In the case of UNIX, where sharing is implemented bysymbolic link○ A. the deletion of link does not affect the original file○ B. the deletion of the original file does not removethe link, but it is danglingC. both of the aboveD. none of the above A relative path name defines a pathfromA. the root directoryB. the current directoryC. from the UFD (user file directory)D. from the MFD (master file directory)

1. In the case of UNIX, where sharing is implemented by symbolic link ___________. Option C: both of…

Answered: In the case of UNIX, where sharing is…

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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If I have a file that contains a name and ID number and I would like to store them in a listed link c++ How would that be? If I assign first to the first name and last to first as well and then keep adding names and ids until last is null
You are to write a program, in $ ./Rainbow Passwords.txt Implementing a rainbow table where the file Passwords.txt contains a list of possible passwords. The password file contains a password per line, as in the provided words file and consists of strings of printable characters. Any password used must be taken from this file, so the only stored hash information needs to relate to those entries in the file. The program is used to find pre-images for given hash values. Rainbow tables can be used to solve pre-image problems for hash functions. At the simplest level they can simply be a list of hash values and the corresponding pre-images, often from some dictionary. This can be expensive in terms of storage space however, and a more efficient way of identifying pre-images involves the use of the hash function and reduction functions. First step The process is as follows: 1. Read in the list of possible passwords. Report on the number of words read in. 2. For each previously unused word…
Part C Consider the standard web log file in assets/logdata.txt. This file records the access a user makes when visiting a web page (like this one!). Each line the log has the following items: • a host (e.g., '146.204.224.152') a user_name (e.g., 'feest6811' note: sometimes the user name is missing! In this case, use '-' as the value for the username.) • the time a request was made (e.g., '21/Jun/2019:15:45:24 -0700') • the post request type (e.g., 'POST /incentivize HTTP/1.1' note: not everything is a POST!) Your task is to convert this into a list of dictionaries, where each dictionary looks like the following: example_dict = {"host":"146.204.224.152", "user_name":"feest6811", "time":"21/Jun/2019:15:45:24 -0700", "request":"POST /incentivize HTTP/1.1"} In [ ]: import re def logs(): with open ("assets/logdata.txt", "r") as file: logdata = file.read() # YOUR CODE HERE raise NotImplementedError(() In [ ]: assert len(logs()) == 979 one_item={'host': '146.204.224.152', 'user_name':…
Write a function public static int rep(LLNode<T> head, T one, T two) which replaces every occurrence of one with two in the linked listed pointed to by head. Return the number of items which were replaced.
Implement a blog server in C 1. Implement get of all posts (GET /posts), and individual post (GET /post/1) 2. Implement creation of post (POST /posts). Allow the user to enter their name, but check that they are a valid user in db. Do error checking! The user should not specify the post id; that should come from the database. 3. Write three html files to test this; serve them with the blog server: index.html shows the list of posts with a link to each. post.html shows a post. publish.html allows the creation of a new post. Link these together as a user would expect!
Consider the standard web log file in assets/logdata.txt. This file records the access a user makes when visiting a web page (like this one!). Each line of the log has the following items: • a host (e.g., '146.204.224.152') • a user_name (e.g., 'feest6811' note: sometimes the user name is missing! In this case, use '-' as the value for the username.) • the time a request was made (e.g., '21/Jun/2019:15:45:24 -0700') • the post request type (e.g., 'POST /incentivize HTTP/1.1' note: not everything is a POST!) Your task is to convert this into a list of dictionaries, where each dictionary looks like the following: example_dict = {"host": "146.204.224.152", "user_name": "feest6811", "time":"21/Jun/2019:15:45:24 -0700", "request": "POST /incentivize HTTP/1.1"} def logs (): with open("assets/logdata.txt", "r") as file: logdata = file.read() #YOUR CODE HERE raise NotImplementedError() one_item= {'host': '146.204.224.152', 'user name': 'feest6811', 'time': '21/Jun/2019:15:45:24 -0700',…
Using Python threads and the module hashlib, write an MD5 Cracker. Your script must read the file hash.txt (this file contains a single hash that needs to be cracked) and the file wordlist.txt (this file contains a list of possible words that could be the hash) to try and break the hash. “ Hashing is the process of converting a given key into another value. A hash function is used to generate the new value according to a mathematical algorithm. The result of a hash function is known as a hash value or simply, a hash.” Example of an MD5Hash is → ‘cc03e747a6afbbcbf8be7668acfebee5’ which is the word ‘test123’ To generate the MD5 hash of a string, you can use the following code: # Import module import hashlib # The string STRING = ‘test123’ # Generate Hashhash = hashlib.md5(STRING.encode()).hexdigest() # Print hashprint (hash) #This will output cc03e747a6afbbcbf8be7668acfebee5
Write a LinkedList holding CGPA of students to a text file "information". Use the appropriate LinkedList type. You can use any file writing class in Java other than object class.
Write a program that scans all directories in a UNIX file system and finds and locates all i-nodes with a hard link count of two or more. For each such file, it lists together all file names that point to a file. Explain the key steps in your code and suggest one alternative approach.
Implement all the functions from the Question 2 and make a login and sign up module, all thedata will be stored in the files and as well as in the linked list, Program will have two modules1. login2. sign upSign Up:In this module the program will ask the user to enter username, password, address, city, phonenumber, gender and will store the data in the linked list. If the username already exists in thelinked list it will ask the user to change the username, all the data will also be stored in the textfile.Login: In this module the user will enter its username and password, the program will check if the dataexists in the linked list, if yes then show “Welcome to home screen”, if not then ask the user toenter the username and password again.Work Flow:1. The program will start and all the data from the files will be loaded in the linked list.2. The login and sign up screen will pop up3. Apply proper checks, if the file exists or not (Hint: you can use try catch to handle theexceptions)…
Write a JAVA program that will maintain a phone directory using a Linked-List. The program should be able to perform the following operations: 1) Add persons details (first name, last name, phone number, city, address, sex and email) to the phone directory, where phone numbers in the directory have to be unique. (Note: each person record will store in one node in the linked-list and insert each person to the last) 2) Delete any person details by a given phone number. 3) Update telephone number by providing person first name. 4) Display all details of persons from a phone directory. 5) Search telephone number based on person first name. (Note: use sequential search to find all telephones for the given first name) 6) Sort all persons in the phone directory ascending based on person first name. (Note: use bubble or selection sort to arrange the entire phone directory) Project Outputs The output has to display a menu of choices. Then the user can select which operation want to perform.…
Write a C program that scans all directories in a UNIX file system and finds and locates all i-nodes with a hard link count of two or more. For each such file, it lists together all file names that point to a file. Explain the key steps in your code and suggest one alternative approach.

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