Answer:
Following is the program in C language :
#include <stdio.h> // header file
#define n 5 //  macro
int main() main function 
{
    int a[n],k1; // variable and array declaration
    printf("Enter the element:\n");
    for(k1=0;k1<n;++k1) //iterating the loop
    {
        scanf("%d",&a[k1]);//Read the values by user
    }
    printf("Output in Reverse Order:\n");
    for(k1=n-1;k1>=0;--k1)//iterating the loop
    {
    printf(" %d ",a[k1]); //Display the values
    }
    return 0;
}
Output:
Enter the element:
4
3 
45
67
89
Output in Reverse Order: 89 67 45 3 4
Explanation:
Following is the description of the program
- Define a macro "n" with value 5 after the header file.
- Declared an array "a" and defined the size of that array by macro i.e "n".
- Read the value by the user by using scanf statement in the array "a"
- Finally In the last for loop display the values of array "a" by space. 
 
        
             
        
        
        
The already-long problem on hacking and other security-related cases necessitates for the application builders to check the data received from unknown sources. To further strengthen the security, even data received from known sources also need to be check as these may also contain harmful viruses creating critical problem to the application. 
        
             
        
        
        
Answer:
 javac Welcome.java
Explanation:
In order to the file to compile with the default compiler in the JDK, the instruction must be of the form:
javac filename
(Note: the filename with the .java extension)
 
        
             
        
        
        
Answer: Search File Explorer: Open File Explorer from the taskbar or right-click on the Start menu, and choose File Explorer, then select a location from the left pane to search or browse. For example, select This PC to look in all devices and drives on your computer, or select Documents to look only for files stored there.
Explanation: hope this helps :)
 
        
             
        
        
        
Answer:
D. smart phone
explanation;
a. what the heck is a radio going to do?
b. an HD television? is his job watching movies?
d. he already has a form of communication he uses, he needs something that can to both things at the same time
c. a smart phone can do everything he needs to do, likely faster than a landline phone or laptop.