Question

30. Suppose sum and num are int variables, and the input is 15 18 20 -1

What is the output of the following code? (Assume that console is a scanner object initialized to the standard input device.)

sum = console.nextInt();

num = console.nextInt();

while (num != -1) {

num = console.nextInt();

sum = sum + num;

}

System.out.println(sum);

a. 34 b.35 c.52 d.53

57. Which of the following statements would you use to declare the reference variable secretObject of type Secret and instantiate the object such that the value of the data member x is 7 and the value of the data member z is 10?

a. Secret secretObject = new Secret (7, 10);

b. Secret secretObject = new Secret (10, 7);

c. Secret secretObject(7);

d. Secret.secretObject(10);

Answer 1

30) a)34

Reason:

Initially

sum=15

num=18

In while loop as 18!=-1

num=20

sum=15+20

In while loop as 20!=-1

num=-1

sum=35-1

Hence, sum has 34

57) a) Secret secretObject = new Secret (7, 10);

Reason:

Assuming that x is followed by z in the class,

we instantiate the object with data members as

classname objname = new classname(values);

So, from available options a) is the correct answer

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