i) Method Signature (2 Marks)
The method signature in Java is a combination of the method name and the parameter list. The parameter list includes the number, types, and order of parameters that the method is going to receive. For example, in a method like `public void add(int a, int b)`, the method signature is `add(int, int)`. It's important to note that the return type is not part of the method signature in Java.

ii) Method Overloading (4 Marks)
Method overloading in Java is a feature that allows a class to have two or more methods having the same name, but different in parameters. This increases the readability of the program. For example, we can have a class like this:

```java
public class Calculation {
void sum(int a, int b){
System.out.println(a+b);
}
void sum(int a, int b, int c){
System.out.println(a+b+c);
}
}
```
In this class, the method `sum` is overloaded with two different parameter lists.

iii) Call by value and Call by reference (4 Marks)
In Java, all primitive types (int, float, boolean, etc.) are passed by value and all objects are passed by reference.

Call by value means that when a method is invoked, a new copy of the value of the argument is passed to the method, and the method cannot modify the original value. For example:

```java
public void modify(int value){
value = value * 2;
}
```
In this case, even if we pass a variable to the `modify` method, the original variable won't be changed.

Call by reference means that when a method is invoked, the reference to the original object is passed to the method, and the method can modify the original object. For example:

```java
public void modify(MyObject obj){
obj.value = obj.value * 2;
}
```
In this case, if we pass an object to the `modify` method, the original object will be changed.

Question

i) Method Signature (2 Marks)
The method signature in Java is a combination of the method name and the parameter list. The parameter list includes the number, types, and order of parameters that the method is going to receive. For example, in a method like `public void add(int a, int b)`, the method signature is `add(int, int)`. It's important to note that the return type is not part of the method signature in Java.

ii) Method Overloading (4 Marks)
Method overloading in Java is a feature that allows a class to have two or more methods having the same name, but different in parameters. This increases the readability of the program. For example, we can have a class like this:

```java
public class Calculation {
   void sum(int a, int b){
      System.out.println(a+b);
   }
   void sum(int a, int b, int c){  
      System.out.println(a+b+c);
   }
}
```
In this class, the method `sum` is overloaded with two different parameter lists.

iii) Call by value and Call by reference (4 Marks)
In Java, all primitive types (int, float, boolean, etc.) are passed by value and all objects are passed by reference.

Call by value means that when a method is invoked, a new copy of the value of the argument is passed to the method, and the method cannot modify the original value. For example:

```java
public void modify(int value){
   value = value * 2;
}
```
In this case, even if we pass a variable to the `modify` method, the original variable won't be changed.

Call by reference means that when a method is invoked, the reference to the original object is passed to the method, and the method can modify the original object. For example:

```java
public void modify(MyObject obj){
   obj.value = obj.value * 2;
}
```
In this case, if we pass an object to the `modify` method, the original object will be changed.

Knowee AI · Accepted Answer