Google Data Analytics Professional Certification Practice Test

Which type of data representation involves a predefined relationship between elements?

1. Unstructured data

2. Structured data

3. Continuous data

4. Nominal data

The correct answer is: Structured data

Structured data involves a predefined relationship between elements, which means that it is organized in a highly defined manner. This type of data typically fits into a fixed format or model, often found in databases and spreadsheets, where each piece of information is categorized and stored in a specific way that is easily searchable and analyzable. For example, data in a table consists of rows and columns, where each column represents a specific attribute (such as age, name, or address), and each row represents a unique record. This organization allows for effective querying and analysis using structured query languages (like SQL), providing clarity and enhancing the ability to conduct statistical analyses or generate reports. In contrast, unstructured data does not have a predefined format and includes types like text documents, images, and videos, which lack the organized framework necessary for straightforward analysis. Continuous data refers to numerical data that can take on an infinite number of values within a given range, while nominal data is a categorical type of data that cannot be ordered or ranked. These distinctions illustrate why structured data is characterized by its predefined relationships among its elements, allowing for more efficient data management and analysis.