You need to create a new column in your custom Branches Dataverse table. The table contains the current financial information for every division in the company. The new column should store the total revenue from outstanding contracts per division. Related to Branches, the Contracts table stores details for each contract. 
What should be the type of the new column?

Answer options:

A.Whole number
B.Choices
C.Calculation
D.Decimal number
E.Rollup

Correct Answer: E 
Microsoft Dataverse provides special column types for calculations and data aggregation. These types are Calculation and Rollup. The Calculation column allows users to define a formula based on the column value. This type includes columns from the same table and related parent table in a many-to-one relationship. Calculated columns are read-only. Users benefit from a list of built-in functions for the calculated values and operate on the different data types like text, numeric, and date-time. The calculations run synchronously when a record is saved. 
The Rollup column is like the Calculated type. They operate only with the numeric (Whole Number, Decimal Number, and Currency) and date-time datatypes. The Rollup type includes columns from the same table and related child tables in a one-to-many relationship. The list of built-in functions for the Rollup column is smaller compared to the Calculated columns. It includes sum, min, max, and count. Rollup columns are read-only. By default, the calculations for the Rollup column run once per hour. Users can change the frequency in Customization settings for the table. It is an asynchronous operation. Options A, B, C and D are incorrect because the Whole number, Choices, and Decimal number are the data types but not the column types.
For more information about The Dataverse Calculated and Rollup columns, please visit the below URLs: 

https://docs.microsoft.com/en-us/learn/modules/create-define-calculation-rollup-fields/2-rollup
https://docs.microsoft.com/en-us/powerapps/maker/data-platform/define-rollup-fields
https://docs.microsoft.com/en-us/learn/modules/create-define-calculation-rollup-fields/3-calculation