IBM Data Science Practice Test 2025 – Comprehensive Exam Prep

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What is the main purpose of data visualization tools like Tableau or Power BI?

To create complex databases

To manipulate raw data into complex coding formats

To create interactive and easy-to-understand visual representations of data

The primary function of data visualization tools such as Tableau and Power BI is to transform raw data into interactive and visually appealing representations, making it easier for users to analyze and comprehend complex datasets. These tools allow users to create various types of visual content, such as graphs, charts, and dashboards, which facilitate quick insights and help in conveying information effectively to different audiences.

By using visual elements, users can spot trends, patterns, and outliers much more effectively than when reviewing raw data in tables or text format. This capability enhances data-driven decision-making, as stakeholders can interpret and analyze results visually, improving engagement and understanding of the underlying data without needing extensive technical expertise in data handling or coding.

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To store large amounts of data securely

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