A certain processor supports only the immediate and the direct addressing modes. Which of the following programming language features cannot be implemented on this processor?

Consider the following program in a language that has dynamic scooping:

var x: real;
procedure show;
         begin print(x); end;
procedure small;
         var x: real;
             begin x: = 0.125; show; end;
begin x:=0.25;
         show; small
         end;

Then the output of the program is:

Faster access to non-local variables is achieved using an array of pointers to activation records called a

Given the following Pascal like program segment:

Procedure A;

     x,y:intger;

     Procedure B;

            x,z:real;

            S1

     end B;

     Procedure C;

            i:integer;

            S2;

     end C;

end A;

The variables accessible in S1 and S2 are