Answer:
SELECT
COUNT(SN), SUM(TaxAmount)
FROM ORDERS
or
SELECT
COUNT(SN) AS NumOrder, SUM(TaxAmount) As TotalTax
FROM ORDERS
Explanation:
Finding it difficult to add my explanation. So, I used an attachment instead
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Answer:
<u>Output</u>
The values read are:
25
3
4
65
7
9
5
6
1
11
10 data values were read
Explanation:
Below is the Java program to read all data from the file echoing the data to standard output and finally displaying how many data were read:-
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
public class MyFileReader {
public static void main(String[] args){
int num,counter=0;
File file=new File("numbers.txt");
try {
Scanner input=new Scanner(file);
System.out.println("The values read are: ");
while(input.hasNext()){
num=input.nextInt();
System.out.println(num);
counter+=1;
}
System.out.println(counter+" data values were read");
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
Answer:
c. parameters
Explanation:
Parameters are simply placeholders (sometimes called dummy variables) used mainly by methods to perform their given tasks so as to provide controlled variability in the program(or algorithm). Sometimes they are called arguments. But then it is much more specific to simply use parameters rather than arguments because arguments are the variable values that the parameters are serving as placeholders for.
Parameters identify and describe values that are passed into a function or subroutine.
Parameters are also used for simulation and testing purposes where the input s to the program are or can be varied.
PS: Methods are just functions performed by a class in a program.
Answer:
A bootloader, also known as a boot program or bootstrap loader, is a special operating system software that loads into the working memory of a computer after start-up.
Explanation:
