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tatiyna
2 years ago
11

1. In the Entity-Relationship Model, relationships can have attributes.

Computers and Technology
1 answer:
Vladimir [108]2 years ago
5 0

Answer:

1. A. True

2. A. True

3. B. Conceptual.

4. Three (3).

Explanation:

An Entity-Relationship Model is used in databases to describe the structure and relationship between data elements known as entities.

1. True: In the Entity-Relationship Model, relationships can have attributes.

2. True: Attributes are the smallest division of data in ER diagram.

3. Conceptual: the level of abstraction which the Entity-Relationship Model most concerned with.

4. Consider the following relationship involving two entities, students and classes: A student can take many classes. A class can be taken by many students. The number of tables which can be used to represent this relationship in a schema is 3 because we are having three (3) parameters which are simply the students and the two entities.

In database management, the term "schema" is used to denote a representation of data.

A database schema is a structure which is typically used to represent the logical design of the database and as such represents how data are stored or organized and the relationships existing in a database management system. There are two (2) main categories of a database schema; physical database schema and logical database schema.

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2 years ago
The Spinning Jenny reduced the number of workers necessary to _______. a.remove cotton seeds from fibers b.pump water from the m
bazaltina [42]

The answer is D: Turn yarn into cloth.

During the industrial revolution, a number of new inventions in the textile industry greatly impacted this industry. However, it was the invention of the Spinning Jenny that is credited a lot. It helped move the textile industry from homes to factories and made wool spinning easier and faster. This invention, however, impacted the labor workforce. It reduced the amount of work needed to produce yarn. One worker was able to work 8 or more spools at once and rose to 120 due to technological advancements.

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2 years ago
What best describes the purpose of the Recycle Bin (Microsoft Windows) and Trash (Apple Mac) features
alexandr1967 [171]
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7 0
2 years ago
Read 2 more answers
What is the value of x after each of the following statements is encountered in a computer program, if x=1 before the statement
steposvetlana [31]

Answer:

x=2

x=1

x=2

Explanation:

a)

This if statement if (1+2=3) checks if the addition of two numbers 1 and 2 is true. Here the addition of 1 and 2 is 3 which is true. So the condition becomes true.

Since the condition is true x:=x+1 statement is executed. This statement means that the value of x is incremented by 1.

The value of x was 1 before the if statement is reached. So x:=x+1 statement will add 1 to that value of x.

x:=x+1 means x=x+1 which is x=1+1 So x=2

Hence value of x is 2 (x=2) after the execution of x:=x+1

b)

In statement b the value of x will be 1 because both the mathematical operations in the if statement evaluate to false.

which means in b, x:=x+1 will not be executed and value of x remains unchanged i.e x=1

In (c) the value x will be 2 because the condition in the if statement is true. Both mathematical expressions 2+3=5 and 3+4=7 are true. Therefore x:=x+1 will be executed and value of x will be incremented by 1. Hence x=2

5 0
2 years ago
Write a C program that right shifts an integer variable 4 bits. The program should print the integer in bits before and after th
Sindrei [870]

Solution :

#include<$\text{stdio.h}$>

#include<conio.h>

void dec_bin(int number) {

$\text{int x, y}$;

x = y = 0;

for(y = 15; y >= 0; y--) {

x = number / (1 << y);

number = number - x * (1 << y);

printf("%d", x);

}

printf("\n");

}

int main()

{

int k;

printf("Enter No u wanted to right shift by 4 : ");

scanf("%d",&k);

dec_bin(k);

k = k>>4; // right shift here.

dec_bin(k);

getch();

return 0;

}

4 0
1 year ago
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