import java.util.Scanner;
import java.util.Random;
public class Main {
/**
* This class reference for object scanner is used to take input from user
* and is used in several methods of class
*/
static Scanner in=new Scanner(System.in);
/**
* This class reference for object Random is used to generate random numbers
* to take random question set from the list of question sets at the beginning
* of the quiz.
*/
static Random rand=new Random();
/**
* There are several arrays (question sets) in which question objects are
* stored. At the beginning of the quiz program chooses the random array
* and start using question objects in it. This class field is for the number
* which is used to identify each question set.
*/
static int questionSetNumber;
/**
* This method is used to make a question set (array). It takes the question
* set from the QuestionSets class. This class has a method which returns
* the question set which is asked from it to return by a random number
* (questionSetNumber)
* @return the array which is filled with the question objects.
*/
public static QuestionClass []makeQuestion()
{
QuestionClass []ques1=QuestionSets.questionSetChoice(questionSetNumber);
return ques1;
}
/**
* The main class in which the quiz is run.
* @param args the command line arguments
*/
public static void main(String[] args) {
//This is the random number which will help to take random question set
questionSetNumber=rand.nextInt(2);
//This is used to store one of the question sets
QuestionClass []ques1=makeQuestion();
String answer;
int marksGot;
int []marksArray=QuestionSets.Marks();
//quiz starts running from this loop and this is the loop which again
//repeats the quiz if asked to do so
while(true)
{
marksGot=0;
for(int i=0; i<ques1.length; i++)
{
//Calls the method to prints the question i from the question set
//and this same method asks user to give input
answer=ques1[i].questionPrint();
//Once the input is given it is sent to the following method
//to check if answer is invalid. This method also does several
//other tasks. (See its documentation)
int ans=checkValidAnswer(answer, i);
//Here option (answer) from 4 options of the question i from
//the question set is checked if it equals the option 0 of the
//question i. Option 0 contains the correct answer.
if(ques1[i].option[ans].equals(ques1[i].option[0]))
{
System.out.println();
marksGot=marksGot+marksArray[i];
}
else
{
System.out.println("\nWrong answer!!");
System.out.println();
break;
}
}//end of question set loop
//When the question set is completed, results are shown here and user
//is asked if he/she wants to attempt again
System.out.println("You Got " + marksGot +" Marks \n\nDo you want to attempt " +
"again? Press any button to continue and N to stop");
answer=in.next();
if(answer.equals("N") || answer.equals("n"))
{
System.out.println("Good Attempt!!!!");
break;
}
//If user opts to attempt again, again a question set is randomly
//selected from its list and life line is activated again
questionSetNumber=rand.nextInt(2);
ques1=makeQuestion();
System.out.println();
}//end of quiz loop
}
public static int checkValidAnswer(String answer, int questionSetNum)
{
//checks if answer is not valid
while(!answer.equals("1") &&
!answer.equals("2") &&
!answer.equals("3") &&
!answer.equals("4") &&
!answer.equals("5") &&
!answer.equals("F") &&
!answer.equals("f"))
{
System.out.print("Invalid Choice! \nEnter your Answer here: ");
answer=in.next();
}//end of loop to check validity of answer
return Integer.parseInt(answer);
}
}
////////////////////////////////////////////////////////////////////////
public class QuestionSets {
public static QuestionClass [] questionSetChoice(int randomNum)
{
if(randomNum==0)
{
return questionSet1();
}
return questionSet1();
}
public static QuestionClass [] questionSet1()
{
QuestionClass [] questionList=new QuestionClass[9];
System.out.println("@@@ " + "PRESS 1, 2, 3, 4 OR 5 TO CHOOSE YOUR OPTION AND PRESS ENTER TO CHECK YOUR" + " ANSWER"+ " @@@");
questionList[0]=new QuestionClass("Q1. A constructor","Must have the same name as the class it is declared within.","Is used to create objects.","May be declared private ","1 & 3","All of these","All of these");
questionList[1]=new QuestionClass("Q2. What are the two parts of a value of type double?", "significant digits ","length ","exponent ","1 & 3 ", "None Of these","1 & 3 ");
questionList[2]=new QuestionClass("Q3. What does the following line of code mean? \n double table[]; ","table is a variable that refers to an array ","table is a variable to refers to a real number ","table is a variable that refers to two numbers ","It is not legal Java code ","table is a variable to refers to a complex number","table is a variable that refers to an array ");
questionList[3]=new QuestionClass("Q4. The following is NOT an example of a data type.","int ","public ","button ","type ","float","public ");
questionList[4]=new QuestionClass("Q5. The data type for numbers such as 3.14159 is: ","float ","String ","int ","real ","double ","double ");
questionList[5]=new QuestionClass("Q6. SQL stands for? ","System Query language ","Structured Query language ","Systematic Query language ","Serial Query language ","None of the above ","Structured Query language ");
questionList[6]=new QuestionClass("Q7. Database Management System is a?","Software ","Hardware ","Both are true ","Malware ","None of these","Software ");
questionList[7]=new QuestionClass("Q8. In object oriented software design ‘inheritence’ is a kind of","optimization ","testing ","relationship ","instance ","module ","relationship ");
questionList[8]=new QuestionClass("Q9. In relational database the column of relation is called: ","table ","relation ","entity ","attribute ","object","attribute ");
return questionList;
}
public static int []Marks()
{
int [] Point=new int[9];
Point[0]=4;
Point[1]=4;
Point[2]=4;
Point[3]=4;
Point[4]=4;
Point[6]=4;
Point[7]=4;
Point[8]=4;
return Point;
}
}
////////////////////////////////////////////////////////////////////////import java.util.Scanner;
public class QuestionClass {
String questionLine;
String []option=new String[6];
static Scanner in=new Scanner(System.in);
public QuestionClass(String quest, String opt1, String opt2,
String opt3, String opt4, String opt5, String correct)
{
questionLine=quest;
option[1]=opt1;
option[2]=opt2;
option[3]=opt3;
option[4]=opt4;
option[5]=opt5;
option[0]=correct;
}
public String questionPrint()
{
System.out.println(questionLine);
System.out.println();
System.out.println("1. "+ option[1]);
System.out.println("2. "+ option[2]);
System.out.println("3. "+ option[3]);
System.out.println("4. "+ option[4]);
System.out.println("5. "+ option[5]);
System.out.println();
String answer=in.next();
return answer;
}
}
