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If x=3, y=4 what is the value of this Java expression? (double) (x/y) What is the...

If x=3, y=4 what is the value of this Java expression?

(double) (x/y)

What is the value of this Java expression?

(int)(1.0 / 2.0) + (double)(1 / 2)

True or False:

(double)(x)/y is the same as double (x/y)

What is the value of this Java expression?

(double)3  

Solutions

Expert Solution

Q1

If x=3, y=4 what is the value of this Java expression?

(double) (x/y)

The value will be 0.0 because first the expression x/y is evaluated as integer then 3/4 because x and y both are integers there will be no upcasting. Hence it will be equal to 0

Q2

What is the value of this Java expression?

(int)(1.0 / 2.0) + (double)(1 / 2)

Similar to above the value will be 0+ 0.0 = 0 because the 1.0 and 2.0 both are floats and the result will be 0.5 which is downcasted to int and results in 0 and 1/2 also becomes 0 because of integer division

Q3

(double)(x)/y is the same as double (x/y)

False as typecasting will be done before division in first case and in the second case after the division which can lead to different results as in case of x=1 and y=2

First will yield 0.5 and second will yield 0

Q4

What is the value of this Java expression?

(double)3  

3.0 as it is typecasted to a double

venereology answered 2 hours ago
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