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- help me java web (Can you guide the solution?) 1)file db DbContext public class DBContext { protected Connection connection; public DBContext() { try { String user = "sa"; String pass = "123456789"; String url = "jdbc:sqlserver://MSI:1433;databaseName=MyOrder"; Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); connection = DriverManager.getConnection(url, user, pass); } catch (ClassNotFoundException | SQLException ex) { Logger.getLogger(DBContext.class.getName()).log(Level.SEVERE, null, ex); } } } 2)public class DBContext1 { public Connection getConnection()throws Exception { String url = "jdbc:sqlserver://"+serverName+":"+portNumber +";databaseName="+dbName; Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); return DriverManager.getConnection(url, userID, password); } private final String serverName =…on 12 When database version in SQLite database is decreased then helper class will call et red O a. onCreate() d out of O b. onDowngrade() g question O c. onUpgrade() O d. onClose()Which of the following classifiers is least likely to underfit or overfit the data? Group of answer choices a) Linear b) KNN c) NN Answer with proper explanation else skip
- You need to use Java to connect with the mysql and create a simple mysql system. Databases "POS" have 4 tables 1. Staff_Info Staff_ID Staff_Name Staff_Pw Staff_Title 001 AA 1111 Manager 002 BB 2222 General Once the pos system opened, you need to ask the staff to enter the password. The manager can see the payment record if needed, which the general staff cannot. Food_Info Food_ID Food_Cat Food_Name Price 001 burger Classic burger 32 002 burger Chicken burger 38 003 side Fires 10 004 side Salad 15 005 beverage Coke 5 006 beverage Lemon Tea 8 There are only three categories of food, and 6 in total. Order_Info Order_ID Payment_ID Order_Item Order_Quantity Order_ID and Payment_ID should be automatically generated from 0001. Payment_Info Payment_ID Payment_Amount Payment_Date Payment_Time Payment_Method There are two types of…Which example uses the SOLID SRP principle correctly and does not violate it? (A or B) A. public class DatabaseParser { ParseDirectoryMapFile(); // parse directory map fileParsePasswordFile(); // parse user fileParseReviewDataFile(); // parse review data fileParseTeamFile(); // parse team CalculateGrade(); CalulateRelativeGrade(); } B public class DatabaseParser { ParseDirectoryMapFile(); // parse directory map fileParsePasswordFile(); // parse user fileParseReviewDataFile(); // parse review data fileParseTeamFile(); // parse team file} // seperately with the following: public class Calculator{ CalculateGrade(); CalulateRelativeGrade(); }Ten members of Math Club are driving to a math conference in a neighboring state. However, some of these students have dated in the past, and things are still a little awkward. Each student lists which other students they refuse to share a car with; these conflicts are recorded in the table below. What is the fewest number of cars the club needs to make the trip? Do not worry about running out of seats, just avoid the conflicts. Student: A B C D Conflicts: BEJ ADG HJ BF E AI F DJ G H B CI I EHJ J ACFI
- tion 16 The helper class method called when you need to update data in database table is ret ered O a. getCreateableDatabase() ed out of O b. getWritableDatabase() ag question O c. none of these O d. getUpdateableDatabase()All do. Else report.Using C language in visual studio,arrays,pointers,functions,and if possible using a switch case. Build an application for a car rental company. It should offer the following features: 1-• Maintain a customer database in a file: o Register / add new customers. Customer information should include ▪ Customer ID number ▪ Name ▪ Phone number o Search customer database by: ▪ Customer ID number ▪ Name ▪ Phone number And print out the matching records And an option to go back 2-• Maintain a database in a file: o Add a new vehicle to the fleet. Vehicle information should include ▪ Model year ▪ Make ▪ Model name ▪ License plate number ▪ Customer number who is currently renting vehicle o Delete a vehicle from the fleet o Rent a vehicle to a registered customer o Receive rented vehicle back from customer o Search vehicle database by any field: ▪ Model year + Make + Model name ▪ License plate number ▪ Customer number who is currently renting vehicle And print out all matching records And an…
- ObjectiveTo develop a simple database application using modern programming tools.ToolsStudents can choose either one of the programming languages C++, C#, Java, and Python as their main development platform. They can also choose either one of the database management systems SQLite, MySQL, PostgreSQL, and Microsoft SQL Server.GuidelinesEach student should agree to work with one student from the class as a teammate. Otherwise, the student works alone and gets penalized by getting at most 75% of the project grade. Teams should work independently toward the same project goal. Each team has to prepare a report presenting all the details about the work done and the job division. The number of pages should not pass twenty.Description of the ProjectThe project is to develop a simple university management system. The application should let three different kinds of users to work, namely, the student, the instructor, and the faculty coordinator. Users should have the following functionalities in…I need help with this one please, already tried but still getting a wrong answer Scenario You have been tasked with building a URL file validator for a web crawler. A web crawler is an application that fetches a web page, extracts the URLs present in that page, and then recursively fetches new pages using the extracted URLs. The end goal of a web crawler is to collect text data, images, or other resources present in order to validate resource URLs or hyperlinks on a page. URL validators can be useful to validate if the extracted URL is a valid resource to fetch. In this scenario, you will build a URL validator that checks for supported protocols and file types. Task Create two lists of strings – one list for Protocol called valid_protocols, and one list for storing File extension called valid_fileinfo. For this take the protocol list should be restricted to http, https and ftp. The file extension list should be .html, .csv and .docx. Split an input named url, and then use the first…Plot Mean, Variance and Standard Deviation using matplotlib.2.a. Write a class with name EmployeeInfo that will keep track of employees name,salary, post, and joining year. Create a text file with information of five employeesof a company. Each row in the file should contain four columns. Read this filewith python and using the EmployeeInfo class, find out the employee with highestsalary and also find out the employee with longer time with company.b. Using the EmployeeInfo class and the same file, sort the employees in ascendingorder of salary using list’s functions.