Java Programming Questions and Answers

What gets displayed on the screen when the following program is compiled and run. Select the one correct answer.

public class test {
	public static void main(String args[]) {
		int x,y;
		x = 1 & 7;
		y = 3 ^ 6;
		System.out.println(x + " " + y);
	}
}

What gets displayed on the screen when the following program is compiled and run. Select the one correct answer.

public class test {
	public static void main(String args[]) {
		int x,y;
		x = 3 & 5;
		y = 3 | 5;
		System.out.println(x + " " + y);
	}
}

What gets printed when the following program is compiled and run. Select the one correct answer.

public class test {
	public static void main(String args[]) {
		byte x = 3;
		x = (byte)~x;
		System.out.println(x);
	}
}

Which operator is used to perform bitwise inversion in Java. Select the one correct answer

What gets printed on the standard output when the class below is compiled and executed. Select the one correct answer.

public class ShortCkt {
	public static void main(String args[]) {
		int i = 0;
		boolean t = true;
		boolean f = false, b;
		b = (t | ((i++) == 0));
		b = (f | ((i+=2) > 0));
		System.out.println(i);		
	}
}

What gets printed on the standard output when the class below is compiled and executed. Select the one correct answer.

public class ShortCkt {
	public static void main(String args[]) {
		int i = 0;
		boolean t = true;
		boolean f = false, b;
		b = (t || ((i++) == 0));
		b = (f || ((i+=2) > 0));
		System.out.println(i);		
	}
}

What gets printed on the standard output when the class below is compiled and executed. Select the one correct answer.

public class ShortCkt {
	public static void main(String args[]) {
		int i = 0;
		boolean t = true;
		boolean f = false, b;
		b = (t & ((i++) == 0));
		b = (f & ((i+=2) > 0));
		System.out.println(i);		
	}
}

What gets printed on the standard output when the class below is compiled and executed. Select the one correct answer.

public class ShortCkt {
	public static void main(String args[]) {
		int i = 0;
		boolean t = true;
		boolean f = false, b;
		b = (t && ((i++) == 0));
		b = (f && ((i+=2) > 0));
		System.out.println(i);		
	}
}

What gets printed when the following program is compiled and run. Select the one correct answer.

class test {
	public static void main(String args[]) {
		int i,j,k,l=0;
		k = l++;
		j = ++k;
		i = j++;
		System.out.println(i);		
	}
}

In the following class definition, which is the first line (if any) that causes a compilation error. Select the one correct answer.

public class test {
	public static void main(String args[]) {
		char c;
		int i;
		c = 'A';		// 1
		i = c;		//2
		c = i + 1;	//3
		c++;		//4
	}
}