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natta225 [31]
3 years ago
6

When users create, alter, or drop tables or create or drop indexes, the dbms updates the system catalog automatically.​?

Computers and Technology
1 answer:
faust18 [17]3 years ago
3 0
<span>True.  When users make changes to the database, such as creating, altering, or dropping tables or creating or dropping indexes, the DBMS updates the system catalog automatically.</span>
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Please debug the below code in Java please.
lisabon 2012 [21]

Answer:

Check the explanation

Explanation:

//Bugs are highlighted in bold text

class Invoice

Declarations

private num invoiceNumber

private string customer

private num balanceDue

private num tax

public void setInvoiceNUMBER(num number)

Declarations

num LOW_NUM = 1000

num HIGH_NUM = 9999

if number > HIGH_NUM then

invoiceNumber = 0

else

if number < LOW_NUM then

invoiceNumber = 0

else

invoiceNumber = num

endif

return

public void setCustomer(string cust)

customer = cust

return

public void setBalanceDue(num balance)

//Bug balanceDue is Invoice class varible

//but it is assigned to balance .it gives error

balance = balanceDue

setTax()

return

private void setTax()

Declarations

//Bug TAX_RATE is declared as string

//but assigned a double value

string TAX_RATE = 0.07

tax = tax * TAX_RATE

return

public void displayInvoice()

output "Invoice #", invoiceNumber

output "Customer: ", customer

output "Due: ", balanceDue

output "Tax: ", taxDue

//Bug

//Invoice class has no variable called balance .it should be balanceDue

output "Total ", balance + taxDue

return

endClass

start

Declarations

Invoice inv1

Invoice inv2

Invoice inv3

//Warning

//it gives warning object taken but not initilaized

Invoice inv4

inv1.setInvoiceNumber(1244)

inv1.setCustomer("Brown")

inv1.setBalanceDue(1000.00)

inv1.displayInvoice()

inv2.setInvoiceNumber(77777)

inv2.setCustomer("Jenkins")

inv2.setBalanceDue(2000.00)

inv2.displayInvoice()

inv3.setInvoiceNumber(888)

inv3.setCustomer("Russell")

inv3.setBalanceDue(3000.00)

//Bug

//setTax method of Invioce doesnot take any arguments

inv3.setTax(210.00)

inv3.displayInvoice()

stop

//Here is the complete program in c++

//Run the program using Microsoft visual studio 2010 vc++

#include<iostream>

#include<iomanip>

#include<string>

using namespace std;

class Invoice

{

//class varibales

private:

           int invoiceNumber;

           string customer;

           double balanceDue;

           double tax;

//class methods

public:

           void setCustomer(string cus);

           void displayInvoice();

           void setBalanceDue(double balance);

           void setInvoiceNUMBER(int number);

           void setTax();

};

void Invoice::displayInvoice()

{

cout<< setw(10)<<"Invoice #"<<setw(5)<<invoiceNumber<<endl;

cout<<setw(10)<<"Customer: "<<setw(5)<<customer<<endl;

cout<<setw(10)<<"Due: "<<setw(5)<<balanceDue<<endl;

cout<<setw(10)<<"Tax: "<<setw(5)<<tax<<endl;

//Bug

//Invoice class has no variable called balance .it should be balanceDue

cout<< "Total "<< balanceDue + tax<<endl;

}

void Invoice::setCustomer(string cust)

{

customer = cust;

}

void Invoice::setInvoiceNUMBER(int number)

{

const int LOW_NUM = 1000;

const int HIGH_NUM = 9999;

if( number > HIGH_NUM )

invoiceNumber = 0;

else

if (number < LOW_NUM )

       invoiceNumber = 0;

else

   invoiceNumber = number;

}

void Invoice::setBalanceDue(double balance)

{

balanceDue = balance;

}

void Invoice::setTax()

{

double TAX_RATE = 0.07;

tax = balanceDue * TAX_RATE;

}

int main()

{

Invoice inv1;

Invoice inv2;

Invoice inv3;

inv1.setInvoiceNUMBER(1244);

inv1.setCustomer("Brown");

inv1.setBalanceDue(1000.00);

inv1.setTax();

inv1.displayInvoice();

inv2.setInvoiceNUMBER(77777);

inv2.setCustomer("Jenkins");

inv2.setBalanceDue(2000.00);

inv2.setTax();

inv2.displayInvoice();

inv3.setInvoiceNUMBER(888);

inv3.setCustomer("Russell");

inv3.setBalanceDue(3000.00);

inv3.setTax();

inv3.displayInvoice();

system("pause");

return 0;

}

Kindly check the output image below.

5 0
3 years ago
A year in the modern Gregorian Calendar consists of 365 days. In reality, the earth takes longer to rotate around the sun. To ac
GREYUIT [131]

Answer:

import java.util.Scanner;

public class LabProgram {

  public static void main(String[] args) {

      Scanner scnr = new Scanner(System.in);

      int inputYear;

      boolean isLeapYear;

      isLeapYear = false;

      inputYear = scnr.nextInt();

      // If a year is divisible by 400,  then it is a leap year

      if (inputYear % 400 == 0)

          isLeapYear = true;

      // If a year is divisible by 100,  then it is not a leap year

      if (inputYear % 100 == 0)

          isLeapYear = false;

      // If a year is divisible by 4,  then it is a leap year

      if (inputYear % 4 == 0)

          isLeapYear = true;

      if(isLeapYear)

          System.out.println(inputYear + " is a leap year.");

      else

          System.out.println(inputYear + " is not a leap year.");

  }

}

Explanation:

  • Take the year as an input from user and store it to inputYear variable.
  • If the year is a century year, check if the year is divisible by 400 ( the year must be evenly divisible by 400 ),  then set the boolean isLeapYear to true. If a year is divisible by 100,  then set the boolean isLeapYear to false. If a year is divisible by 4,  then set the boolean isLeapYear to true.
  • Check if isLeapYear is true, then print that it is a leap year. Otherwise, print that it is not a leap year.

Output:

1712

1712 is a leap year.

4 0
3 years ago
Read 2 more answers
When using bits to represent fractions of a number, can you make all possible fractions?
saw5 [17]
This is your perfect answer

8 0
2 years ago
Select the best option that should be considered when preparing these images to.be used for the web
DerKrebs [107]
The answer is 1) JPEG  2) TIFF   3) BMP.  
<span>The best option that should be considered when preparing these images to.be used for the web :
</span>1) JPG (jpeg) - Used to compress web images to a small file size without
    sacrificing quality
2) TIFF (tiff) - Used for professional print images to save in a uncompressed 
     file format at high resolution.
3) BMP - Used for either web or print because of the ability to save high
    quality images ether compressed or uncompressed.
6 0
3 years ago
WNOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOW
beks73 [17]

Answer:

yes.

Explanation:

7 0
2 years ago
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