In many programming languages, an access modifier designates what?

• A. A keyword used to declare variables.
• B. A type of loop control statement.
• C. A syntax for creating anonymous functions.
• D. A keyword such as public or private that designates access to a class and parts of a class.

Answer: (D)

The concept being tested is how access modifiers control who can see and use a class’s members. Keywords like public and private label a member with an access level, dictating its visibility from other parts of the program. When a member is public, it can be accessed from anywhere that can reference the class. When it’s private, only code inside that class can access it. This is why describing access modifiers as designating access to a class and its parts is the best fit—they’re about gatekeeping access to the class’s internals, not about declaring variables, controlling loops, or creating anonymous functions.