Which of the following is equivalent to a subroutine depending on the programming language?

a. accessor

b. mutator

c. model

d. function

d. function

The correct answer is:

d. function

The correct answer is d. function.

In programming languages, a subroutine is a sequence of instructions that performs a specific task and can be used repeatedly throughout a program. It is typically defined separately from the main code and can be called or invoked whenever needed.

In the given options, a function is the equivalent concept to a subroutine. A function is a self-contained block of code that performs a specific task and can be called or invoked by its name from different parts of a program.

To determine the correct answer, you can eliminate options a, b, and c because an accessor, mutator, and model are not directly equivalent to a subroutine. An accessor is a method or function that retrieves or accesses a value or property of an object. A mutator is a method or function that modifies or mutates the state of an object. A model refers to the representation of data and behavior in certain programming paradigms or frameworks.

Therefore, the correct equivalent to a subroutine is a function (option d).