OOAD Quiz 4

What will be the output of the following code?

public class DataTypeQuiz {

public static void main(String[] args) {

int x = 5;

int y = 10;

int result = (x++ y--) - (--x ++y);

System.out.println(result);

}

}

• 0

• 25

• 30

• 20

What is the default value of a 'char' variable in Java?

• '0'

• '\u0000'

• ' ' (space)

• 'null'

What will be the output of the following code?

public class ArrayQuiz {

public static void main(String[] args) {

int[] numbers = new int[5];

System.out.println(numbers[2]);

}

}

• 0

• 2

• garbage value

• null

Which of the following is NOT a valid Java array declaration?

• int[] numbers = new int[5];

• int[] numbers = {1, 2, 3, 4, 5};

• int numbers[] = new int[5];

• int numbers[5];

What will be the output of the following code?

public class OperatorQuiz {

public static void main(String[] args) {

int x = 5;

int y = 10;

int z = x++ + ++y;

System.out.println("z = " + z);

System.out.println("x = " + x);

System.out.println("y = " + y);

}

}

• z = 16, x = 6, y = 11

• z = 15, x = 5, y = 11

• z = 16, x = 6, y = 10

• z = 15, x = 6, y = 10

What is the output of the following code?

public class ControlFlowQuiz {

public static void main(String[] args) {

int x = 5;

int y = 10;

if (x != 5 && y > 5) {

System.out.println("Condition is true");

} else {

System.out.println("Condition is false");

}

}

}

• Condition is true

• Condition is false

• Compilation error

• Runtime error

What will be the output of the following code?

public class OperatorQuiz {

public static void main(String[] args) {

int x = 5;

int y = 10;

int result = x * y / (x + y);

System.out.println("Result: " + result);

}

}

• Result: 2

• Result: 3

• Result: 0

• Result: 1

Which of the following statements is true about the switch statement in Java?

• The switch statement can be used to switch between different data types, such as int, float, and String.

• The switch statement can have multiple default cases.

• The break statement is not required in each case block.

• The switch statement is primarily used for complex conditional logic.

What will be the output of the following code?

public class ArrayQuiz {

public static void main(String[] args) {

int[] numbers = {2, 4, 6, 8};

int sum = 0;

for (int i : numbers) {

sum += i;

}

System.out.println("Sum: " + sum);

}

}

• Sum: 10

• Sum: 20

• Sum: 30

• Compilation error

What is the result of the following code?

int[] arr1 = {1, 2, 3};

int[] arr2 = {1, 2, 3};

System.out.println(arr1 == arr2);

• true

• false

• Compilation error

• Runtime error