Milestone 1 - Assignments, Expression, Operators

Which one of the below expression is equivalent to 16>>2 ?

• 16/4

• 16/2

• 16*2

• 16/2^2

Which of the following is correct?

• 8>> 2 gives 2

• 16 >>> 2 gives 2

• 4 << 2 gives 2

• 2 << 1 gives 2

Given the following code snippet:

double sum = 10.0, price=100;

sum += price>=100 ? price*1.1 : price;

What value is placed in sum? Choose the most appropriate answer.

• 90

• 100

• 110

• 120

Given the variables defined below:

int one = 1;

int two = 2;

char initial = ‘2’;

boolean flag = true;

Which one of the following is invalid?

• if( one == two ){}

• switch( one ){}

• switch( flag ){}

• switch( initial ){}

public class TestOperator {

public static void main(String[] args)

{

byte x = 0x0F;

byte y = 0x08;

byte z = x & y;

System.out.println(z);

}

}

What is the result?

• 8

• 15

• 23

• Compilation error

public class TestExpression {

private static int value=0;

private static boolean method2(int k)

{

value+=k;

return true;

}

public static void method1(int index)

{

boolean b;

b = index >= 15 && method2(30);

b = index >= 15 & method2(15);

}

public static void main ( String args[])

{

method1(0);

System.out.println(value);

}

}

What is the output?

• 0

• 15

• 30

• 45

Given:

public class TestOperator

{

int x=15;

public void method(int x)

{

x+=x;

System.out.println(x);

}

public static void main(String... args)

{

TestOperator t = new TestOperator();

t.method(10);

}

}

What is the output of the above code?

• 10

• 20

• 25

• 30

public class Test {

public static void main(String[] args)

{

System.out.println( 6 ^ 4);

}

}

What is the output?

• 1296

• 24

• 2

• Compilation error

public class TestOperator {

public static void main(String[] args)

{

int x = 0x04;

int y = 0x20;

int z = x && y;

System.out.println(z);

}

}

What is the result?

• 0

• 24

• 36

• Compilation error

public class TestIncrement {

public static void main(String[] args)

{

int index=10;

int result=0;

if (++index > 10)

{

result = index;

}

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

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

}

}

What is the output?

• index=10 result=0

• index=11 result=0

• index=11 result=10

• index=11 result=11