Question

Question 22:

Describe two fundamental differences between terminal-based user interfaces and GUIs.

What roles do the parameters and the return statement play in a function definition?

Answer 1

Answer 22:

Two fundamental differences between terminal-based user interfaces and GUIs:

1) In terminal-based user interfaces, a user has to issue a set of commands to execute or perform the task but in GUIs, users can execute tasks through graphical icons or visual indicators.

2) The terminal-based user interface requires less memory compared to GUIs as GUIs contain a lot of graphical components. Terminal-based user interfaces are faster compared to GUIs.

Roles of parameters and the return statement in a function definition:

During the calling of a function, we pass certain values with the function which are required to execute the function. The passed values are called as parameters of the function.

For example:

public static int minimum(int a, int b) { int min; if (a > b) min = b; else min = a; return min; }

For the function stated above a and b are parameters.

After the execution of a function, the function gives output by a return statement.

For example:

public static int minimum(int a, int b) {
   int min;
   if (a > b)
      min = b;
   else
      min = a;

   return min; 
}

the function returns the minimum value by the statement return min;