Alteryx Foundation Micro-Credential Practice Exam

What are two different datatypes of decimal numbers?

1. Float and Int32

2. Float and Double

3. Int16 and Int64

4. Byte and Double

The correct answer is: Float and Double

The selection of Float and Double as two different datatypes of decimal numbers is accurate because both represent numbers that can contain a fractional part, but they differ in terms of precision and the range of values they can store. Float, also known as single precision, typically uses 32 bits to store a number, which allows for a fairly good representation of decimal values but with limited precision. This means that while Floats can represent a wide range of values, they may not capture very detailed decimal fractions accurately. On the other hand, Double, or double precision, uses 64 bits to store the number. This allows for a much larger range and greater precision in its representation of decimal values. As such, Double is often used in programming scenarios where high precision is critical, such as in scientific computations. In contrast, the other combinations listed do not serve as different datatypes for decimal representation. Int32, Int16, and Int64 are integer types and do not accommodate decimal values. Similarly, Byte is also an integer type used for whole numbers ranging from 0 to 255, thus not suitable for decimal numbers. Thus, Float and Double are the only types represented in the answer that specifically pertain to decimal numbers in computing.