Java Foundation_1

What is the result of the following program?

public class MathFunctions {

public static void addToInt(int x, int amountToAdd) {

x = x + amountToAdd;

}

public static void main(String[] args) { var a = 15;

var b = 10;

MathFunctions.addToInt(a, b); System.out.println(a); } }

• 10

• 15

• 25

• Compile Error

What is the correct signature of the main method in Java?

• public static void main(String[] args)

• public void main(String[] args)

• private static void main(String[] args)

• public static void main()

Which of the following is a valid way to declare an array in Java?

• int[] arr = new int[5];

• int arr[] = new int(5);

• int arr = new int[5];

• array int arr = new int[5];

What will be the output of the following code?

public class Test {

public static void main(String[] args) {

String str = "Hello";

str.concat(" World");

System.out.println(str);

}

}

• Hello

• Hello World

• Compile Error

• Runtime Error

What is the output of the following code snippet?

public class Example {

public static void main(String[] args) {

int x = 10;

if (x > 5) {

x += 5;

} else {

x -= 5;

}

System.out.println(x);

}

}

• 5

• 10

• 15

• Compile Error

What is the output of the following program? (Choose all that apply.)

interface HasTail { int getTailLength(); }

abstract class Puma implements HasTail {

protected int getTailLength() { return 4; } }

public class Cougar implements HasTail {

public static void main(String[] args) { var puma = new Puma();

System.out.println(puma.getTailLength());

}

public int getTailLength(int length) { return 2; } }

• 2

• 4

• Code will not compile

• Output cannot be determined

What will be the output of the following code?

public class Example {

public static void main(String[] args) {

int a = 5;

int b = 10;

System.out.println(a + b);

}

}

• 5

• 10

• 15

• Compile Error

What is the output of the following code snippet?

public class Test {

public static void main(String[] args) {

String str = "Java";

str = str.toUpperCase();

System.out.println(str);

}

}

• java

• Java

• JAVA

• Compile Error

Predict the output

• 1-11-2

• 3.0-11.0-2

• 3.0-13.0-3

• 3.0f-12-2

• 1

• 2

• 3

• 4