A primary key is a field that contains data unique to a record
Answer: Proxy server
Explanation: Proxy server is a type of server that is acts as interface between the network on huge scale and any local network. This server provides the feature of security, operations, privacy etc in the network system. They also help in improving the performance of the network.
It can work as the web filter to eliminate the unwanted websites.They acts as the gateway by observing the website that is being browsed by the other user.Thus installation of proxy server should implemented on the organization.
Answer:
17.0
Explanation:
after first loop numA = 0.0 + 2 = 2.0
after second loop numA = 2.0 + 5 = 7.0
after third loop numA = 7 + 10 = 17.0
A) Limestone is the correct answer
Answer:
Following are the program in java is given below
import java.util.*; // import package
public class Main // main class
{
public static void main(String[] args) // MAIN FUNCTION
{
Scanner scan2 = new Scanner(System.in);// scanner CLASS
System.out.println("Enter the Grade ");
char GRADE = scan2.next().charAt(0);//Read input by user
if(GRADE=='A' || GRADE=='B' || GRADE=='C' || GRADE=='D' || GRADE=='F' ) // //CHECK CONDITION
{
System.out.println("The GRADE is :" +GRADE); // display grade
}
else // Else block
{
System.out.println(" Input Error"); // display message
}
}
}
Output:
Enter the Grade
D
The GRADE is :D
Explanation:
Following are the description of program
- Create the object of scanner class for read the value of grade by the user .
- Read the value of "GRADE" variable by using the scanner class object scan 2
- Now check the condition in if block if the "GRADE" is 'A' or 'B' or 'C' or 'D' or 'F' then display the value of the GRADE variable otherwise else block is executed and input error message is displayed .
