Question

Which of the following method is used to allow data to be modified by others in Java?

• A. tutator
• B. messor
• C. mutator
• D. accessor

Hint:

{Mutator methods} modify data, while {Accessor methods} retrieve data from objects.

Answer 1

The Correct Option is C

Step 1: Understanding methods in Object-Oriented Programming.
In Java and other Object-Oriented Programming languages, methods are used to access and manipulate the data stored inside objects. These methods help maintain data security and control how the internal data of a class is accessed or modified.
Step 2: Types of commonly used methods.
Two important types of methods related to object data are:
Accessor methods: These methods are used to read or retrieve the value of variables. They are often called getter methods.
Mutator methods: These methods are used to modify or change the value of variables. They are commonly called setter methods.
Step 3: Role of mutator methods.
A mutator method allows other parts of the program to modify the value of an object's data member. This controlled modification ensures proper data management while still maintaining encapsulation.
Example:
public void setAge(int age)
\{
this.age = age;
\}
Here, the method changes the value of the variable age.
Step 4: Evaluation of options.
(A) tutator: Incorrect. This is not a valid programming term.
(B) messor: Incorrect. This is not a recognized method type.
(C) mutator: Correct. It modifies the value of an object's data.
(D) accessor: Incorrect. Accessor methods only retrieve values but do not modify them.
Step 5: Conclusion.
Thus, the method used to allow data to be modified in Java is called a Mutator Method.
Final Answer: mutator