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Exam_System.java

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+//Shreyas Sapkal
+//Java Programming
+//Task-4 Online Examination System
+import java.util.HashMap;
+import java.util.Scanner;
+public class Exam_System{
+Scanner input=new Scanner(System.in);
+HashMap<String,Integer> data=new HashMap<String,Integer>();
+
+	public void login() {
+		data.put("Shreyas",1234); //username and password
+		data.put("Yash",2345);
+		System.out.println("\n\nWELCOME TO EXAM PORTAL---");
+		String userid;
+		int pwd;
+		System.out.println("Login to continue...");
+		System.out.print("Enter user id : ");
+		userid=input.next();
+		System.out.print("Enter password : ");
+		pwd=input.nextInt();
+		if(data.containsKey(userid) && data.get(userid)==pwd) {
+			System.out.println("Login sucessful");
+				option_menu();
+		}
+		else {
+			System.out.println("SORRY!!! Invalid Login");
+			System.out.println("Try again");
+				login();
+		}
+	}
+	public void option_menu() {
+		int select;
+		System.out.println("Enter the option you want to perform");
+		System.out.println("1.Update profile and password");
+		System.out.println("2.Start the exam");
+		System.out.println("3.Logout");
+		select=input.nextInt();
+		switch(select) {
+		case 1:
+			data=update();
+			option_menu();
+			break;
+		case 2:
+			exam_que();
+			option_menu();
+			break;
+		case 3:
+			System.exit(0);
+			break;
+		default:
+			System.out.println("Invalid entry");
+		}
+	}
+	public HashMap<String,Integer> update(){
+		String upser;
+		int upwd;
+		System.out.println("Welcome to Update profile");
+		System.out.println("Enter user name");
+		upser=input.next();
+		if(data.containsKey(upser)) {
+		System.out.println("Enter new password you to want to update to your profile");
+		upwd = input.nextInt();
+		data.replace(upser, upwd);
+		}
+		else {
+			System.out.println("User doesn't exist");
+		}
+		return data;
+	}
+public void exam_que() {
+	long examtime=System.currentTimeMillis();
+	long endtime=examtime+30;
+	int answer_count=0;
+	int ans,score;
+	System.out.println("Start the exam");
+
+	//Question Start From Here 
+
+	while(System.currentTimeMillis()<endtime) {
+		System.out.println("You have 5 minutes to answer 5 questions");
+		System.out.println("Each question carries 5 marks"+" "+"-1 for wrong answer");
+
+        System.out.println("\n\nWho invented Java Programming?");
+		System.out.println("1)James Gosling"+"\t"+"2)Bjarne Stroustrup"+"\t"+"3)Guido van Rossum"+"\t"+"4)Dennis Ritchie");
+		System.out.println("Enter correct option");
+		ans=input.nextInt();
+		System.out.println("Answer Saved");
+		if(ans==1) {
+			answer_count++;
+		}
+
+		System.out.println("\n\n Which keyword is used for accessing the features of a package?		");
+		System.out.println("\n1) package"+"\t"+"2) import"+"\t"+"3) extends"+"\t"+"4)export");
+		System.out.println("Enter correct option");
+		ans=input.nextInt();
+		System.out.println("Answer Saved");
+		if(ans==2) {
+			answer_count++;
+		}
+		System.out.println("\n\nWhich of the following is not a Java features?");
+		System.out.println("1)Dyanamic"+"\t"+"2)Architecture Neutral"+"\t"+"3)Use of Pointers"+"\t"+"4)JIT");
+		System.out.println("Enter correct option");
+		ans=input.nextInt();
+		System.out.println("Answer Saved");
+		if(ans==2) {
+			answer_count++;
+		}
+
+		System.out.println("\n\n Which method of the Class.class is used to determine the name of a class represented by the class object as a String?");
+		System.out.println("1) getClass()"+"\t"+"2) Intern()"+"\t"+"3) getName()"+"\t"+"4) toString()");
+		System.out.println("Enter correct option");
+		ans=input.nextInt();
+		System.out.println("Answer Saved");
+		if(ans==4) {
+			answer_count++;
+		}
+		System.out.println("\n\nWhich of the following is a reserved keyword in Java?");
+		System.out.println("1) object"+"\t"+"2) strictfp"+"\t"+"3) main"+"\t"+"4) system");
+		System.out.println("Enter correct option");
+		ans=input.nextInt();
+		System.out.println("Answer Saved");
+		if(ans==1) {
+			answer_count++;
+		}
+		break;
+	}
+	System.out.println("You have finished the exam");
+	score=answer_count*10-((5-answer_count)*5); //Score Counting 
+	System.out.println("Your score is..."+" "+score+"/50");	
+}
+
+public static void main (String[] args)
+{
+	Exam_System log =new Exam_System();
+		log.login(); //function calling
+}
+}