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Answers

Answer 15

C. -3 2

Explanation 15

String concatenation

This program uses String concatenation, which has not been previously discussed in this group of self-assessment modules.

In this case, the program executes both an integer divide operation and an integer modulus operation, using String concatenation to display both results on a single line of output.

Quotient = -3 with a remainder of 2

Thus, the displayed result is the integer quotient followed by the remainder.

What is String concatenation?

If either operand of the plus (+) operator is of type String , no attempt is made to perform arithmetic addition. Rather, the other operand isconverted to a String , and the two strings are concatenated.

A space character, " "

The string containing a space character (" ") in this expression appears as the right operand of one plus operator and as the left operand of the other plusoperator.

If you already knew about String concatenation, you should have been able to figure out the correct answer to the question on the basis of the answers toearlier questions in this module.

Back to Question 15

Answer 14

D. NaN

Explanation 14

Floating modulus operation involves floating divide

The modulus operation with floating operands and 0.0 as the right operand produces NaN , which stands for Not a Number .

What is the actual value of Not a Number?

A symbolic constant that is accessible as Double.NaN specifies the value that is returned in this case.

Be careful what you try to do with it. It has some peculiar behavior ofits own.

Back to Question 14

Answer 13

D. 1.5499999999999996

Explanation 13

A totally incorrect result

Unfortunately, due to floating arithmetic inaccuracy, the modulus operation in this program produces an entirely incorrect result.

The result should be 0.0, and that is the result produced by my hand calculator.

Terminates one step too early

However, this program terminates the repetitive subtraction process one step too early and produces an incorrect remainder.

Be careful

This program is included here to emphasize the need to be very careful how you interpret the result of performing modulus operations on floating operands.

Questions & Answers

Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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