Tableau 面接の質問と回答

質問 1. What is Tableau?

Tableau is a data visualization and business intelligence tool that allows users to connect, visualize, and share data in a way that provides insights and facilitates decision-making.

質問 2. Explain the difference between a Live connection and an Extract in Tableau.

A Live connection directly queries the data source in real-time, while an Extract creates a snapshot of the data that is stored in Tableau's proprietary format (.hyper) for faster performance.

質問 3. What is a calculated field in Tableau?

A calculated field is a user-defined field that performs computations on the existing fields in the data source. It allows users to create new data based on the existing data in the dataset.

Example:

Example: Profit Margin = (Profit / Sales) * 100

質問 4. How can you filter data in Tableau?

Data can be filtered in Tableau using various techniques such as Quick Filters, Context Filters, and Top N filters. Users can also create calculated fields for more advanced filtering.

質問 5. Explain the difference between a worksheet and a dashboard in Tableau.

A worksheet is a single chart or map, while a dashboard is a collection of sheets arranged on a single canvas. Dashboards are used to combine multiple visualizations to tell a more comprehensive story.