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CompTIA DA0-002 Prüfungsplan:

ThemaEinzelheiten
Thema 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.
Thema 2
  • 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.
Thema 3
  • 5.0 Data Governance, Quality, and Controls

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CompTIA Data+ Exam DA0-002 Prüfungsfragen mit Lösungen (Q159-Q164):

159. Frage
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?

Antwort: B

Begründung:
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.


160. Frage
A Chief Executive Officer requests a report that must:
* Summarize the company metrics in a simple way.
* Be clear and concise.
* Be easily understood by all company levels.
* Be accessible and updated without manual intervention.
Which of the following communication approaches best meets these requirements?

Antwort: B

Begründung:
This question pertains to theVisualization and Reportingdomain, focusing on selecting the appropriate communication method for a report. The requirements emphasize simplicity, clarity, accessibility, and automatic updates, which point to a specific approach.
* Executive summary (Option A): An executive summary is a written document that summarizes metrics but isn't typically updated automatically and may not be accessible toall levels without distribution.
* Slide presentation (Option B): A slide presentation can be clear but requires manual updates and isn't inherently accessible to all company levels.
* Key performance indicator dashboard (Option C): A KPI dashboard provides a simple, visual summary of metrics, is clear and concise, can be understood by all levels, and can be set up to update automatically, meeting all requirements.
* Open data portal (Option D): An open data portal provides raw data access, which may not be simple or easily understood by all levels.
The DA0-002 Visualization and Reporting domain emphasizes "translating business requirements to form the appropriate visualization," and a KPI dashboard is the best approach for meeting these requirements.
Reference: CompTIA Data+ DA0-002 Draft Exam Objectives, Domain 4.0 Visualization and Reporting.


161. Frage
A data analyst is reviewing a new data source that contains employee IDs, job titles, dates of birth, addresses, years of service, and employees' birth months. Which of the following inconsistencies should the analyst identify?

Antwort: B

Begründung:
Redundancy occurs when the same information can be derived from other data already present in the dataset. Since the data source contains both dates of birth and employees' birth months, the birth month is redundant because it can be extracted directly from the date of birth.


162. Frage
Which of the following best describes the method used to combine files, software, and libraries for use on various operating systems and environments?

Antwort: D

Begründung:
This question pertains to theData Concepts and Environmentsdomain, focusing on methods for managing software and data environments. The task is to identify a method that combines files, software, and libraries for use across different systems.
* Package manager (Option A): Package managers (e.g., npm) manage software dependencies but don't combine files and libraries for cross-system use.
* Code repository (Option B): Code repositories (e.g., GitHub) store code but don't package it for deployment across environments.
* Virtual machine (Option C): Virtual machines emulate entire operating systems, which is heavier than needed for combining files and libraries.
* Containerization (Option D): Containerization (e.g., Docker) packages files, software, and libraries into a container that can run consistently across different operating systems and environments, making it the best choice.
The DA0-002 Data Concepts and Environments domain includes understanding "data environments," and containerization is a standard method for ensuring consistency across systems.
Reference: CompTIA Data+ DA0-002 Draft Exam Objectives, Domain 1.0 Data Concepts and Environments.


163. Frage
Which of the following best represents a type of infrastructure that requires a company to purchase and maintain all of its own servers?

Antwort: B

Begründung:
A private infrastructure requires the organization to own, manage, and maintain its own servers and hardware, unlike cloud or hybrid models where resources are shared or hosted externally.


164. Frage
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