INFORMATION TECH.PROJECT...-W/MINDTAP
INFORMATION TECH.PROJECT...-W/MINDTAP
9th Edition
ISBN: 9781337586801
Author: SCHWALBE
Publisher: CENGAGE L
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Chapter 10, Problem 1DQ

Explanation of Solution

Importance of communication skill for technical professionals:

Communication is part of work for people in all industry and education programs. For technical professionals, along with the technical skills, communication skill is also important.

Technical professionals will have the situation to communicate with other technical professional of other country and to their stakeholders, higher officials. Here the communicational skill plays an important role.

Communication can be done through speaking, writing or through non-verbal communication such as body language to convey information to others.

Influencing industry and educational programs using satire ways:

Media poke fun at the communication skill of technical professional, influences the industry and educational program by,

  • Telling the importance of communication, when there is good communication in an industry or organization, there may be any number of positive outcomes and increased productivity which leads to higher satisfaction.
  • When a person is a boss of an industry, needs to explain, inform all things to his employees. Boss needs to provide training to his members for any projects, where a boss needs communication skill.
  • Industry or workplace and educational programs often organize many programs to improve a person’s communication skill.
  • Industry and educational program fixes rules for the employees that their communication must be in English.
  • Media encourages people to improve their communication and explains the result of poor communication in any workplace.
  • Poor communication will lack enthusiasm for employee and inadequate handling of important projects reduces innovation in industry.
  • Basic communication skill is developed using educational programs, educational programs also uses many different ideas to improve communication of students and employees.

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Students have asked these similar questions
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…

Chapter 10 Solutions

INFORMATION TECH.PROJECT...-W/MINDTAP

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