Keerthika

 import java.io.File; import java.io.FileWriter; import java.io.IOException; import java.nio.file.Files; import java.nio.file.Paths; import java.util.Scanner; public class FileOperations {          public static void main(String[] args) {         Scanner scanner = new Scanner(System.in);         int choice;                  do {             System.out.println("\nFile Operations Menu:");             System.out.println("1. Create a File");             System.out.println("2. Update a File");             System.out.println("3. Delete a File");             System.out.println("4. Exit");             System.out.print("Enter your choice: ");             choice = scanner.nextI...

import java.lang.*; import java.io.*; class Questions{ public String [][]qpa;  public String[][]qca;  Questions()throws IOException { qpa=new String[10][5]; DataInputStream in=new DataInputStream(System.in); qpa[0][0]="keyboard?";  qpa[0][1]="1.input"; qpa[0][2]="2.java JavaProgram";  qpa[0][3]="3.javac JavaProgram.java"; qpa[0][4]="4.No one"; qpa[1][0]="What is the java operators?";  qpa[1][1]="1.Arithmetic operators"; qpa[1][2]="2.Relational operators"; qpa[1][3]="3.Logical operators"; qpa[1][4]="4.All of the above"; qpa[2][0]="which is the java keywords?"; qpa[2][1]="1.while"; qpa[2][2]="2.if"; qpa[2][3]="3.for"; qpa[2][4]="4.All of the above"; qpa[3][0]="Which one is the variable name?";  qpa[3][1]="1variable"; qpa[3][2]="2.@variable"; qpa[3][3]="3.while"; qpa[3][4]="4.colours"; qca=ne...