Identify the invalid identifier from the following:

The size of '\n' is:

1. 2 bytes
2. 4 bytes
3. 8 bytes
4. 16 bytes

Consider the following program segment in which the statements are jumbled, choose the correct order of statements to swap two variables using the third variable.

void swap(int a, int b)
{	
  a = b;      → (1)
  b = t;      → (2)
  int t = 0;  → (3)
  t = a;      → (4)
}

1. (1) (2) (3) (4)
2. (3) (4) (1) (2)
3. (1) (3) (4) (2)
4. (2) (1) (4) (3)

Assertion (A): The boolean data type in Java can have only two possible values: true or false.

Reason (R): Boolean values in Java are stored as integers, with true represented by 1 and false by 0.