Free Practice Questions for CompTIA DA0-001 Exam

A dashboard with a scheduled delivery is an efficient way to provide a quick view of test performance. It allows for timely updates, which is crucial given that the superintendent needs the information promptly at the end of each month. The ability to filter scores by school enables the superintendent to easily segment and analyze the data as needed. Bar charts are effective for comparison and can visually communicate the performance across different schools or other categories, making it easier to identify trends and outliers at a glance.

Access control is a critical aspect of database security. The best method for controllingwho can access financial databased onjob rolesisRole-Based Access Control (RBAC).

Option A (Role-based):Correct.RBAC assigns permissions based on a user’s role within the organization (e.g., accountants can access financial data, but sales representatives cannot).

Option B (Rule-based):Incorrect. Rule-Based Access Control (RuBAC) enforces policies based on rules, such as time restrictions, rather than user roles.

Option C (Discretionary):Incorrect. Discretionary Access Control (DAC) allows individual users to grant permissions, which can lead to security risks in financial systems.

Option D (Group-based):Incorrect. Group-Based Access Control (GBAC) assigns permissions based on user groups, but RBAC provides finer control for financial functions.

The purpose of an executive summary is to provide a concise and informative overview of a longer report, allowing busy stakeholders to quickly understand the key points and findings without reading the entire document. This summary should highlight the most important data, conclusions, and recommendations, and is typically placed at the beginning of the report for easy access12.

In the context of a detailed sales report for senior management, including a summary section with observations and insights would allow the team to quickly grasp the performance across various offices and identify any significant trends or issues that require attention. This approach aligns with best practices for executive reporting, which emphasize the importance of clear and concise summaries that focus on essential KPIs and actionable insights12.

The best answer is A. JSON is quicker to read and write.

JSON (JavaScript Object Notation) is a lightweight data-interchange format that is based on the JavaScript programming language and easy to understand and generate. JSON uses a simple syntax that consists of name-value pairs and arrays, and does not require any end tags or attributes. JSON is quicker to read and write than XML (Extensible Markup Language), which is a markup language that uses a tag structure to represent data items.XML has a more complex and verbose syntax that requires end tags, attributes, and namespaces123

A derived variable is created through mathematical computations or transformations from existing data. In this case, "income per day" is derived by combining multiple existing variables​.

 Alphanumeric values are values that contain both letters and numbers, such as A3J7. Theother options are numeric values, as they contain only numbers, such as 10.1E2, 13.6, and 1347. Reference: Guide to CompTIA Data+ and Practice Questions - Pass Your Cert

ETL stands for Extract, Transform, Load, which are the three fundamental steps in the data integration process:

Extract:Retrieving data from various source systems.

Transform:Cleaning and converting the extracted data into a suitable format or structure for analysis.

Load:Inserting the transformed data into a target database or data warehouse.

Option A:Reviewing and addressing missing values

Rationale:During theTransformphase of the ETL process, data is cleansed and prepared for analysis. This includes reviewing and addressing missing values to ensure data quality and consistency. Handling missing data is crucial, as it can impact the accuracy of analyses and decision-making.