What is scope in programming?

• A. The region of code where a variable is defined and accessible; global vs local.
• B. The maximum memory a program can use.
• C. The order in which statements are executed.
• D. The process of compiling code to machine language.

Answer: (A)

Scope is about where a variable can be accessed in a program. It determines visibility: a globally defined variable can be used from anywhere after its declaration, while a locally defined variable is only usable inside the function or block where it was created. Many languages also create a new scope for blocks, so a variable inside a specific block may not be accessible outside it. When the code uses a name, the lookup starts in the most tightly enclosing scope and moves outward until it finds a match. This lets you reuse names in different parts of a program without conflicts and prevents unintended interactions between different parts of the code. This concept isn’t about memory limits, execution order, or the process of turning code into machine language; it’s about where names are valid and usable. For example, a global variable can be read anywhere, while a local variable inside a function cannot be accessed outside that function.