Explore topic-wise MCQs in Java Programming.

public class dynamic_initialize 
 {
 public static void main(String args[]) 
 {
 double p, q;
 p = 4.5;
 q = 10.0;
 double r = Math.sqrt(p * p + q * q);
 System.out.println(r);
 } 
 }

public class scope_var
 {
 public static void main(String args[]) 
 {
 int a;
 a = 5;
 {
 int b = 6;
 System.out.print(a + " " + b);
 }
 System.out.println(a + " " + b);
 } 
 }

public class arr_var
 {
 public static void main(String args[]) 
 {
 int array_var [] = new int[20];
 for (int i = 0; i < 20; ++i) {
 array_var[i] = i/2;
 array_var[i]++;
 System.out.print(array_var[i] + " ");
 i++;
 }
 
 } 
 }

public class output
 {
 public static void main(String args[]) 
 {
 int p[] = {5,6,7,8,9};
 int q[] = p;
 int sum = 0;
 for (int j = 0; j < 4; ++j)
 sum += (p[j] * q[j + 1]) + (p[j + 1] * q[j]);
 System.out.println(sum);
 } 
 }