Which term describes a value or memory location that does not change during program execution?

• A. Variable
• B. Pointer
• C. Array
• D. Constant

Answer: (D)

Constant describes a value or memory location that does not change during program execution. This immutability distinguishes it from a variable, which represents storage that can be updated with new values. A pointer is a variable that holds a memory address and can be redirected to different data, so it isn’t inherently fixed. An array is a fixed-size collection of elements, and while its contents can be modified unless declared read-only, the term itself doesn’t imply the absolute non-changeability of the data. Declaring something as a constant prevents reassignment and often enables the compiler to optimize by using the fixed value directly.