“ = ” is the assignment operator in java. Hence, the correct answer is option “ A ”.

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Chapter 2, Problem 4RQ

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“=” is the assignment operator in java.

Hence, the correct answer is option “A”.

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The next problem concerns the following C code: /copy input string x to buf */ void foo (char *x) { char buf [8]; strcpy((char *) buf, x); } void callfoo() { } foo("ZYXWVUTSRQPONMLKJIHGFEDCBA"); Here is the corresponding machine code on a Linux/x86 machine: 0000000000400530 : 400530: 48 83 ec 18 sub $0x18,%rsp 400534: 48 89 fe mov %rdi, %rsi 400537: 48 89 e7 mov %rsp,%rdi 40053a: e8 d1 fe ff ff 40053f: 48 83 c4 18 add callq 400410 $0x18,%rsp 400543: c3 retq 0000000000400544 : 400544: 48 83 ec 08 sub $0x8,%rsp 400548: bf 00 06 40 00 mov $0x400600,%edi 40054d: e8 de ff ff ff callq 400530 400552: 48 83 c4 08 add $0x8,%rsp 400556: c3 This problem tests your understanding of the program stack. Here are some notes to help you work the problem: • strcpy(char *dst, char *src) copies the string at address src (including the terminating '\0' character) to address dst. It does not check the size of the destination buffer. You will need to know the hex values of the following characters:

A ROP (Return-Oriented Programming) attack can be used to execute arbitrary instructions by chaining together small pieces of code called "gadgets." Your goal is to create a stack layout for a ROP attack that calls a function located at '0x4018bd3'. Below is the assembly code for the function 'getbuf', which allocates 8 bytes of stack space for a 'char' array. This array is then passed to the 'gets' function. Additionally, you are provided with five useful gadgets and their addresses. Use these gadgets to construct the stack layout. Assembly for getbuf 1 getbuf: 2 sub $8, %rsp 3 mov %rsp, %rdi 4 call gets 56 add $8, %rsp ret #Allocate 8 bytes for buffer #Load buffer address into %rdi #Call gets with buffer #Restore the stack pointer #Return to caller. Stack Layout (fill in Gadgets each 8-byte section) Address Gadget Address Value (8 bytes) 0x4006a7 pop %rdi; ret 0x7fffffffdfc0 Ox4006a9 pop %rsi; ret 0x7fffffffdfb8 0x4006ab pop %rax; ret 0x7fffffffdfb0 0x7fffffffdfa8 Ox4006ad mov %rax,…

In each of the following C code snippets, there are issues that can prevent the compilerfrom applying certain optimizations. For each snippet:• Circle the line number that contains compiler optimization blocker.• Select the best modification to improve optimization.1. Which line prevents compiler optimization? Circle one: 2 3 4 5 6Suggested solution:• Remove printf or move it outside the loop.• Remove the loop.• Replace arr[i] with a constant value.1 int sum( int ∗ ar r , int n) {2 int s = 0 ;3 for ( int i = 0 ; i < n ; i++) {4 s += a r r [ i ] ;5 p r i n t f ( ”%d\n” , s ) ;6 }7 return s ;8 }2. Which line prevents compiler optimization? Circle one: 2 3 4 5 6Suggested solution:• Move or eliminate do extra work() if it’s not necessary inside the loop.• Remove the loop (but what about scaling?).• Replace arr[i] *= factor; with arr[i] = 0; (why would that help?).1 void s c a l e ( int ∗ ar r , int n , int f a c t o r ) {2 for ( int i = 0 ; i < n ; i++) {3 a r r [ i ] ∗= f a c t o r…

Answer 2

Expert Solution & Answer

Chapter 2, Problem 4RQ

Program Description Answer

“=” is the assignment operator in java.

Hence, the correct answer is option “A”.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 3

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Chapter 2, Problem 4RQ

Program Description Answer

“=” is the assignment operator in java.

Hence, the correct answer is option “A”.

Expert Solution & Answer

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Check out a sample textbook solution

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Answer 4

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Chapter 2, Problem 4RQ

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“=” is the assignment operator in java.

Hence, the correct answer is option “A”.

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Check out a sample textbook solution

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Answer 5

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Answer 6

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Answer 7

Chapter 2, Problem 4RQ

Program Description Answer

“=” is the assignment operator in java.

Hence, the correct answer is option “A”.

Answer 8

Chapter 2, Problem 4RQ

Program Description Answer

“=” is the assignment operator in java.

Hence, the correct answer is option “A”.

Answer 9

Chapter 2, Problem 4RQ

Program Description Answer

“=” is the assignment operator in java.

Hence, the correct answer is option “A”.

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 2 - Prob. 1RQ Ch. 2 - Prob. 2RQ Ch. 2 - Prob. 3RQ Ch. 2 - Prob. 4RQ Ch. 2 - Prob. 5RQ Ch. 2 - Prob. 6RQ Ch. 2 - Prob. 7RQ Ch. 2 - Prob. 8RQ Ch. 2 - Prob. 9RQ Ch. 2 - Prob. 10RQ

“ = ” is the assignment operator in java. Hence, the correct answer is option “ A ”.

Solution Summary: The author explains that " =" is the assignment operator in java. The assignment statements are used to designate value to a variable.

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“=” is the assignment operator in java.

Hence, the correct answer is option “A”.

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Chapter 2 Solutions

“ = ” is the assignment operator in java. Hence, the correct answer is option “ A ”.

Solution Summary: The author explains that " =" is the assignment operator in java. The assignment statements are used to designate value to a variable.

Concept explainers

Videos

“=” is the assignment operator in java. Hence, the correct answer is option “A”.

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Chapter 2 Solutions

“=” is the assignment operator in java.

Hence, the correct answer is option “A”.