Operators in Java

An operator taking only single operand for its operation is called ...........

Which one of the following is not a binary operator?

Which one of the following is not a valid operator in Java?

The statement i = i + 1 is equivalent to ...........

For x = 5, the statement sum = ++x + 8 evaluates to ...........

The statement (1>0) && (1<0) evaluates to ...........

The statement (1>0) || (1<0) evaluates to ...........

The statement (1==1)? 1: 0 evaluates to ...........

The expression 13 % 3 gives the output ...........

The expression 13 / 3 gives the output ...........

The statement System.out.println("six " + 3 + 3); gives the output ...........

The expression 4 + 8 % 2 gives the output ...........

Arithmetic operators + and - also have a unary form.
True

Operators = and == perform the same operation in Java.
False

The expression 10 % 4 evaluates to 2.
True

The expression 3 / 4 evaluates to 0.
True

The expressions 3 + 4 and "3" + "4" evaluate to the same value.
False

The expression x = x + 7 is same as x =+ 7.
False

The new operator allocates memory during runtime.
True

The statements x = 7 and x == 7 are same.
False

The expression z =- 7 is same as z = z-7.
False

The assignment operator (=) is a binary operator.
True

What are logical operators? Give an example of each.

What is an assignment operator? Give an example.

Explain the shorthand assignment operator with an example.

What is the use and syntax of a ternary operator?

State the difference between = and ==.

If a = 5, b = 9, calculate the value of:
    a += a++ - ++b + a

If x = 3, y = 7, calculate the value of:
x -= x++ - ++y

What will be the output of the following if x=5?
i. 5 * ++x
ii. 5 * x++

What is type conversion? How is an implicit type conversion different from explicit type conversion?

What do you understand by type conversion?

What is typecasting in Java? Give an example.

What are precedence and associativity?

Evaluate the following expressions, if the values of the variables are a = 2, b = 3 and c = 3

i. a - (b++) * (--c)

ii. a * (++b) %c

Write the Java expressions for the following:

i. (a + b)² + b

Rewrite the following statements without using shorthand operators.

a. p /= q
b. p -= 1
c. p *= q + r
d. p -= q - r

Determine the output of the following program.

public class Test
{
    public static void main(String[] args) 
    {
        int a = 1, b = 2;
        System.out.println("Output1: " + a + b);
        System.out.println("Output2: " + (a + b));
    }
}

Output1: 12
Output2: 3

What is the difference between the following two statements? Explain the results.
x -= 5;
x =- 5;

What is concatenation? On which data type is concatenation performed?

Determine the output of the following program.

public class PredictOutput1
{
  public static void main(String args[])
  {
       int a = 4, b = 2, c = 3;
       System.out.println("Output 1: " + (a = b * c));
       System.out.println("Output 2: " + (a = (b * c)));
  }
}

Output 1: 6
Output 2: 6

Determine the output of the following program.

public class PredictOutput2
{
  public static void main(String args[])
  {
       int a = 6, b = 2, c = 3;
       System.out.println("Output 1: " + (a == b * c)); 
       System.out.println("Output 2: " + (a == (b * c)));
  }
}

Output 1: true
Output 2: true

Determine the output of the following program.

public class PredictOutput3
{
  public static void main(String args[])
  {
       int a = 2, b = 2, c = 2;
       System.out.println("Output 1: " + (a + 2 < b * c)); 
       System.out.println("Output 2: " + (a + 2 < (b * c)));
  }
}

Output 1: false
Output 2: false