Quiz6

What will be the output of the below code?

public static void main(String args[]) {

short number = 32767;

short numberTwo = (short)(number + 1);

System.out .println(numberTwo);

• compilation error: cannot convert from int to short

• 32767

• 32768

• -32768

If an arithmetic expression contains variables of int, byte and short data types, what will be the data type of its result?

• int

• byte

• float

• short

What will be the output of the below code?

public class Tester {

public boolean checkTemp(int temp) / if (temp > 100) (

return true;

} else {

return false;

}

public static void main(String args []) {

Tester tester » new Tester ();

if (tester.checkTemp(110)) {

System.out.println("Data is valid");

else {

System.out.printin("Data is invalid");

• Data is invalid

• Data is valid

• true

• false

public class Tester {

pudlic void demoMethod()

int varone = 1000;

float varTwo = 20.00f;

double varThree = 0.0;

varThree = (double) (varTwo + varone * (7.0 / 100));

System.out.println("varThree:" + varThree);

)

public static void main(String args []) {

Tester tester = new Tester();

tester.demoMethod ();

• varThree:20.0

• varThree:90.0

• varThree:1020.0

• varThree:0.0

What will the output of the below code?

public class Tester {

public int subtract(int a, int b) {

return (a - b);

public static void main(String args[]) {

int a = 10;

int b = 20;

Tester tester = new Tester ();

int res • tester.subtract(b, a);

System.out.print]n(res);

• 0

• -10

• 10

• Compilation error: the name of the formal and actual parameters must be the same

Identify the number of instances and local variables present in the Student class given below.

public class Student {

public int rollNo;

public string studentName;

public void findGrade(int marks) {

char grade;

if (marks > 90)

grade = 'A';

else if (marks < 90 && marks > 80)

grade = 'B';

else if (marks < 80 && marks > 70)

grade = 'C';

else

grade = 'D';

System.out.printIn(grade);

}

• 2 instance variables, 2 local variables

• 3 instance variables, 1 local variables

• 2 instance variables, 1 local variables

• 4 instance variables, 0 local variables

public class Tester {

public int add(int a, int b) {

return (a + b);

}

public static void main(String args []) {

int a = 10;

int b = 20;

int sum = 0;

Tester tester = new Tester ();

tester.add(a, b);

System.out.printIn(sum);

}

}

• 10

• 0

• 20

• 30

Consider the below Circle class.

public class Circle {

public double radius;

Circle(double r) {

radius

= I

which of the following options will create an object for the class?

• Circle c = new Circle (10.5)

• Circle = new Circle(10.5)

• Circle c = new Circle()

• Circle c = new Circle(5.4, 10)

What will be the output of the below code?

public class Tester {

public int nut; public int num2;

Tester (int numi, int num2) {

num1 = num1;

num2 = num2;

)

public static void main(String args []) {

Tester tester = new Tester (20, 40);

System.out.println(tester.num1);

System.out.printIn(tester.num2) ;

}

• compilation error: variables num1 and num2 need to be initialized before use

• garbage value

• 0 0

• 20 40

Which of the following statements are correct?

i. public methods of a class can be etcessed anywhere in a program

ii. private methods of a class can be accessed only inside the class

iii. members created without any access modifier will have default access

• Only i and il

• All i, ii and iii

• Only i and iii

• Only ii and iii