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elena-14-01-66 [18.8K]
4 years ago
14

Which of the following is NOT true of constructors? Question 6 options

Computers and Technology
1 answer:
LenKa [72]4 years ago
7 0

Answer:

All are True

Explanation:

a. A constructor must have the same name as that of a class. For example

public class MyFirstClass{  // this is the class name

  public MyFirstClass() } // the constructor having the same name as class.

b. Constructors never have a return type not even void because it is only used to initialize the values of data members of the class when the object of the class is created so constructors are not directly called hence they do not need to have a return type.

c. Constructors are invoked using the new operator.

When the new object is created the constructor is invoked in order to initialize the variables of a class. The memory is allocated to the object and then the constructive is invoked for the purpose to initialize the object.

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Which of the following would be a valid method call for the following method? public static void showProduct (int num1, double n
Alenkinab [10]

Answer:

showProduct(int,double)

for example: showProduct(10,10.5) is the correct answer even showProduct(10,10.0) is also correct but showProduct(10.0,10.5) or showProduct(10,10) or showProduct(10.0,10) are wrong calls.

Explanation:

The code is

  1.       <em>public static void showProduct (int num1, double num2){</em>
  2. <em>       int product;</em>
  3. <em>       product = num1*(int)num2;</em>
  4. <em>       System.out.println("The product is "+product);</em>
  5. <em>       }</em>

showProduct is function which asks for two arguments whenever it is called, first one is integer and second one is of type double which is nothing but decimal point numbers. Generally, in programming languages, 10 is treated as integer but 10.0 is treated as decimal point number, but in real life they are same.

If showProduct( 10,10.0) is called the output will be 'The product is 100'.

Strange fact is that, if you enter showProduct(10,10.5) the output will remain same as 'The product is 100'. This happens because in the 3rd line of code,which is <em>product=num1*(int)num2</em>, (int) is placed before num2 which makes num2 as of type integer, which means whatever the value of num2 two is given, numbers after decimal is erased and only the integer part is used there.

This is necessary in JAVA and many other programming languages as you <u>cannot</u><u> multiply two different datatypes</u> (here one is int and another is double). Either both of them should be of type int or both should be of type double.

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3 years ago
Viết chương trình hoàn chỉnh các yêu cầu sau:
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Explanation:

the perimeter of an aluminium sheet is 120 CM if its length is reduced by 10% and its breadth is increased by 20% the perimeter does not change find the measure of the length and the breadth of the sheet

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mixer [17]

Answer:

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Explanation:

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How do I turn of the noise canceling feature on my beats studio wireless?
zysi [14]
You press and hold the "b" button on your left earmuff, but you have to hold it down as long as you want ANC (Automatic Noise Cancelling) to be turned off, in other words, as soon as you release the button, ANC will be turned back on. Unfortunately, this will also mute your music. 
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A word or line of a paragraph at the bottom of the page indent is called _______
sashaice [31]

Answer:

Orphan

Explanation:

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                              It is a  paragraph-opening sentence or word appearing  at the bottom of a column or page by itself,and it remain separated from the remaining text or paragraph.

                              Orphans and widows are not desirable and must be avoided while writing text.

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