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Answer 9 .

D. 6.0

Explanation 9

Declare and initialize two local variables

This program declares and initializes two local variables, one of type double and the other of type int . Each variable is initialized with the integer value 3.

Automatic conversion to floating type double

However, before the value of 3 is stored in the double variable, it is automatically converted to type double .

Automatic conversion in mixed-type arithmetic

Numeric addition is performed on the two variables. Whenever addition is performed between a floating type and an integer type, the integer type isautomatically converted to a floating type and floating arithmetic is performed.

A floating result

This produces a floating result. When this floating result is passed to the println method for display, a decimal point and a zero are displayed to indicate a floating type, even though in this case, the fractional part of theresult is zero.

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Answer 8 .

A. Compiler Error

Explanation 8

Initialize boolean variable to true

This program declares and initializes a boolean variable with the value true . Then it attempts to add the literal value 1 to the value stored in the boolean variable named myVar .

Arithmetic with boolean values is not allowed

As mentioned earlier, unlike C++, boolean types in Java cannot participate in arithmetic expressions.

Therefore, this program will not compile. The compiler error produced by this program under JDK 1.3 reads partially as follows:

Ap007.java:13: operator + cannot be applied to int,boolean System.out.println(1 + myVar);

Back to Question 8

Answer 7 .

D. false

Explanation 7

Format for variable initialization

This program declares a local boolean variable and initializes it to the value true . All variables, local or otherwise, can be initialized in this manner provided that the expression on the right of the equal sign evaluates toa value that is assignment compatible with the type of the variable. (I will have more to say about assignment compatibility in a future module) .

Value is changed before display

However, before calling the println method to display the initial value of the variable, the program uses the assignment operator (=) to assign the value false to the variable. Thus, when it is displayed, the value is false .

Back to Question 7

Answer 6 .

A. Compiler Error

Explanation 6

A local boolean variable

In this program, the primitive variable named myVar is a local variable belonging to the method named printBoolean .

Local variables are not automatically initialized

Unlike instance variables, if you fail to initialize a local variable, the variable is not automatically initialized.

Cannot access value from uninitialized local variable

If you attempt to access and use the value from an uninitialized local variable before you assign a value to it, you will get a compiler error.The compiler error produced by this program under JDK 1.3 reads partially as follows:

Ap005.java:13: variable myVar might not have been initialized System.out.println(myVar);

Questions & Answers

What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
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.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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