The statement 'a data mart is the operational database for the company' is true.
We can define a data mart as a subject-oriented database that focuses on a particular area in an organization.
It is through data mart that the employees of a company can access data faster. Data mart, functioning as the operational database, helps employees as they do not have to manually add all the data again. Also, any piece of data needed by an employee can easily be accessed through the data mart of the company.
One of the advantages of using data mart is that it eradicates human-made errors which can arise if data is added manually by an employee.
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Answer:
- import java.util.Scanner;
-
- public class Main {
- public static void main(String[] args) {
- Scanner input = new Scanner(System.in);
- String numStr = input.nextLine();
- double num;
- try{
- num = Double.parseDouble(numStr);
- }
- catch(NumberFormatException e){
- num = 0;
- System.out.println("Value entered cannot be converted to a floating point number.");
- }
- }
- }
Explanation:
The solution code is written in Java.
Firstly, we create a Scanner object and prompt user to input a number (Line 5-6). Next, we create a try -catch block and place the parseDouble inside the try block. If the input is invalid (e.g. "abc"), a NumberFormatException error will be thrown and captured and set the num to 0 and display the error message (Line 11 - 13).
Answer:
Option b is the correct answer for the above question.
Explanation:
The DBMS is used to manage the information or data which is stored to use in the future. Any project has two sides one is the front end and the other is back-end. The front-end refers to the graphics which are visible to the user of the project but the data is not stored on the side of the project it is stored on any database software which can be called for the request of any event of the project. The database is stored on the backed of the project so to bring the data from the database, the process is known as back-end processing.
The above question wants to ask about the process of DBMS which is said to the back-end process because the DBMS process the data and to process the data is known as the back-end process. So Option b is the correct while the other is not because--
- Option 'a' states about front-end-processing which processes the design of the websites.
- Option c states about the file server which is said to the DBMS.
- Option d states about the management system which is not in the project.
