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Ray Of Light [21]
2 years ago
11

In reference to operating systems, what is spooling? what does it stand for? chegg

Computers and Technology
1 answer:
blondinia [14]2 years ago
8 0

Answer:

Spooling is a process in which data is temporarily held to be used and executed by a device, program or the system. Data is sent to and stored in memory or other volatile storage until the program or computer requests it for execution. "Spool" is technically an acronym for simultaneous peripheral operations online.

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Define the terms candidate key and primary key. Explain the difference between a primary key and a candidate key.
Shkiper50 [21]

Explanation:

Both Primary Key and Candidate Key are the attributes that are used to access tuples from a table. These (Primary key and Candidate key) are also can be used to create a relationship between two tables.

  • A Candidate Key can be any column or a combination of columns that can qualify as a unique key in the database. Each Candidate Key can qualify as a Primary Key.
  • A Primary Key is a column or a combination of columns that uniquely identify a record. The primary key is a minimal super key, so there is one and only one primary key in any relationship.

<em> The main difference between them is that a primary key is unique but there can be many candidate keys. </em>

I hope you find this information useful and interesting! Good luck!

5 0
3 years ago
g Write a program that prompts the user for an integer n between 1 and 100. If the number is outside the range, it prints an err
grin007 [14]

Answer:

The cpp program is given below.

#include<iostream>

#include<iomanip>

using namespace std;

int main() {

   

   // variables declared

   int n;

   int sum=0;

   float avg;

   

   do

   {

       // user input taken for number    

       cout<< "Enter a number between 1 and 100 (inclusive): ";

       cin>>n;

       

       if(n<1 || n>100)

           cout<<" Number is out of range. Enter valid number."<<endl;

       

   }while(n<1 || n>100);

   

   cout<<" "<<endl;

   

   // printing even numbers between num and 50  

   for(int num=1; num<=n; num++)

   {

       sum = sum + num;

   }

   

   avg = sum/n;

   

   // displaying sum and average

   cout<<"Sum of numbers between 1 and "<<n<<" is "<<sum<<endl;

   cout<<"Average of numbers between 1 and "<<n<<" is ";

   printf("%.2f", avg);

   

       return 0;

}

OUTPUT

Enter a number between 1 and 100 (inclusive): 123

Number is out of range. Enter valid number.

Enter a number between 1 and 100 (inclusive): 56

 

Sum of numbers between 1 and 56 is 1596

Average of numbers between 1 and 56 is 28.00

Explanation:

The program is explained below.

1. Two integer variables are declared to hold the number, n, and to hold the sum of numbers from 1 to n, sum. The variable sum is initialized to 0.

2. One float variable, avg, is declared to hold average of numbers from 1 to n.

3. User input is taken for n inside do-while loop. The loop executes till user enters value between 1 and 100. Otherwise, error message is printed.

4. The for loop executes over variable num, which runs from 1 to user-entered value of n.

5. Inside for loop, all the values of num are added to sum.

sum = sum + num;

6. Outside for loop, average is computed and stored in avg.

avg = sum/n;

7. The average is printed with two numbers after decimal using the following code.

printf("%.2f", avg);

8. The program ends with return statement.

9. All the code is written inside main() and no classes are involved.

3 0
3 years ago
The information of an management information system comes from?
Debora [2.8K]

A management information system is a computer system consisting of hardware and software that serves as the backbone of an organization's operations

5 0
2 years ago
A programming language is used to tell a computer what to do to solve a problem?
goldfiish [28.3K]
As far as humans are concerned. What's written in the programming language needs to interpreted or compiled into something that the machine can actually deal with.
5 0
3 years ago
Discuss whether design considerations need to change for each kind of computer users. support your answer with an example.
vaieri [72.5K]
Each kind of computer users have different knowledge, needs and requirements. For example there is a difference between the computer knowledge of developers and users without <span>technical experience. Because of this, but also why they need and use computers, and what tools they need, design consideration need to change for each kind of computer users.</span>
<span>
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8 0
3 years ago
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