Consider the following code: Will the dataMembers class be utilized during the following creation of a file and its records? public class ExampleArea public static void main(String cvhfg[]) file f = new file(); f.setRecord(4, new record("Bob's Story","Bob...")); f.setRecord(2, new record("Reita", "16 years and...")); class dataMember String title; public dataMember (String s) { title = s; class file record[] records= new record[10]; public void setRecord(int index,record r) records[index]=r; class record extends dataMember private String hold; public record(String s,String hold) super (s); this.hold=hold; O No, since records are stored instead of dataMembers O It is optional, but recommended since there is an association between record and dataMember O Only if title needs to be set for the individual records O Yes, since dataMember is the base class of record

Consider the following code: Will the dataMembers class be utilized during the following creation of a file and its records? public class ExampleArea public static void main(String cvhfg[]) file f = new file(); f.setRecord(4, new record("Bob's Story","Bob...")); f.setRecord(2, new record("Reita", "16 years and...")); class dataMember String title; public dataMember (String s) { title = s; class file record[] records= new record[10]; public void setRecord(int index,record r) records[index]=r; class record extends dataMember private String hold; public record(String s,String hold) super (s); this.hold=hold; O No, since records are stored instead of dataMembers O It is optional, but recommended since there is an association between record and dataMember O Only if title needs to be set for the individual records O Yes, since dataMember is the base class of record

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

See similar textbooks

Similar questions

def analyze_file (filename: str, pos_words: List [str], neg_words: List [str]) -> Given the name of a file, a list of positive words (all in lowercase), and a list of negative words (all in lowercase), return some interesting data about the file in a tuple, with the first item in the tuple being the positivity score of the contents of this file, and the rest of the item: being whatever else you end up analyzing. (Helper functions are highly encouraged here.) How to calculate positivity score: For every word that is pos itive in the file (based on the words in the list of positive words) add 1 to the score. For every negative word (based on the list of negative words), subtract 1 from the score. Any neutral words (those that do not appear in either list) do not affect the score in any way. pass
file operator code 1 // The FileOperator class that includes methods for file input and output 2 // Your name 3 import java.io.*; 4 public class FileOperator 5 { 6 // instance variables 7 private File m_file; 8 9 // constructor 10 // Do not make any changes to this method! 11 public FileOperator() 12 { 13 String fileName = "employeeData.txt"; 14 m_file = new File(fileName); 15 } 16 17 // This method writes an array of Employees into a physical file. 18 // Each line is in this format: "S-Optimus Prime-Computer Science-$1200" 19 // "S" represents StudentWorker ("F" represents Faculty) 20 public void writeFile(Employee[] employees) 21 { 22 // TODO: implement this method 23 } 24 }
file operator code 1 // The FileOperator class that includes methods for file input and output 2 // Maham Hameed 3 import java.io.*; 4 public class FileOperator 5 { 6 // instance variables 7 private File m_file; 8 9 // constructor 10 // Do not make any changes to this method! 11 public FileOperator() 12 { 13 String fileName = "employeeData.txt"; 14 m_file = new File(fileName); 15 } 16 17 // This method writes an array of Employees into a physical file. 18 // Each line is in this format: "S-Optimus Prime-Computer Science-$1200" 19 // "S" represents StudentWorker ("F" represents Faculty) 20 public void writeFile(Employee[] employees) 21 { 22 // TODO: implement this method 23 } 24 }
Challenge 3: Encryption.java and Decryption.java Write an Encryption class that encrypts the contents of a binary file. Your encryption program should work like a filter, reading the contents of one file, modifying the data into a code, and then writing the coded content out to a second file. The second file will be a version of the first file, but written in a secret code. Use a simple encryption technique, such as reading one character at a time, and add 10 to the character code of each character before it is written to the second file. Come up with your own encryption method. Also write a Decryption class that reads the file produced by the Encryption program. The decryption file will use the method that you used and restore the data to its original state, and write it to a new file.
Background Often, data are stored in a very compact but not human-friendly way. Think of how dishes in a menu can be stored in a restaurant database somewhere in the cloud. One way a dish object can be stored is this: { "name": "Margherita", "calories": 800, "price": 18.90, "is_vegetarian": "yes", "spicy_level": 2 } Obviously, this format is not user-readable, so the restaurant's frontend team produced many lines of code to render and display this content in a way that's more understandable to us, the restaurant users. We have a mini-version of the same task coming up. Given a list of similar complex objects (represented by Python dictionaries), display them in a user-friendly way that we'll define in these instructions. What is a "dish"? In this project, one dish item is a dictionary object that is guaranteed to have the following keys: "name": a string that stores the dish's name. "calories": an integer representing the calorie intake for one serving of the dish. "price": a float to…
Milestone #1 - Ask Quiz Type In a file called main.py, implement a program that asks the user for a quiz type and prints the file name for that quiz type. The program should have one input prompt: the integer value of the personality quiz number. Your program should print the welcome message and the list of the personality quizzes, ask for the test number, and then print the file name. You are required to use the provided dictionary with the personality quizzes names. The list of the personality quizzes should be printed in alphabetical order. See example below. Welcome to the Personality Quiz! What type of Personality Quiz do you want to run? 1 BabyAnimals 2 Brooklyn99 3 Disney 4 Hogwarts 5 MyersBriggs 6 Sesame Street 7 - StarWars 8 - Vegetables
Create a file named inventory.py. a. Define a class named Inventory. a. Define a member function named_init_ to meet the following requirements: a. Take a self object as a positional parameter. b. Take a filename string as a keyword parameter. c. Define a self.data instance variable to hold the dictionary. d. Open the filename JSON file, if it exists and contains data, assign the JSON deserialized data (a dictionary) to self.data, otherwise cleanly handle the error. b. Define a member function named add_item to meet the following requirements: a. Take a self object as a positional parameter. b. Take a barcode string as a keyword parameter. Return an integer value of 109 if the value of the barcode does not meet the required format identified in the dictionary structure above. Return an integer value of 101 if the barcode already exists in the dictionary. c. Take a description string as a keyword parameter. d. Add the item to the dictionary by setting the dictionary key to barcode and…
In java create a function searchstd() that reads a search record from a text file file.txt when the function is called in main
// Program describes two files // tells you which one is newer and which one is larger import java.nio.file.*; import java.nio.file.attribute.*; import java.io.IOException; public class DebugThirteen1 { public static void main(String[] args) { Path file1 = Paths.get("/root/sandbox/DebugDataOne1"); Path file2 = Paths.get("/root/sandbox/DebugDataOne2.txt"); try { BasicFileAttributes attr1 = Files.readAttributes(file1, BasicFileAttributes.class); System.out.println("File: " + file1getFileName()); System.out.println("Creation time " + attr1.creationTime()); System.out.println("Last modified time " + attr1lastModifiedTime()); System.out.println("Size " + attr1.size()); BasicFileAttributes attr2 = Files.readAttributes(file2, BasicFileAttributes.class); System.out.println("\nFile: " + file2.getFileName); System.out.println("Creation time " +…
REVIEW - Functions and Streams In this worksheet, you will practice writing functions involving problems that use streams (stringstreams, file streams) and String methods (find, substr) Exercise 1 Following is a code snippet for a program that reads several lines from a file¹. It prints words ignoring commas and whitespace in each line. Lastly, it prints the number of such words. //Extract each line while (getline(namelFS, line)) { int count = 0; //From the line, extract words up to comma istringstream lineSS(line); string words; while (getline(lineSS, words, ',')) { //Extract each word from the words string word2; istringstream wordSS(words); while (wordSS >> word2) { } cout << word2 << " "; ++count ; } cout << count << endl; Example file data.txt: why did the chicken cross the playground? Because, it wanted to go to the other slide! Ha, ha, ha ha Output file data_parse.txt: why did the chicken cross the playground? 7 Because it wanted to go to the other slide! 9 Ha ha ha ha 4 Let us…