Tableau 面接の質問と回答
質問 6. What is the purpose of Tableau Prep?
Tableau Prep is a data preparation tool that allows users to clean, shape, and combine data for analysis in Tableau. It helps in preparing data by handling tasks like cleaning, splitting, and aggregating data.
質問 7. How can you create a dual-axis chart in Tableau?
To create a dual-axis chart, drag a second measure to the right of the existing axis. Then, right-click on the second axis and select 'Dual Axis.' This allows for the comparison of two measures with different scales on the same chart.
質問 8. Explain the concept of aggregation in Tableau.
Aggregation in Tableau refers to the process of combining data at a higher level to provide a summary. Functions like SUM, AVG, MIN, and MAX are examples of aggregations that can be applied to measures in Tableau.
質問 9. What is the difference between a dimension and a measure in Tableau?
A dimension is a categorical field that defines the discrete data points, while a measure is a quantitative field that provides the values to be analyzed. Dimensions are typically used on the rows and columns shelf, while measures are used in the data pane for analysis.
質問 10. How can you create a map in Tableau?
To create a map in Tableau, drag a geographical dimension (like Country or State) to the Rows or Columns shelf. Tableau will automatically recognize the geographical data and generate the map. You can then drag measures to the color or size shelf for further customization.
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