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Back to Question 13

Answer 12

C. -0.010999999999999996

Explanation 12

Modulus operator can be used with floating types

In this case, the program returns the remainder that would be produced by dividing a double value of -0.11 by a double value of 0.033 and terminating thedivide operation at the beginning of the fractional part of the quotient.

Say that again

Stated differently, the result of the modulus operation is the remainder that results after

  • subtracting the right operand from the left operand an integral number of times, and
  • terminating the repetitive subtraction process when the result of the subtraction is less than the right operand

Modulus result is not exact

According to my hand calculator, taking into account the fact that the left operand is negative, this operation should produce a modulus result of-0.011. As you can see, the result produced by the application of the modulus operation to floating types is not exact.

Back to Question 12

Answer 11

B. Runtime Error

Explanation 11

Integer modulus involves integer divide

The modulus operation with integer operands involves an integer divide.

Therefore, it is subject to the same kind of problem as an ordinary integer divide when the right operand has a value of zero.

Program produces a runtime error

In this case, the program produced a runtime error that terminated the program. The error produced by JDK 1.3 is as follows:

Exception in thread "main" java.lang.ArithmeticException: / by zero at Worker.doMod(Ap020.java:14)at Ap020.main(Ap020.java:6)

Dealing with the problem

As with integer divide, you can either test the right operand for a zero value before performing the modulus operation, or you can deal with the problemafter the fact using try-catch.

Back to Question 11

Answer 10

D. -2

Explanation 10

What is a modulus operation?

In elementary terms, we like to say that the modulus operation returns the remainder that results from a divide operation.

In general terms, that is true.

Some interesting behavior

However, the modulus operation has some interesting behaviors that are illustrated in this and the next several questions.

This program returns the modulus of -11 and 3, with -11 being the left operand.

What is the algebraic sign of the result?

Here is a rule:

The result of the modulus operation takes the sign of the left operand, regardless of the sign of the quotient and regardless of the sign of theright operand. In this program, that produced a result of -2.

Changing the sign of the right operand would not have changed the sign of the result.

Exercise care with sign of modulus result

Thus, you may need to exercise care as to how you interpret the result when you perform a modulus operation having a negative left operand.

Back to Question 10

Answer 9

C. Infinity

Explanation 9

Floating divide by zero

This program attempts to divide the double value of 11 by the double value of zero.

No runtime error with floating divide by zero

In the case of floating types, an attempt to divide by zero does not produce a runtime error. Rather, it returns a value that the println method interprets and displays as Infinity.

Questions & Answers

what is math number
Tric Reply
x-2y+3z=-3 2x-y+z=7 -x+3y-z=6
Sidiki Reply
Need help solving this problem (2/7)^-2
Simone Reply
what is the coefficient of -4×
Mehri Reply
the operation * is x * y =x + y/ 1+(x × y) show if the operation is commutative if x × y is not equal to -1
Alfred Reply
An investment account was opened with an initial deposit of $9,600 and earns 7.4% interest, compounded continuously. How much will the account be worth after 15 years?
Kala Reply
lim x to infinity e^1-e^-1/log(1+x)
given eccentricity and a point find the equiation
Moses Reply
12, 17, 22.... 25th term
Alexandra Reply
12, 17, 22.... 25th term
College algebra is really hard?
Shirleen Reply
Absolutely, for me. My problems with math started in First grade...involving a nun Sister Anastasia, bad vision, talking & getting expelled from Catholic school. When it comes to math I just can't focus and all I can hear is our family silverware banging and clanging on the pink Formica table.
I'm 13 and I understand it great
I am 1 year old but I can do it! 1+1=2 proof very hard for me though.
Not really they are just easy concepts which can be understood if you have great basics. I am 14 I understood them easily.
find the 15th term of the geometric sequince whose first is 18 and last term of 387
Jerwin Reply
I know this work
The given of f(x=x-2. then what is the value of this f(3) 5f(x+1)
virgelyn Reply
hmm well what is the answer
If f(x) = x-2 then, f(3) when 5f(x+1) 5((3-2)+1) 5(1+1) 5(2) 10
how do they get the third part x = (32)5/4
kinnecy Reply
make 5/4 into a mixed number, make that a decimal, and then multiply 32 by the decimal 5/4 turns out to be
can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
okay, so you have 6 raised to the power of 2. what is that part of your answer
I don't understand what the A with approx sign and the boxed x mean
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
I'm not sure why it wrote it the other way
I got X =-6
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
oops. ignore that.
so you not have an equal sign anywhere in the original equation?
is it a question of log
I rally confuse this number And equations too I need exactly help
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Commplementary angles
Idrissa Reply
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salut. from Algeria
A soccer field is a rectangle 130 meters wide and 110 meters long. The coach asks players to run from one corner to the other corner diagonally across. What is that distance, to the nearest tenths place.
Kimberly Reply
Jeannette has $5 and $10 bills in her wallet. The number of fives is three more than six times the number of tens. Let t represent the number of tens. Write an expression for the number of fives.
August Reply
What is the expressiin for seven less than four times the number of nickels
Leonardo Reply
How do i figure this problem out.
how do you translate this in Algebraic Expressions
linda Reply
why surface tension is zero at critical temperature
I think if critical temperature denote high temperature then a liquid stats boils that time the water stats to evaporate so some moles of h2o to up and due to high temp the bonding break they have low density so it can be a reason
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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