NEW PERSP.ON COMP.CONCEPTS-PACKAGE
17th Edition
ISBN: 9781337761116
Author: Carey
Publisher: CENGAGE L
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Chapter 12, Problem 5RA
Program Plan Intro
To create an aside element containing ID as “Keywords” and heading h1 having text “Keywords List”.
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1234
3. Which line prevents compiler optimization? Circle one: 1234
Suggested solution:
Store strlen(str) in a variable before the if statement.
⚫ Remove the if statement.
Replace index 0 && index < strlen(str)) {
5 }
}
=
str [index] = val;
Character Hex value | Character Hex value Character Hex value
'A'
0x41
'J'
Ox4a
'S'
0x53
'B'
0x42
'K'
0x4b
"T"
0x54
0x43
'L'
Ox4c
'U'
0x55
0x44
'M'
0x4d
'V'
0x56
0x45
'N'
Ox4e
'W'
0x57
0x46
'0'
Ox4f
'X'
0x58
0x47
'P'
0x50
'Y'
0x59
0x48
'Q'
0x51
'Z'
Ox5a
'T'
0x49
'R'
0x52
'\0'
0x00
Now consider what happens on a Linux/x86 machine when callfoo calls foo with
the input string "ZYXWVUTSRQPONMLKJIHGFEDCBA".
A. On the left draw the state of the stack just before the execution of the instruction
at address Ox40053a; make sure to show the frames for callfoo and foo and
the exact return address, in Hex at the bottom of the callfoo frame.
Then, on the right, draw the state of the stack just after the instruction got
executed; make sure to show where the string "ZYXWVUTSRQPONMLKJIHGFEDCBA"
is placed and what part, if any, of the above return address has been overwritten.
B. Immediately after the ret instruction at address 0x400543 executes, what is
the value of the program counter register %rip?…
1 typedef struct node* {
2
struct node* next;
3
char* key;
4
char* val;
5} node_t;
6
7 char* find_node (node_t* node, char* key_to_find) {
while(strcmp (node->key, key_to_find ) != 0 ) {
node = node->next;
8
9
10
}
11
return node->val;
12 }
Chapter 12 Solutions
NEW PERSP.ON COMP.CONCEPTS-PACKAGE
Ch. 12.2 - Prob. 1QCCh. 12.2 - Prob. 2QCCh. 12.2 - Prob. 3QCCh. 12.2 - Prob. 4QCCh. 12.2 - Prob. 5QCCh. 12.2 - Prob. 6QCCh. 12.3 - Prob. 1QCCh. 12.3 - Prob. 2QCCh. 12 - Prob. 1RACh. 12 - Prob. 2RA
Ch. 12 - Prob. 3RACh. 12 - Prob. 4RACh. 12 - Prob. 5RACh. 12 - Prob. 6RACh. 12 - Prob. 7RACh. 12 - Prob. 8RACh. 12 - Prob. 9RACh. 12 - Prob. 10RACh. 12 - Prob. 11RACh. 12 - Prob. 12RACh. 12 - Prob. 13RACh. 12 - Prob. 1CP1Ch. 12 - Prob. 2CP2Ch. 12 - Prob. 3CP2Ch. 12 - Prob. 4CP2Ch. 12 - Prob. 5CP2Ch. 12 - Prob. 4CP3Ch. 12 - Prob. 20CP3Ch. 12 - Prob. 3CP4Ch. 12 - Prob. 4CP4Ch. 12 - Prob. 5CP4Ch. 12 - Prob. 6CP4Ch. 12 - Prob. 7CP4Ch. 12 - Prob. 8CP4Ch. 12 - Prob. 9CP4Ch. 12 - Prob. 10CP4Ch. 12 - Prob. 11CP4Ch. 12 - Prob. 12CP4Ch. 12 - Prob. 13CP4Ch. 12 - Prob. 14CP4
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