Answer:
The code is witten in Java and given in the explanation section.
Using a Scanner object we receive a the user's input and with the System.out.println we output the variable
Explanation:
import java.util.Scanner;
public class VariableOutput{
public static void main (String [] args){
Scanner input = new Scanner(System.in);
System.out.println("Enter an Integer 15 or 40");
int numObjects = input.nextInt();
System.out.println("You entered the number "+numObjects);
}
}
Answer:
Computer is an example of electronic device.
Answer:
It's up to personal preference.
Explanation:
iPhone/Apple gives more compliments to security than Android.
Android has more friendly user GUI and dev tools.
Answer:
b. foreign key
Explanation:
In the database world, a foreign key is a field on one table and a primary key for another table. The purpose of a foreign key is to provide linkages between two or more tables. Given two tables A and B, and making A the point of reference, a primary key is a field that is unique in A while a foreign key is unique in B.
On another hand, a composite primary key is a combination of two or more fields/columns on database table that can be used to uniquely identify each row in the table.
In the database lingua, what we have is a unique key not a distinct key, though the two words are similar in meaning.
A duplicate key is used when an information may be repeatedly entered on a table.
So the correct option is a foreign key.
Answer:
The word efficient denotes the ability to achieve a good goal toward a person, and effectiveness denotes reliable production or achievement.
Explanation:
Many people around the world can set efficient goals, that is, to influence or encourage other people to make good projects or changes in their lives, by example or simply teach them with patience and altruism.
In this way effectiveness will be seen, that is, the product or the achievement precisely when we observe how people undertake new projects in their lives
