Final answer:
First semester grades are typically expressed in letters and would be categorized as a string data type. However, the poll counting the number of classes would involve integer data types.
Step-by-step explanation:
The grades you receive in your first semester would be categorized as data types. These grades are typically represented by letters (A, B, C, D, or F), and sometimes pluses or minuses are added (A+, A-, etc.). Hence, the data type for grades would be a string, as they consist of characters and not just numerical values.
In the context of your poll about the number of classes students are taking, the data collected can be viewed as both categorical and numerical. However, since you are asking about the actual number classes, which are represented by whole numbers without decimal points or fractions, this data would be classified as an integer data type.