DA0-002対応問題集、DA0-002再テスト

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CompTIA DA0-002 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Data Governance, Quality, and Controls	15%	- Compliance, privacy, and security controls - Data quality management - Data governance frameworks and policies
Topic 2: Data Mining	25%	- Data manipulation and cleaning techniques - Data processing and transformation - Data collection and extraction methods
Topic 3: Data Concepts and Environments	15%	- Data types, structures, and file formats - Data storage systems and platforms - Data lifecycle and data ecosystems
Topic 4: Data Analysis	25%	- Statistical methods and analysis techniques - Data interpretation and reporting - Trend and pattern identification
Topic 5: Visualization	20%	- Chart and dashboard design principles - Data storytelling and reporting tools - Visualization best practices

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CompTIA Data+ Exam 認定 DA0-002 試験問題 (Q59-Q64):

質問 # 59
A data engineer needs to add a process that will run after an employee table is loaded. The engineer does not know the name of the process that loads employee data. Which of the following is the best document for the engineer to review to find this information?

A. Data flow diagram
B. Data dictionary
C. Data lineage report
D. Data explainability report

正解：C

解説：
A data lineage report documents the movement and transformation of data throughout systems and processes. It shows where data originates, how it is processed, and the dependencies between processes. Reviewing the data lineage report would help the engineer identify the process responsible for loading the employee table and determine where to add the subsequent process.

質問 # 60
A data analyst needs to summarize the number of customers who contacted the business in the last year by contact type. The Contact_Type table is in a file and has one million rows. Based on the following sample:

Which of the following is the most efficient for the analyst to use?

A. Query
B. Pivot table
C. Math function
D. Filter

正解：B

解説：
A pivot table is the most efficient tool for summarizing and aggregating large datasets. With one million rows, the analyst can quickly group records by Contact_Type and calculate the count of customers for each contact method (Email, DM, Branch, Call) without creating complex formulas or queries. This provides the required summary directly and efficiently.

質問 # 61
A sales manager wants a dashboard that shows sales aggregated by region and identifies high- volume sales by salesperson per region. Which of the following communication techniques best displays this information?

A. User persona
B. Defined parameters
C. Filter options
D. Level of detail

正解：D

解説：
Level of detail allows data to be aggregated at different granularities, enabling analysis by region while also identifying high-volume sales at the salesperson level within each region.

質問 # 62
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?

A. SELECT firstName, lastName, SUM(income) FROM companyRoster HAVING SUM(income) >
10000000
B. SELECT firstName, lastName, SUM(income) FROM companyRoster
C. SELECT firstName, lastName, SUM(income) FROM companyRoster GROUP BY firstName, lastName
D. SELECT firstName, lastName, SUM(income) FROM companyRoster ORDER BY firstName, income

正解：D

解説：
The error occurs because SORT BY is not valid SQL syntax. To sort query results, SQL uses the ORDER BY clause. Replacing SORT BY with ORDER BY allows the statement to execute correctly and return the results ordered by the specified columns.

質問 # 63
A data company needs a visualization that shows the availability zones from the last ten years and any future availability zones that the company will be using in the next five years. Which of thefollowing is the most appropriate visualization to display this information?

A. Bar chart
B. Mosaic plot
C. Map
D. Pie chart

正解：C

解説：
This question falls under theVisualization and Reportingdomain of CompTIA Data+ DA0-002, focusing on selecting the appropriate visualization for a specific dataset. The task is to show availability zones over a 15- year period (past and future), which involves a geographical element since availability zones are typically location-based.
* Bar chart (Option A): Bar charts are good for comparing categorical data but don't effectively show geographical locations or time-based trends across zones.
* Mosaic plot (Option B): Mosaic plots display relationships between categorical variables, not suitable for geographical or time-series data.
* Map (Option C): A map can display availability zones geographically, with annotations or layers to show changes over time (past 10 years and future 5 years), making it the most appropriate visualization.
* Pie chart (Option D): Pie charts show proportions of a whole, not suitable for geographical or time- based data.
The DA0-002 Visualization and Reporting domain emphasizes "translating business requirements to form the appropriate visualization," and a map is the best choice for displaying geographical availability zones over time.
Reference: CompTIA Data+ DA0-002 Draft Exam Objectives, Domain 4.0 Visualization and Reporting.

質問 # 64
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