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>> Latest CompTIA DA0-002 Exam Papers <<
It is similar to the DA0-002 desktop-based software, with all the elements of the desktop practice exam. This DA0-002 exam can be accessed from any browser and does not require installation. The DA0-002 questions in the mock test are the same as those in the real exam. And candidates will be able to take the web-based DA0-002 Practice Test immediately through any operating system and browsers.
NEW QUESTION # 98
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?
Answer: B
Explanation:
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.
NEW QUESTION # 99
Which of the following situations best describes an unclear and inconsistent column definition that can lead to an enabled analysis process?
Answer: A
Explanation:
An undefined field refers to unclear or inconsistent column definitions that can cause confusion and hinder effective data analysis.
NEW QUESTION # 100
A product goes viral on social media, creating high demand. Distribution channels are facing supply chain issues because the testing and training models that are used for sales forecasting have not encountered similar demand. Which of the following best describes this situation?
Answer: D
Explanation:
This question pertains to theData Analysisdomain, focusing on issues with forecasting models. The scenario describes a sudden change in demand (viral product) that the model couldn't predict because it hasn't seen similar patterns before.
* Model bias (Option A): Model bias occurs when a model systematically favors certain outcomes due to flawed training data, but this scenario is about a change in data patterns, not bias.
* Data drift (Option B): Data drift occurs when the statistical properties of the data change over time (e.
g., sudden high demand due to virality), causing the model to perform poorly because it was trained on different patterns, which fits the scenario.
* Incorrect sizing (Option C): This term is vague and not a standard concept in data analysis for this context.
* Skewing (Option D): Skewing refers to data distribution asymmetry, not a change in data patterns affecting model performance.
The DA0-002 Data Analysis domain includes understanding "applying the appropriate descriptive statistical methods," and data drift is a key concept in forecasting when data patterns change unexpectedly.
Reference: CompTIA Data+ DA0-002 Draft Exam Objectives, Domain 3.0 Data Analysis.
NEW QUESTION # 101
Which of the following data repositories stores unstructured and structured data?
Answer: A
Explanation:
This question falls under theData Concepts and Environmentsdomain of CompTIA Data+ DA0-002, which involves understanding different types of data repositories and their characteristics. The task is to identify a repository that can store both unstructured and structured data.
* Data store (Option A): A data store is a general term for any data repository, but it's not specific enough to confirm it stores both unstructured and structured data.
* Data silo (Option B): A data silo is an isolated data repository, often structured, and not typically designed for unstructured data.
* Data mart (Option C): A data mart is a subset of a data warehouse, focused on structured data for specific business areas, not unstructured data.
* Data lake (Option D): A data lake is a centralized repository that stores raw data in its native format, including both structured (e.g., tables) and unstructured (e.g., text, images) data, making it the correct choice.
The DA0-002 Data Concepts and Environments domain includes understanding "different types of databases and data repositories," and a data lake is specifically designed to handle both unstructured and structured data.
Reference: CompTIA Data+ DA0-002 Draft Exam Objectives, Domain 1.0 Data Concepts and Environments.
NEW QUESTION # 102
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?
Answer: D
Explanation:
Real-time refresh ensures the report is continuously updated with the latest data as changes occur, keeping it always current.
NEW QUESTION # 103
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