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svet-max [94.6K]
3 years ago
7

The Hudson Engineering Group (HEG) has contacted you to create a conceptual model whose application will meet the expected datab

ase requirements for its training program. The HEG administrator gives you the following description of the training group's operating environment:
The HEG has 12 instructors and can handle up to 30 trainees per class. HEG offers five "advanced technology" courses, each of which may generate several classes. If a class has fewer than 10 trainees in it, it will be canceled. It is, therefore, possible for a course not to generate any classes. Each class is taught by one instructor. Each instructor may teach up to two classes or may be assigned to do research. Each trainee may take up to two classes per year.

Given this information, do the following:

1. Draw the E-R diagram for HEG.
2. Describe the relationship between instructor and course in terms of connectivity, cardinality, and existence dependence.
3. Explain the difference between single-valued attributes and simple attributes. Give an example of each.

Computers and Technology
1 answer:
alexdok [17]3 years ago
3 0

Answer:

The diagram of the ER and depreciation is in the attachments.

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Write a program that calculates the average rainfall for three months. The program should ask the user to enter the name of each
Eduardwww [97]

Answer:

import java.util.Scanner;

public class ANot {

   public static void main(String[] args) {

   Scanner input = new Scanner(System.in);

       System.out.println("Enter the month name:");

       String month1 = input.next();

       System.out.println("Enter the amount of rain for "+month1);

       double month1Rain = input.nextDouble();

       System.out.println("Enter the second month: ");

       String month2 = input.next();

       System.out.println("Enter the amount of rain for "+month2);

       double month2Rain = input.nextDouble();

       System.out.println("Enter the Third month: ");

       String month3 = input.next();

       System.out.println("Enter the amount of rain for "+month3);

       double month3Rain = input.nextDouble();

       double averageRainfall = (month1Rain+month2Rain+month3Rain)/3;

       System.out.printf("Average Rainfall is: %,.2f  ", averageRainfall);

   }

}

Explanation:

This is written in Java Programming language

  1. Import  the scanner class to prompt user for the inputs (Months and amount of rainfall for each month)
  2. Find the average of the three rainfall amount by adding up and dividing by 3
  3. Output the average. Pay particular attention to the use of java's printf in order to print the average to 2 decimal places
8 0
3 years ago
Define a function typeHistogram that takes an iterator ""it"" (representing a sequence of values of different types) and builds
Alexeev081 [22]

Answer:

def typeHistogram(it,n):

   d = dict()

   for i in it:

       n -=1

       if n>=0:

           if str(type(i).__name__) not in d.keys():

               d.setdefault(type(i).__name__,1)

           else:

               d[str(type(i).__name__)] += 1

       else:

           break

   return list(d.items())

it = iter([1,2,'a','b','c',4,5])

print(typeHistogram(it,7))

Explanation:

  • Create a typeHistogram function that has 2 parameters namely "it" and "n" where "it" is an iterator used to represent a sequence of values of different types while "n" is the total number of elements in the sequence.
  • Initialize an empty dictionary and loop through the iterator "it".
  • Check if n is greater than 0 and current string is not present in the dictionary, then set default type as 1 otherwise increment by 1.
  • At the end return the list of items.
  • Finally initialize the iterator and display the histogram by calling the typeHistogram.
3 0
3 years ago
During data declaration, a name is binded to a memory location, what else can be identify as part of this process?
igomit [66]

data declaration means a variable which contain data value and it can be declared as integer, float, character, double, boolean (data types).

example:

int r;

char name;

float g;

double k= 23.34;

5 0
3 years ago
2. Create 4 riddleson keywords which is related to fire wall.​
Alona [7]

Answer:

It's been so good to have you as a friend:

2. As sweet and rich as honey-colored sun

3. Slanting steep across a summer lawn,

4. Gilding life with all that love can lend.

5. And now that you yourself have griefs to tend,

6. I want to be the strong and caring one

7. To count to you the lovely things you've done

8. Until these troubles pass and sorrows end.

9. You are so beautiful in form and soul

10. That you bring happiness to all you're near:

11. Just as a sea rose, flowering in mist,

12. Makes a paradise of some bleak shoal,

13. Turning truth to something far more clear,

14. No pain unsoothed or rain-swept cheek unkissed.

good~0~as_a_friend . good_to_have~Slanting~lawn .

It's_been~so_good~as_a_friend .

to_have~griefs_to~form_and_soul

Explanation:

7 0
3 years ago
4. When the keyword ____________________ is followed by a parenthesis, it indicates a call to the superclass constructor.
Andreyy89

Answer:

Super

Explanation:

In object-oriented programming (OOP) language, an object class represents the superclass of every other classes when using a programming language such as Java. The superclass is more or less like a general class in an inheritance hierarchy. Thus, a subclass can inherit the variables or methods of the superclass.

Basically, all instance variables that have been used or declared in any superclass would be present in its subclass object.

Hence, when the keyword super is followed by a parenthesis, it indicates a call to the superclass constructor and it should be the first statement declared in the subclass constructor.

5 0
2 years ago
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