Demonstrate the computations that take place during the evaluation of this block, that is, give a sequence of lines each showing the complete runtime stack with all activation records after each statement or function call. For recursive calls use one stack onto which a new activation record is pushed on for each recursive function call.
Demonstrate the computations that take place during the evaluation of this block, that is, give a sequence of lines each showing the complete runtime stack with all activation records after each statement or function call. For recursive calls use one stack onto which a new activation record is pushed on for each recursive function call.
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
Related questions
Question
ANSWER MUST BE WRITTEN IN THE SAME FORM AS THE EXAMPLE.
![1
2
WN
8
{ int x;
int z;
9
10
11
12
13 }
z = 3;
{ int f(int x) {
if x=0 then {
z = 1 }
{
else
z = f(x-1) *2 };
return z;
};
x = f (3);
;
3 [z-3, x=?]
4
11
5
0000000
B
5
8
5
8
5
6
9
co on
8
9
co on
8
9
00 0
8
9
[f={}, z=3, x=?]
>>
[x=3, f={}, z=3, x=?]
[x=2, x-3, f={}, z=3, x=?]
[x=1, x=2, x=3, f={}, z=3, x=?]
[x=0, x=1, x=2, x=3, f{}, z=3, x=?]
[x=0, x=1, x=2, x=3, f={}, z=1, x=?]
[res=1 x=0, x=1, x=2, x=3, f={}, z=1,
[x=1, x=2, x=3, f={}, z=2, x=?]
[res=2, x=1, x=2, x=3, f={}, z=2, x=?]
[x=2, x=3, f={}, z=4, x=?]
[res-4, x-2, x=3, f={}, z=4, x=?]
[x=3, f={}, z=8, x=?]
[res-8, x-3, f={}, z-8, x=?]
11 [f-{}, z-8, x-8]
12 [z-8, x=8]
13 [1](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9b507547-b332-47b2-8e5e-934d44333819%2F4d51889a-a108-4403-b426-51cc7dd24270%2Fi8hjyxi_processed.png&w=3840&q=75)
Transcribed Image Text:1
2
WN
8
{ int x;
int z;
9
10
11
12
13 }
z = 3;
{ int f(int x) {
if x=0 then {
z = 1 }
{
else
z = f(x-1) *2 };
return z;
};
x = f (3);
;
3 [z-3, x=?]
4
11
5
0000000
B
5
8
5
8
5
6
9
co on
8
9
co on
8
9
00 0
8
9
[f={}, z=3, x=?]
>>
[x=3, f={}, z=3, x=?]
[x=2, x-3, f={}, z=3, x=?]
[x=1, x=2, x=3, f={}, z=3, x=?]
[x=0, x=1, x=2, x=3, f{}, z=3, x=?]
[x=0, x=1, x=2, x=3, f={}, z=1, x=?]
[res=1 x=0, x=1, x=2, x=3, f={}, z=1,
[x=1, x=2, x=3, f={}, z=2, x=?]
[res=2, x=1, x=2, x=3, f={}, z=2, x=?]
[x=2, x=3, f={}, z=4, x=?]
[res-4, x-2, x=3, f={}, z=4, x=?]
[x=3, f={}, z=8, x=?]
[res-8, x-3, f={}, z-8, x=?]
11 [f-{}, z-8, x-8]
12 [z-8, x=8]
13 [1

Transcribed Image Text:Consider the following block. Assume static scoping and call-by-value parameter passing.
1 = {
2
WNH
3
L
10
11
12
13
};
int x;
int z;
z :=4;
{
};
int f(int x) {
if x==0 then {
z = 1 }
else {
z = f(x-1) *z+2 };
return z;
};
x := f (3);
Demonstrate the computations that take place during the evaluation of this block, that is, give a
sequence of lines each showing the complete runtime stack with all activation records after each
statement or function call. For recursive calls use one stack onto which a new activation record is
pushed on for each recursive function call.
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