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Answer 26

Question 27

True or False? The class that begins in Listing 5 does not have an access modifier. This puts it in package-private access category. A class with package-private access can be accessed by codethat is stored in the same package and cannot be accessed by code stored in other packages.

Answer 27

Question 28

True or False? The last three statements in Listing 5 declare three private variables. Because these variables are declared private, they can be accessed by any method defined in any class in thesame package.

Answer 28

Question 29

True or False? The three variables declared in Listing 5 are instance variables as opposed to class variables .

Answer 29

Question 30

True or False? Because the three variables declared in Listing 5 are instance variables, they belong to an object instantiated from the class. Even if the variables were public, they could onlybe accessed by first gaining access to the object to which they belong.

Answer 30

Question 31

True or False? The three variables declared in Listing 5 are reference variables . This means that they are capable of storing references to objects and are also capable of storing values of the eightprimitive types.

Answer 31

Question 32

True or False? Ericson's class library contains a class named World and another class named Turtle . The code in Listing 5 instantiates one object of the World class and populates that world with three objects of the Turtle class.

Answer 32

Question 33

True or False? Every class definition has one or more method-like members called constructors. (If you don't define a constructor when you define a class, a default constructor will be automatically defined for your class.)

Answer 33

Question 34

True or False? The name of the constructor must always be the same as the name of the class in which it is defined. Like a method, a constructor may ormay not take arguments. If there are two or more (overloaded) constructors, they must have different argument lists.

Answer 34

Question 35

True or False? To instantiate an object of a class, you apply the new operator to the class' constructor, passing parameters that satisfy the requiredarguments for the constructor.

Answer 35

Question 36

True or False? When an object is instantiated, the constructor returns an array containing the values in all of the instance variables.

Answer 36

Question 37

True or False? The last two statements in Listing 5 instantiate two objects of the Turtle class and use them to populate the World object whose reference is stored in the variable named mars .

Answer 37

Question 38

True or False? If a variable (exclusive of local variables inside of methods) is not purposely initialized when the object in instantiated, it will receive a default initialization value. The default values are:

  • 0 or 0.0 for numeric variables
  • true for boolean variables
  • null for reference variables

Answer 38

Question 39

True or False? Code written into a class' constructor is executed when an object of the class is instantiated.

Answer 39

Question 40

True or False? Good object-oriented programming practice says that most of the instance variables encapsulated in an object should be declared private. Ifthere is a need to make the contents of those variables available outside the object, that should be accomplished by defining protected accessor methods.

Questions & Answers

can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
ninjadapaul
20/(×-6^2)
Salomon
okay, so you have 6 raised to the power of 2. what is that part of your answer
ninjadapaul
I don't understand what the A with approx sign and the boxed x mean
ninjadapaul
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
Salomon
I'm not sure why it wrote it the other way
Salomon
I got X =-6
Salomon
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
ninjadapaul
oops. ignore that.
ninjadapaul
so you not have an equal sign anywhere in the original equation?
ninjadapaul
Commplementary angles
Idrissa Reply
hello
Sherica
im all ears I need to learn
Sherica
right! what he said ⤴⤴⤴
Tamia
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
Kevin Reply
a perfect square v²+2v+_
Dearan Reply
kkk nice
Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
Kim
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Al
y=10×
Embra Reply
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
Nancy Reply
rolling four fair dice and getting an even number an all four dice
ramon Reply
Kristine 2*2*2=8
Bridget Reply
Differences Between Laspeyres and Paasche Indices
Emedobi Reply
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
Mary Reply
is it 3×y ?
Joan Reply
J, combine like terms 7x-4y
Bridget Reply
im not good at math so would this help me
Rachael Reply
yes
Asali
I'm not good at math so would you help me
Samantha
what is the problem that i will help you to self with?
Asali
how do you translate this in Algebraic Expressions
linda Reply
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
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
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
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
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Object-oriented programming (oop) with java. OpenStax CNX. Jun 29, 2016 Download for free at https://legacy.cnx.org/content/col11441/1.201
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