a __________ uses software and/or hardware to prevent unwanted access to a computer or computer system.

9.1.3: Printing vector elements with a for loop. Write a for loop to print all NUM_VALS elements of vector courseGrades, followi

svlad2 [7]

Answer:

The program to this question as follows:

Program:

#include <iostream> //defining header file

#include <vector> //defining header file

using namespace std;

int main() //defining main method

{

//defining integer variable NUM_VALS and i.

int NUM_VALS = 4,i;//assign value in NUM_VALS variable

vector<int> courseGrades(NUM_VALS); //defining vector array

cout<<"Input values: "; //print message

for(i=0;i<NUM_VALS;i++) //loop for input value

{

//input value in verctor array

cin>>courseGrades[i]; //input from user-end

}

for (i = 0; i < NUM_VALS; i++) //loop to print value

{

cout<<courseGrades[i]<< " ";//print value

}

cout << endl;//for new line

for (i = NUM_VALS-1;i >= 0;i--)//loop to print value in reverse order

{

//print value in reverse order

cout << courseGrades[i] << " "; //print value

}

cout << endl; //for new line

return 0;

}

Output:

Input values: 2

3

5

6

2 3 5 6

6 5 3 2

Explanation:

In the above-given code two integer variable "NUM_VALS and i" is declared, in which variable "NUM_VALS" assigns a value, that is 4, in the next step, a vector array "courseGrades" is defined, in which we take input from the user end.

In the next step two for loop is declared, in the first loop we simply print the value of the "courseGrades".
The second loop is also used to print the "courseGrades" value but, in the reverse order.

8 0

3 years ago

The information provided in text aids can help us to understand a text’s content before we even read it.

dimaraw [331]

It is true that the information provided in text aids can help us to understand a text's content before we even read it.
These text aids will contain bits and pieces from the text, which will make us understand the overall message even before we actually get down to going through the text itself. I believe it is better to actually read the text, and try to understand it on your own, before going to these aids for help.

7 0

3 years ago

What is the purpose of the Zoom dialog box? to put the selected range in ascending order in a query to put the selected range in

AlekseyPX

The zoom dialog box helps to enter text and expressions in tight places, such as a property sheet or Query Design view. You can resize the zoom box and change the font. And the zoom box remembers the size and font each time you use it.

Use the

5 0

3 years ago

Read 2 more answers

[1] Please find all the candidate keys and the primary key (or composite primary key) Candidate Key: _______________________ Pri

AVprozaik [17]

Answer:

Check the explanation

Explanation:

1. The atomic attributes can't be a primary key because the values in the respective attributes should be unique.

So, the size of the primary key should be more than one.

In order to find the candidate key, let the functional dependencies be obtained.

The functional dependencies are :

Emp_ID -> Name, DeptID, Marketing, Salary

Name -> Emp_ID

DeptID -> Emp_ID

Marketing -> Emp_ID

Course_ID -> Course Name

Course_Name -> Course_ID

Date_Completed -> Course_Name

Closure of attribute { Emp_ID, Date_Completed } is { Emp_ID, Date_Completed , Name, DeptID, Marketing, Salary, Course_Name, Course_ID}

Closure of attribute { Name , Date_Completed } is { Name, Date_Completed , Emp_ID , DeptID, Marketing, Salary, Course_Name, Course_ID}

Closure of attribute { DeptID, Date_Completed } is { DeptID, Date_Completed , Emp_ID,, Name, , Marketing, Salary, Course_Name, Course_ID}

Closure of attribute { Marketing, Date_Completed } is { Marketing, Date_Completed , Emp_ID,, Name, DeptID , Salary, Course_Name, Course_ID}.

So, the candidate keys are :

{ Emp_ID, Date_Completed }

{ Name , Date_Completed }

{ DeptID, Date_Completed }

{ Marketing, Date_Completed }

Only one candidate key can be a primary key.

So, the primary key chosen be { Emp_ID, Date_Completed }..

2.

The functional dependencies are :

Emp_ID -> Name, DeptID, Marketing, Salary

Name -> Emp_ID

DeptID -> Emp_ID

Marketing -> Emp_ID

Course_ID -> Course Name

Course_Name -> Course_ID

Date_Completed -> Course_Name

3.

For a relation to be in 2NF, there should be no partial dependencies in the set of functional dependencies.

The first F.D. is

Emp_ID -> Name, DeptID, Marketing, Salary

Here, Emp_ID -> Salary ( decomposition rule ). So, a prime key determining a non-prime key is a partial dependency.

So, a separate table should be made for Emp_ID -> Salary.

The tables are R1(Emp_ID, Name, DeptID, Marketing, Course_ID, Course_Name, Date_Completed)

and R2( Emp_ID , Salary)

The following dependencies violate partial dependency as a prime attribute -> prime attribute :

Name -> Emp_ID

DeptID -> Emp_ID

Marketing -> Emp_ID

The following dependencies violate partial dependency as a non-prime attribute -> non-prime attribute :

Course_ID -> Course Name

Course_Name -> Course_ID

So, no separate tables should be made.

The functional dependency Date_Completed -> Course_Name has a partial dependency as a prime attribute determines a non-prime attribute.

So, a separate table is made.

The final relational schemas that follows 2NF are :

R1(Emp_ID, Name, DeptID, Marketing, Course_ID, Course_Name, Date_Completed)

R2( Emp_ID , Salary)

R3 (Date_Completed, Course_Name, Course_ID)

For a relation to be in 3NF, the functional dependencies should not have any transitive dependencies.

The functional dependencies in R1(Emp_ID, Name, DeptID, Marketing, Date_Completed) is :

Emp_ID -> Name, DeptID, Marketing

This violates the transitive property. So, no table is created.

The functional dependencies in R2 ( Emp_ID , Salary) is :

Emp_ID -> Salary

The functional dependencies in R3 (Date_Completed, Course_Name, Course_ID) are :

Date_Completed -> Course_Name

Course_Name -> Course_ID

Here there is a transitive dependency as a non- prime attribute ( Course_Name ) is determining a non-attribute ( Course_ID ).

So, a separate table is made with the concerned attributes.

The relational schemas which support 3NF re :

R1(Emp_ID, Name, DeptID, Course_ID, Marketing, Date_Completed) with candidate key as Emp_ID.

R2 ( Emp_ID , Salary) with candidate key Emp_ID.

R3 (Date_Completed, Course_Name ) with candidate key Date_Completed.

R4 ( Course_Name, Course_ID ). with candidate keys Course_Name and Course_ID.

6 0

3 years ago

You have purchased a printer that has the capability to print in duplex mode so that users can print on both sides of a sheet of

fiasKO [112]

If you have purchased a printer that has the capability to print in duplex mode so that users can print on both sides of a sheet of paper. However, when users try to use this capability when they send a print job, documents are still printed on only one side. Then there might be a problem with (d) THE DUPLEX MODE NEEDS TO BE ENABLED ON THE DEVICE SETTINGS TAB IN THE PRINTER'S PROPERTIES.

Explanation:

If the duplex mode isn't enable on the printer setting, then the printer is still going to read that the output should come in a single page and not in the duplex mode.
When facing such a problem, the user should go to the "Device Settings" tab in the printer properties and change the required settings to print according to the users needs.

7 0

4 years ago