lem 7 Explain one security problem with each of the following code snippets and suggest a defense to each security problem. 1. txtUserId getRequestString ("UserId"); txtSQL SELECT FROM Users WHERE UserId = +txtUserId; 2. char buffer [5]; strepy (buffer, printf("buffer argv[1]); content- %s\n", buffer);

lem 7 Explain one security problem with each of the following code snippets and suggest a defense to each security problem. 1. txtUserId getRequestString ("UserId"); txtSQL SELECT FROM Users WHERE UserId = +txtUserId; 2. char buffer [5]; strepy (buffer, printf("buffer argv[1]); content- %s\n", buffer);

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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A client with a completed main function is provided. The main function should not be modified. You must update the client by creating and implementing the various functions described below. readFile – Loads the parameter array with Billionaire objects. The data for each Billionaire is read from the given data file which is in CSV format (comma delimited - 1 line per record with fields separated by a comma.) The function should read each line from the file, pass the line read to the Billionaire class constructor and store the resulting object in the parameter array. The second parameter represents the maximum number of Billionaire objects that can be stored. displayAll - Displays a list of the Billionaires stored in the array. getRange – Determines the smallest wealth value and the largest wealth value within the array. These values are returned to the caller via reference parameters. getWealthiest – Returns the Billionaire within the array with the greatest wealth. getUS –…
2. Each student at Middlesex County College takes a different number of courses, so the registrar has decided to use linear linked lists to store each student's class schedule and an array to represent the entire student body. A portion of this data structure is shown below: link Sec cr CSC16213 →HISHO 24 $||1|| 1/1234 2/2 357 CSC236/4 37 These data show that the first student (ID: 1111) is taking section 1 of CSC162 for 3 credits and section 2 of HIS101 for 4 credits; the second student is not enrolled; the third student is enrolled in CSC236 section 4 for 3 credits. s Write a class for this data structure. Provide methods for creating the original array, inserting a student's initial class schedule, adding a course, and dropping a course. Include a menu-driven program that uses the class.
Which of the following technique stores data in a separate entity in case of a collision?a) Open addressingb) Chaining using doubly linked listc) Linear probingd) Double hashing
You can make this code connection functions between P2P machines: import threading import socket import pickle import time import struct import hashlib import os class FileManager(object): def __init__(self): self.files = {} self.download_path = "" def hash_data(self, data): hasher = hashlib.md5() hasher.update(data) return str(hasher.hexdigest()) def hashFile(self, filepath): hasher = hashlib.md5() try: with open(filepath, "rb") as afile: buf = afile.read() while len(buf) > 0: hasher.update(buf) buf = afile.read() return hasher.hexdigest() except: print("Couldn't find/hash file " + filepath) def refresh(self): for i in list(self.files): if self.files[i]["path"] is not None: if not os.path.exists(self.files[i]["path"]): print(…
C++ Complete the program that will allow the user to enter data on 10 Halloween costumes. The program will create Costume objects and then store the Costume objects in a Hash Table. The Costume ID will be the key and a pointer to the Costume object will be the value. You are given Lab7.cpp, HashEntry.h, and Costume.h and you should not have to make any changes to these files at all. You will need to write HashTable.h, which implements the HashTable class. This should NOT be a template class. Your HashTable class should resolve collisions by linear probing and should use the HashEntry class for the linkedlist nodes. Because we’re using probing, there is no removal function. This is okay for this application, since we want to keep a record of costumes that are no longer being kept in stock. ---GIVEN--- Lab.cpp #include <iostream> #include "HashTable.h" #include "Costume.h" using namespace std; int main() { int size; int key; Costume *newCostume; string name; float price;…
Threads Task # 1 Write a program using pthreads, which calculates the sum of elements in a hard-coded integer array in parallel using 4 threads. The program must divide the work between 4 threads which run simultaneously. For simplicity, you can assume that the size of the array is 100. Note that the integer array must be declared as a global data structure. Initially code your solution so that the sum of elements is maintained in a global shared variable. Each thread modifies the same shared variable as it sums up elements from the array. Use a suitable synchronization primitive (mutex)
Q4 You have just finished a Python script called "transfer.py" and decide to produce and keep a hash of the file. Six months later, you produce the hash again and discover it is different. Assuming you did not touch the file "transfer.py", what does a different hash suggest to you?
Subject code- rcs502 I will downvote, if you do anything wrong.
How many arguments may a catch block have at most?
Filename: runlength_decoder.py Starter code for data: hw4data.py Download hw4data.py Download hw4data.pyYou must provide a function named decode() that takes a list of RLE-encoded values as its single parameter, and returns a list containing the decoded values with the “runs” expanded. If we were to use Python annotations, the function signature would look similar to this:def decode(data : list) -> list: Run-length encoding (RLE) is a simple, “lossless” compression scheme in which “runs” of data. The same value in consecutive data elements are stored as a single occurrence of the data value, and a count of occurrences for the run. For example, using Python lists, the initial list: [‘P’,‘P’,‘P’,‘P’,‘P’,‘Y’,‘Y’,‘Y’,‘P’,‘G’,‘G’] would be encoded as: ['P', 5, 'Y', 3, ‘P’, 1, ‘G’, 2] So, instead of using 11 “units” of space (if we consider the space for a character/int 1 unit), we only use 8 “units”. In this small example, we don’t achieve much of a savings (and indeed the…
Write the lines of code to insert the key (book's ISBN) and value ("book") pair into "my_hash_table".
Write a program that animates quadratic probing,as shown in Figure . You can change the initial size of the hash-table in theprogram. Assume the load-factor threshold to be 0.8.