DA0-002題庫，DA0-002考試證照綜述

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CompTIA DA0-002 考試大綱：

主題簡介
主題 1
  • 5.0 Data Governance, Quality, and Controls
主題 2
  • This section of the exam measures skills of a Data Governance Associate and introduces principles for keeping data secure, accurate, and compliant. It covers access controls, encryption, classification of sensitive data like PII and PHI, and legal requirements tied to data use. Candidates must know how to apply quality checks, validate data, and manage master data effectively. It also addresses best practices for maintaining integrity through data dictionaries, audits, and standardisation processes.
主題 3
  • 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.
主題 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.

>> DA0-002題庫 <<

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最新的 CompTIA Data+ DA0-002 免費考試真題 (Q99-Q104):

問題 #99
A data analyst needs to use one table's data to refine data selection from a second table. Which of the following is the most efficient way?

答案：D

解題說明：
A subquery allows the analyst to use the result of one query to filter or refine the data returned from another table, making it efficient for conditional data selection based on another dataset.


問題 #100
Which of the following data repositories stores unformatted data in its original, raw form?

答案：B


問題 #101
A data analyst is creating a pivot table for a large dataset for an upcoming board meeting. Which of the following is the purpose of the pivot table?

答案：C

解題說明：
This question pertains to theData Analysisdomain, focusing on the purpose of a pivot table. Pivot tables are a tool for summarizing and analyzing data, often used in preparation for reporting.
* To visualize the data in a dashboard (Option A): Pivot tables summarize data but aren' tvisualizations; charts in dashboards might be created from pivot tables.
* To retrieve and clean data from several sources (Option B): Retrieving and cleaning data is part of data preparation, not the purpose of a pivot table.
* To summarize and analyze the data (Option C): Pivot tables aggregate and summarize data (e.g., by calculating sums, averages) and allow for analysis (e.g., filtering, grouping), which is their primary purpose.
* To organize the data for reporting (Option D): While pivot tables can help organize data, their main purpose is summarization and analysis, not just organization.
The DA0-002 Data Analysis domain includes "applying the appropriate descriptive statistical methods," and pivot tables are a key tool for summarizing and analyzing large datasets.
Reference: CompTIA Data+ DA0-002 Draft Exam Objectives, Domain 3.0 Data Analysis.


問題 #102
After a database upgrade, a report using datetime calculations does not complete due to an arithmetic overflow error. Which of the following is the best way for a data analyst to troubleshoot the issue?

答案：D

解題說明：
Arithmetic overflow in datetime calculations typically occurs when the data type cannot handle the computed value, so verifying that the columns use appropriate datetime or numeric data types is the most effective way to troubleshoot the issue.


問題 #103
An analyst needs to combine the following two tables. The analyst needs to keep all the records in the Medals table and only the records that match from the Country table.

Which of the following methods should the analyst use for this task?

答案：A

解題說明：
A join is used to combine rows from two tables based on a common field, in this case Person_ID.
Since all records from the Medals table must be retained and only matching records from the Country table included, the appropriate operation is a left join, which is a type of join.


問題 #104
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