# Quiz Discussion

What is the value stored in x in the following lines of Java code?

   int x, y, z;
x = 0;
y = 1;
x = y = z = 8;
Course Name: Java

• 1]

0

• 2]

1

• 3]

9

• 4]

8

##### Solution
No Solution Present Yet

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# Quiz
1
Discuss

What will be the output of the following Java code?

    class Output
{
public static void main(String args[])
{
boolean a = true;
boolean b = false;
boolean c = a ^ b;
System.out.println(!c);
}
}

• 1]

0

• 2]

1

• 3]

true

• 4]

false

##### Solution
2
Discuss

On applying Left shift operator, <<, on integer bits are lost one they are shifted past which position bit?

• 1]

1

• 2]

32

• 3]

33

• 4]

31

##### Solution
3
Discuss

What will be the output of the following Java program?

    class Output
{
public static void main(String args[])
{
int a = 1;
int b = 2;
int c;
int d;
c = ++b;
d = a++;
c++;
b++;
++a;
System.out.println(a + " " + b + " " + c);
}
}

• 1]

3 2 4

• 2]

3 2 3

• 3]

2 3 4

• 4]

3 4 4

##### Solution
4
Discuss

Which of these statements are incorrect?

• 1]

Equal to operator has least precedence

• 2]

Brackets () have highest precedence

• 3]

Division operator, /, has higher precedence than multiplication operato

• 4]

Addition operator, +, and subtraction operator have equal precedence

##### Solution
5
Discuss

Which of these statements are incorrect?

• 1]

The left shift operator, <<, shifts all of the bits in a value to the left specified number of times

• 2]

The right shift operator, >>, shifts all of the bits in a value to the right specified number of time

• 3]

The left shift operator can be used as an alternative to multiplying by 2

• 4]

The right shift operator automatically fills the higher order bits with 0

##### Solution
6
Discuss

What will be the output of the following Java program?

    class bitwise_operator
{
public static void main(String args[])
{
int var1 = 42;
int var2 = ~var1;
System.out.print(var1 + " " + var2);
}
}

• 1]

42 42

• 2]

43 43

• 3]

42 -43

• 4]

42 43

##### Solution
7
Discuss

Which operator is used to invert all the digits in a binary representation of a number?

• 1]

~

• 2]

<<<

• 3]

>>>

• 4]

^

##### Solution
8
Discuss

What will be the output of the following Java program?

    class Modulus
{
public static void main(String args[])
{
double a = 25.64;
int  b = 25;
a = a % 10;
b = b % 10;
System.out.println(a + " "  + b);
}
}

• 1]

5.640000000000001 5

• 2]

5.640000000000001 5.0

• 3]

5 5

• 4]

5 5.640000000000001

##### Solution
9
Discuss

What will be the output of the following Java code?

    class operators
{
public static void main(String args[])
{
int x = 8;
System.out.println(++x * 3 + " " + x);
}
}

• 1]

24 8

• 2]

24 9

• 3]

27 8

• 4]

27 9

##### Solution
10
Discuss

Which of these lines of Java code will give better performance?

   1. a | 4 + c >> b & 7;
2. (a | ((( 4 * c ) >> b ) & 7 ))
• 1]

1 will give better performance as it has no parentheses

• 2]

2 will give better performance as it has parentheses

• 3]

Both 1 & 2 will give equal performance

• 4]

Dependent on the computer system

# Quiz