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BigorU [14]
4 years ago
6

Consider the classes below, declared in the same file: class A { int a; public A() { ​ a = 7; } } class B extends A { int b; pub

lic B() { ​ b = 8; } } Which of the statements below is false? Group of answer choices After the constructor for class B executes, the variable a will have the value 7. A reference of type A can be treated as a reference of type B. Both variables a and b are instance variables. After the constructor for class B executes, the variable b will have the value 8.
Computers and Technology
1 answer:
DiKsa [7]4 years ago
4 0

Answer:

2. <em>A reference of type A can be treated as a reference of type B</em> - False

Base class or its objects are not related to their derived class (or its objects).

Explanation:

class A {

   int a;

   public A() {

       a = 7;

   }

}

class B extends A {

   int b;

   public B() {

       b = 8;

   }

}

///////////////////////////////////////////////////////////////////////////////////////////////////////

1. <em>After the constructor for class B executes, the variable a will have the value 7 </em>- True.

When an object of a derived class is declared, the constructor of base class is called before the constructor of derived class (is called).

3. <em>Both variables a and b are instance variables </em>- True.

Classes can have instance, or member, variables and methods.

4.<em> After the constructor for class B executes, the variable b will have the value 8</em> - True.

When object of class B is declared, its constructor was called, which initialized variable b to 8.

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Do you think our attitude (whether positive or negative) is something we are born with or that we have power to control within o
maks197457 [2]

Answer:

Yes. I do believe that having a positive attitude about our current situation helps with over coming the struggles of it all.

Explanation:

i once had a negative out look on this online school but now that we've reached the end (at my school I've recognized it wasn't too bad after all while doing the work I've learned it helps to listen to some music or watch an video or two from one of my favorite you-tubers and also talking to my friends through apps.

hope this helps.

8 0
3 years ago
Read 2 more answers
Prompt the user to input an integer, a double, a character, and a string, storing each into separate variables. Then, output tho
katen-ka-za [31]

Answer:

import java.util.Scanner;

public class BasicInput {

   public static void main(String[] args) {

       //Create an object of the Scanner class

       Scanner scnr = new Scanner(System.in);

       

       //Define int and double variables

       int userInt;

       double userDouble;

       

       //Define char and string variables similarly

       char userChar;

       String userString;

       

       //Prompt the user to enter an integer

      System.out.println("Enter integer:");

       //Store the input in the integer variable

       userInt = scnr.nextInt();

       

       //Prompt the user to enter a double

        System.out.println("Enter double:");

       //Store the input in the double variable

      userDouble = scnr.nextDouble();

       

       //Prompt the user to enter a char

        System.out.println("Enter char:");

       //Store the input in the char variable

      userChar = scnr.next().charAt(0);

       

       //Prompt the user to enter a string

        System.out.println("Enter String:");

       //Store the input in the string variable

      userString = scnr.next();

       

       //Output the four values on a single line

       //separated by a space

       System.out.println(userInt + " " + userDouble + " " + userChar + " " + userString);

       

   }

   

}

Sample Output:

Enter integer:

>>12

Enter double:

>>23

Enter char:

>>s

Enter String:

>>asdasd

12 23.0 s asdasd

Explanation:

The code above has been written in Java. It contains comments explaining every part of the code. Please go through the comments.

5 0
3 years ago
Discuss the types of data that business might collect and how the business could use that data to drive decision-making in a spe
Rudik [331]

Answer:

Answered below

Explanation:

A business such as an online store like Amazon can collect user data like name, address, mouse clicks on products, how long users stay on page viewing a particular product, marital status, education and many more.

These data are used by these businesses to drive decision-making that enhances the sale of their goods. For instance, adverts and search alternatives about a particular good can be shown to people who have looked at them before. A newly married or pregnant woman would be shown baby products etc.

3 0
3 years ago
Write a program that prints the Grade based on the given data. 95-100: A+ 90-94: A 80-89: B+ 70-79: B 60-69: C+ 50-59: C &lt;49
mr Goodwill [35]

Answer:

The program to this question as follows:

Program:

score=int(input("Enter your percentage: ")) #input grade by user

#using conditional statement for match condition  

if 95<=score <= 100: #if value in between 95 to 100

   grade = 'A+' #assign grade

elif 90 <=score <= 94: #elif value in between 90 to 94

   grade = 'A' #assign grade

elif 80 <=score <= 89:  #elif value in between 80 to 89

   grade = 'B+' #assign grade

elif 70 <=score <= 79:  #elif value in between 70 to 79

   grade = 'B' #assign grade

elif 60 <=score <= 69:  #elif value in between 60 to 69

   grade = 'C+' #assign grade

elif 50 <=score <= 59:  #elif value in between 50 to 59

   grade = 'C' #assign grade

elif score<49 :  #elif value is less then 49

   grade = 'F' #assign grade

print (grade) #print grade

Output:

Enter your percentage: 50

C

 Explanation:

In the above python code, a variable "score" is defined, this variable is used for taking value from the user end. In the next step if-elif-else conditional statement is used, this statement is used when a group of statements is given in which one is true. The if block check score value is between 95-100 if this is true it will print A+.

In elif block if the above condition is not true, then this condition will execute, in this block, there are multiple elif block is used that can be described as follows:

  • In the first block, if the value in between 90-94. It will print A.
  • In the second block, if the value in between 80-89. It will print B+.
  • In the third block, if value in between 70-79. It will print B.
  • In the fourth block, if value in between 60-69. It will print C+.
  • In the fifth block, if value in between 50-59. It will print C.
  • In the last, if the value of the score is less then 49. It will print F.
8 0
3 years ago
Write a program to calculate the total salary of the employees in an office. The program will first prompt the user to enter the
raketka [301]

Answer:

import java.util.Scanner;

public class Salary

{

public static void main(String[] args) {

   

    int numberOfEmployees;

    double payRate, numberOfHours, totalPay = 0;

       Scanner input1 = new Scanner(System.in);

       Scanner input2 = new Scanner(System.in);

       System.out.print("Enter the number of employees: ");

       numberOfEmployees = input1.nextInt();

       

       for(int i=1; i<=numberOfEmployees; i++) {

           System.out.print("Enter the pay rate for employee " + i + ": ");

           payRate = input2.nextDouble();

           System.out.print("Enter the number of hours worked: ");

           numberOfHours = input2.nextDouble();

           

           totalPay += (payRate * numberOfHours);

       }

       

       System.out.println("Total payment is: "+ totalPay);

}

}

Explanation:

- Declare the variables

- Ask the user the for the number of employees

- Inside the for loop, ask the user for pay rate and hours worked for each employee

- Calculate the total pay

- <u>Outside of the loop</u>, print the total pay

6 0
3 years ago
Read 2 more answers
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