and line graphs to specific audiences and needs. Candidates must understand how to create dashboards and reports using proper design elements such as labels, layout, branding, and colour schemes. This section also includes best practices for dashboard development and delivery through various platforms and user access levels.
Topic 4	Data Concepts and Environments: This section of the exam measures the skills of a Junior Data Analyst and focuses on understanding core data concepts such as database types, schema structures, and data formats. It highlights differences between structured and unstructured data, compares file types like CSV, JSON, and XML, and introduces key ideas about data dimensions and slowly changing dimensions. Knowing how data is stored and organized helps professionals better prepare for analysis and reporting tasks.

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CompTIA Data+ Exam Sample Questions (Q145-Q150):

NEW QUESTION # 145
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?

A. Snapshot
B. Ad hoc
C. Summary
D. Infographic

Answer: C

NEW QUESTION # 146
The human resources department wants to know the number of employees who earn $125,000 or more. However, the department is concerned about duplicates in the data set. Given the following table:

Which of the following SQL statements resolves this issue?

A. SELECT COUNT(DISTINCT Employee_ID) FROM Employee WHERE Salary >= 125000
B. SELECT DISTINCT Employee_ID FROM Employee WHERE Salary >= 125000
C. SELECT DISTINCT Employee_ID FROM Employee WHERE Salary > 125000
D. SELECT COUNT(Employee_ID) FROM Employee WHERE Salary >= 125000

Answer: A

Explanation:
Counting distinct employee IDs removes duplicates while still restricting the result to employees whose salary is at least $125,000, which returns the number of unique employees meeting the requirement.

NEW QUESTION # 147
Which of the following data structures would a data engineer most likely receive when using a get command?

A. CSS
B. HTML
C. XLSM
D. JSON

Answer: D

Explanation:
JSON (JavaScript Object Notation) is a common data structure returned by GET requests in APIs and web services. It provides a lightweight, structured format for exchanging data between systems and is widely used for transmitting records, objects, and arrays.

NEW QUESTION # 148
A data analyst needs to remove all duplicate values between two tables, "Employees" and
"Managers," using SQL SELECT statements. Which of the following should the analyst use for this task?

A. SELECT * FROM Employees CROSS JOIN SELECT * FROM Managers
B. SELECT * FROM Employees UNION ALL SELECT * FROM Managers
C. SELECT * FROM Employees JOIN SELECT * FROM Managers
D. SELECT * FROM Employees UNION SELECT * FROM Managers

Answer: D

Explanation:
UNION combines the results of two SELECT statements and automatically removes duplicate rows from the combined result set. This makes it the appropriate choice when the requirement is to eliminate all duplicate values between the Employees and Managers tables.

NEW QUESTION # 149
A manager wants a report that contains the days off for each direct report. The manager needs this report to always be up-to-date with the latest data. Which of the following describes the refresh frequency that the manager is requesting?

A. Snapshot
B. Dynamic
C. Ad hoc
D. Real-time

Answer: D

Explanation:
This question pertains to the Visualization and Reporting domain, focusing on report refresh frequencies.
The manager needs the report to always be up-to-date, implying continuous data updates.
* Real-time (Option A): Real-time refresh frequency ensures the report reflects the latest data as soon as it changes, which matches the requirement to "always be up-to-date."
* Ad hoc (Option B): Ad hoc reports are generated on-demand, not continuously updated.
* Snapshot (Option C): A snapshot captures data at a specific point in time, not suitable for always being up-to-date.
* Dynamic (Option D): Dynamic reports allow interactivity, but the term doesn't specifically imply real- time updates.
The DA0-002 Visualization and Reporting domain includes "the appropriate visualization in the form of a report" with delivery methods, and real-time refresh frequency ensures the report is always current.
Reference: CompTIA Data+ DA0-002 Draft Exam Objectives, Domain 4.0 Visualization and Reporting.

NEW QUESTION # 150
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