How many times will the following loop execute? What value will be returned?

int x = 2;
int y = 50;
do{
++x;
y -= x++;
}
while(x <= 10);
return y;

Write the output of the following String methods:

(a) "ARTIFICIAL".indexOf('I')

(b) "DOG and PUPPY".trim().length()

Predict the output of the following code snippet:

String a = "20";
String b = "23";
int p = Integer.parseInt(a); 
int q = Integer.parseInt(b); 
System.out.print(a + "*" + b);

When there is no explicit initialization, what are the default values set for variables in the following cases?

(a) Integer variable

(b) String variable