(The following code is used in questions 18 and 19. Consider the following pseudo-program:) Procedure Main(): begin var x,y: integer Procedure A(var z: integer): begin var x: integer; x:= 1; B(): Z:= x; end; procedure B(): begin X: X-1; end; X: 5: A(y): Write(y): end; 11. If the language uses static scoping rules, the output of executing Main() will be: a. 0

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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H1.

are any of these wrong?

(The following code is used in questions 18 and 19. Consider the following pseudo-program:)
Procedure Main(): begin
var x,y: integer
Procedure A(var z: integer): begin
var x: integer;
x:= 1;
BO):
Z:= x;
end;
procedure B(): begin
X:X-1;
end;
X: 5:
A(y):
Write(y):
end
11. If the language uses static scoping rules, the output of executing Main() will be:
a. 0
b. 4
d. 5
12. If the language uses dynamic scoping rules, the output of executing Main(() will be:
a. 4
b. 3
c. 0
d. 5
13. Consider the grammar
S-> AB AD
A Aalb
B Bb a
D-> cDe d
Which of the following is not a valid string in the language?
a. beedee
b. bbbbab
c. aaaacccc
d. all of them
Transcribed Image Text:(The following code is used in questions 18 and 19. Consider the following pseudo-program:) Procedure Main(): begin var x,y: integer Procedure A(var z: integer): begin var x: integer; x:= 1; BO): Z:= x; end; procedure B(): begin X:X-1; end; X: 5: A(y): Write(y): end 11. If the language uses static scoping rules, the output of executing Main() will be: a. 0 b. 4 d. 5 12. If the language uses dynamic scoping rules, the output of executing Main(() will be: a. 4 b. 3 c. 0 d. 5 13. Consider the grammar S-> AB AD A Aalb B Bb a D-> cDe d Which of the following is not a valid string in the language? a. beedee b. bbbbab c. aaaacccc d. all of them
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