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777dan777 [17]
3 years ago
14

The relation LIBRARY records books currently on loan to students. Each book has one ISBN_NO The library has several copies of ea

ch book. A student may borrow more than one book but may not borrow a book they have already checked out. Assume also that no two library members have the same name.
ISBN_NO STUDENT_NAME STUDENT_ADDRESS
01 Liu Phelps
02 Liu Phelps
02 Holmes Phelps
03 Lopez Hollister
LIBRARY
a) Is LIBRARY in 1NF?
b) Identify candidate key(s)
c) Identify functional dependencies
d) Explain why is LIBRARY not in 2NF?
e) Decompose LIBRARY to comply with 2NF rules.
Computers and Technology
1 answer:
Nataly [62]3 years ago
3 0
I think the answer is E
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Answer:

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4 years ago
Given ProblemSolution class. Use a pointer to object of "ProblemSolution" class to invoke the "CalculateSum" and "Print" methods
faltersainse [42]

Answer:

#include <iostream>

using namespace std;

class  ProblemSolution {

private:

int num1, num2;

public:

ProblemSolution(int n1, int n2) {

 num1 = n1;

 num2 = n2;

}

int calculateSum() {

 int sum = 0;

 sum = num1 + num2;

 return sum;

}

void printSum() {

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 cout <<"Sum = "<< calculateSum();

}

~ProblemSolution() {

 cout << "\nDestructor is called " << endl;

};

};

int main() {

int a, b;

cout << "Enter a: ";

cin >> a;

cout << "Enter b: ";

cin >> b;

// Initiallizing object pointer of type ProblemSolution

ProblemSolution *objPtr = new ProblemSolution(a,b);

// printing Sum

objPtr->printSum();

// delete objPtr to relaease heap memory :important

delete objPtr;

return 0;

}

Explanation:

we will initialize  a pointer "objPtr" and initallize the constructor by passing 2 values a and b followed by the keyword  "new". the keyword "new" allocates memory in the heap. we can access class member functions using arrow "->". it is important to delete objPtr at the end of the program so that the heap memory can be freed to avoid memory leakage problems.  

3 0
3 years ago
When pasting a circle drawn by the presentation software drawing tool into a spreadsheet, that circle will go into the selected
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False.

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3 0
3 years ago
Read 2 more answers
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tatyana61 [14]

Answer:

c. Exponentiation has the highest precedence.

Explanation:

Operator precedence decides how an expression is evaluated. For example, Multiplication has higher precedence than addition, therefore a+b*c will be evaluated as a + (b*c). (expression in bold is evaluated first, then added to a)

Option a is wrong since assignment ( = ) has the lowest precedence, therefore addition and subtraction will be evaluated first.

Option b is wrong since exponentiation is right associative.

Option d is wrong because multiplication can never be unary.

Precedence of basic python operators is listed below (Order Highest to lowest):

1) Exponentiation (**)

2) Multiplication (*) , Division (/), Modulus (%). (Same rank means equal precedence)

3) Addition (+), Subtraction(-)

4 0
4 years ago
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