SQA National 5 Computing Science Practice Exam

A variable in programming is defined as a storage location in memory that has a name and can hold a value. This definition encompasses the key aspects of what a variable does in a program.

When you declare a variable, you essentially create a named location in the computer's memory where you can store data. This storage can hold different types of values, such as integers, floating-point numbers, or strings, and can be modified throughout the program's execution. The name assigned to the variable acts as a reference to that particular memory location, making it easier for programmers to manage and manipulate data within their code.

The other options highlight concepts that do not accurately represent what a variable is. A fixed storage location would imply that the data cannot change, which contradicts the fundamental behavior of variables. Describing a variable as a type of programming construct is too vague and doesn't capture its specific function of holding data. Finally, a collection of code libraries refers to a set of reusable code that aids in programming rather than a single element like a variable. Thus, recognizing that a variable is a named storage location capable of holding changing values is crucial for understanding its role in programming.