Guess Questions - ISC Computer Practical

Guess Questions for ISC Computer Practical


  1. Enter date of submission, number of days given to complete the project and find the date of announcement of project.

    /* 
     *  Enter date of submission, number of days given to complete
     *  the project and find the date of announcement of project.
     */
    
        import java.util.*;
        class DateOfAnnouncement
        {
        public static void main (String args[])throws InputMismatchException
        {
        Scanner scan = new Scanner(System.in);
    
        int dd, mm, yy, nod,i,tdays = 0,m;
    
        System.out.println("Enter the day, month and year of the date of announcement of the project: ");
            dd = scan.nextInt();
            mm = scan.nextInt();
            yy = scan.nextInt();
    
        System.out.println("Enter the no of days given to complete the project: ");
            nod = scan.nextInt();
    
            int dom[] = {31,28,31,30,31,30,31,31,30,31,30,31};
    
            // If it is a leap year, februrary should have 29 days.
            if(yy%4 == 0)
                dom[1] = 29;
    
            // Add the days of the month
                for(i = 0; i< mm-1; i++)
                tdays+= dom[i];
    
            // Add the days of the current month
             tdays+= dd;
    
            // Subtract the number of days given to complete the project from total days
            tdays-= nod;
    
            // Now convert the total calculated days to date
    
            // If the result is negative that means the project was announced
            // in the previous year
            if(tdays < 0)
            {
                yy--;
    
                // If the previous year was a leap year, add 366 to get the corresponding
                // day of that year else add 365
    
                if(yy%4 == 0)
                    tdays += 366;
                else
                    tdays += 365;
            }
            if(yy%4 == 0)
                dom[1] = 29;
            else
                dom[1] = 28;
            m=0;
    
            while(tdays>dom[m]){
                tdays-= dom[m];
                m++;
            }
            System.out.println("Date of announcement: " + tdays + "/" + (m+1) + "/" + yy);
    
        }//end of main
        }//end of class
    
  2. WAP to enter the current date in dd/mm/yyyy format and the day name on the 1st of January of that year. Display the name of the day on the given date.

    /* Write a program to accept a date in the string format dd/mm/yyyy
     * and accept the name of the day
     * on 1st of January of the corresponding year. Find the day for the given date.
    Example:
    INPUT Date: 5/7/2001 Day on 1st January : MONDAY
    OUTPUT  Day on 5/7/2001 : THURSDAY
    Test run the program on the following inputs:
    INPUT DATE         DAY ON 1ST JANUARY     OUTPUT DAY FOR INPUT DATE
    4/9/1998             THURSDAY                     FRIDAY
    31/8/1999            FRIDAY                       TUESDAY
    6/12/2000            SATURDAY                     WEDNESDAY
    
     The program should include the part for validating the inputs namely the date
    and the day on 1st January of that year.
      */
    
     import java.util.*;
     class CurrentDayName
     {
      public static void main (String args[])
       throws InputMismatchException
      {
       Scanner scan = new Scanner(System.in);
    
       int i,dd,mm,yy,tdays, index,r;
       String date,dayName;
    
       System.out.println("Enter a date in the string format dd/mm/yyyy: ");
            System.out.println("If the date is 9th Februaray,
            2013 enter it as 09/02/2013. ");
        date = scan.next();
    
        dd=mm=yy=0;
        // Convert the date in string format to day, month and year
       try{
            dd = Integer.parseInt(date.substring(0,2));
            mm = Integer.parseInt(date.substring(3,5));
            yy = Integer.parseInt(date.substring(6));
    
            System.out.println("Enter the name of the day on 1st of January ");
           dayName = scan.next();
    
            //Store the days of the months
           int dom[] = {31,28,31,30,31,30,31,31,30,31,30,31};
    
          //If it is a leap year, februrary should have 29 days.
          if(yy%4 == 0)
           dom[1] = 29;
    
         if(dd < 0 || dd > dom[mm-1]){
          System.out.println("Invalid date.");
         }else{
           //Store the day names of the week
           String days[] = {"Monday", "Tuesday", "Wednesday", "Thursday",
                  "Friday", "Saturday", "Sunday"};
    
           //Find the corresponding day of the year
    
          tdays = 0;
          //Add the days of the month
          for(i = 0; i < mm-1; i++)
             tdays+= dom[i];
    
       //Add the days of the current month
          tdays+= dd;
    
        index = 0;
        //Find the index of the entered day name in the day names array
       for(i = 0; i < 7; i++)
        {
         if(dayName.equalsIgnoreCase(days[i])){
           index = i;
           break;
          }
    
        }
    
      //find the index of the day in the day names array for the current day
         r = tdays%7 + index - 1;
    
           if( r >= 7)
              r -= 7;
    
         System.out.println("Day on " + date + " : " + days[r]);
       } // else
    
      }catch(Exception e){
       System.out.println("Please enter the date in the specified format.");
       System.out.println("Error : "+e);
     }
    
    }//end of main
    }//end of class
    
  3. WAP to enter two dates of the same year and find the number of days elapsed between them.

    /* Enter two dates of the same year and find the
     * number of days elapsed between them
     */
    
    import java.util.*;
    class TwoDateDiff
    {
    public static void main (String args[])throws InputMismatchException
    {
    Scanner scan = new Scanner(System.in);
    
    int d1,m1,d2,m2,y,i,total1,total2,diff;
    
        System.out.println("Enter the day and month of first date: ");
        d1 = scan.nextInt();
        m1 = scan.nextInt();
    
        System.out.println("Enter the day and month of second date: ");
        d2 = scan.nextInt();
        m2 = scan.nextInt();
    
        System.out.println("Enter the year: ");
        y = scan.nextInt();
    
    
        int dom[] = {31,28,31,30,31,30,31,31,30,31,30,31};
    
       //If it is a leap year, februrary should have 29 days.     
        if(y%4 == 0)
            dom[1] = 29;
    
         // Check for validity of date
        if(d1 < 0 || m1 > 12 || d1 > dom[m1-1] || d2 < 0 || m2 >12 || d2 > dom[m2-1]){
            System.out.println("Please enter a valid date.");
        }else{
    
    
    
            total1 = 0;
        //Add the days of the month
            for(i=0; i< m1-1; i++)
                total1 += dom[i];
    
        //Add the days of the current month
         total1+=d1;  
    
         total2 = 0;
        //Add the days of the month
            for(i=0; i< m2-1; i++)
                total2 += dom[i];
    
        //Add the days of the current month
         total2+=d2;
    
      diff = (int) Math.abs(total1 - total2);  
    
      System.out.println("Days elapsed : "+diff);
    }//else
    
    }//end of main
    }//end of class
    
  4. WAP to enter a paragraph which may be terminated by a '?', '.' or an '!'. Print the number of sentences that have 2 or more palindrome words in it.

     /*
     * WAP to enter a paragraph which may be terminated by a '?', '.' or an '!'. 
     * Print the number of sentences that have 2 or more palindrome words in it.
     */
    import java.io.*;
    class NoOfPalindromes
    {
    public static void main (String args[])throws IOException
    {
    BufferedReader br=new BufferedReader(new InputStreamReader (System.in));
    int i,p,j,f,l,count, nos=0;
    String str, word, revWord;
    char ch, ch1;
    
    System.out.print("Enter a paragraph(terminated by '?', '.' or '!') : ");
    str = br.readLine();
    l= str.length();
    p=0;
            for(i=0;i< l;i++)
            {
                ch=str.charAt(i);
    
                // check for the end of a sentence
                if(ch=='!' ||ch=='?'|| ch=='.')
                  {
                      f=0;
                      count=0;
                      //Loop to traverse through each sentence
                       for(j=p;j< i+1;j++)
                       {
                           ch1=str.charAt(j);
    
                           //Extract a word
                           if(ch1==' '||ch1=='!' ||ch1=='?'|| ch1=='.')
                           { 
    
                               word=str.substring(f,j);
    
                               //Reverse the word
                               revWord = (new StringBuffer(word).reverse()).toString();
    
                               //Count palindrome words
                               if(word.equals(revWord))
                                    count++;
    
                               f=j+1;
                            }
                        }
                        // If the sentence has two or more palindrome words increment
                        // the counter
                        if(count>=2)
                            nos++;
                     p=i+1;
                    }
                }
                System.out.println("Number of sentences with two or more palindrome
                words in it : "+nos);
            }//end of main
        }//end of class
    
  5. WAP to enter two sentences and print the common words in them.

    /*
     * WAP to enter two senteces from the user. 
     * Print the common words in them.
     */
    import java.io.*;
    class CommonWords
    {
    public static void main (String args[])throws IOException
    {
    BufferedReader br=new BufferedReader(new InputStreamReader (System.in));
    int i,j,l1,l2,p,x,y,count=0;
    String str1, str2;
    char ch;
    
    System.out.print("Enter two sentences terminated by either a '?', '.' or '!' : ");
    str1 = br.readLine();
    str2 = br.readLine();
    
    l1= str1.length();
    l2= str2.length();
    
    String s1[] = new String[l1];
    x=0;
    p=0;
    //Store all the words of the first sentence in a string array
        for(i=0;i< l1;i++)
         {
                ch = str1.charAt(i);
            if(ch == ' ' || ch == '?' || ch == '.' || ch == '!'){
                s1[x++]=str1.substring(p,i);
                p = i+1;
            }
         }
    String s2[] = new String[l1];
    y=0;
    p=0;
         //Store all the words of the second sentence in a string array
        for(i=0;i< l2;i++)
         {
                ch = str2.charAt(i);
            if(ch == ' ' || ch == '?' || ch == '.' || ch == '!'){
                s2[y++]=str2.substring(p,i);
                p = i+1;
            }
         }
    
         //Now compare the words stored in two arrays
         for(i=0;i< x;i++){
            for(j=0;j< y;j++){
            //If match is found, print the word and store blank space to avoid repetition
            if(s1[i].equalsIgnoreCase(s2[j]) && !s2[j].equals(" ")){
                System.out.println(s1[i]);
                s2[j]=" ";
            }
            }
            }
    
    
    }//end of main
    }//end of class
    
  6. Enter n sentences and merge them to form a single sentence, where n <= 10. The merged sentence should not have duplicate words and must only consist of letters and blank spaces. Any other character should be removed.

     /*
     * Enter n sentences and merge them to form a single sentence, 
     * where n <= 10. The merged sentence should not have duplicate words and must
     * only consist of letters and blank spaces. Any other character
     * should be removed.
     */
    import java.io.*;
    class MergeSentence
    {
    public static void main (String args[])throws IOException
    {
    BufferedReader br=new BufferedReader(new InputStreamReader (System.in));
    
    int n,i,j,k,p,x,l,now;
    String ms;
    char ch,t;
    
    System.out.println("Enter the no of sentences (upto 10): ");
    n = Integer.parseInt(br.readLine());
    if(n<=10){
    
    //String array to store the sentences
    String str[] = new String[n];
    
    //counter to store number of words
    now=0;
    
    System.out.println("Enter the "+n+" sentences: ");
        for(i=0;i< n;i++)
        {
            str[i]=br.readLine();
    
            //This loop is used to count the number of words in all the sentences.
            //The counter is then used to initialize the array that stores all the words
            for(j=0;j< str[i].length();j++){
                ch = str[i].charAt(j);
                if(ch == ' ' || ch == '?' || ch == '.' || ch == '!'){
                    now++;
                }
            }
        }
    
        //String array to store number of words
        String words[] = new String[now];
    
    
        x=0;
        for(i=0;i< n;i++){
            l=str[i].length();
            p=0;
            for(j=0;j< l;j++){
                ch = str[i].charAt(j);
                ms="";
                if(ch == ' ' || ch == '?' || ch == '.' || ch == '!'){
                    //Loop to access the word
                    for(k=p;k< j;k++){
                            t = str[i].charAt(k);
                            //Only add letters to the merged string
                            if((t >= 'A' && t<='Z') || (t>='a' && t<='z'))
                                ms = ms + t;
                        }
                   //Store the words in string array
                   words[x++] = ms;
                   p = j+1;
                }
            }
        }
        //Now remove duplicate words from the string array
        for(i=0;i< x;i++){
        for(j=i+1;j< x;j++){
            if(words[i].equalsIgnoreCase(words[j])){
                for(k=j;k< x-1;k++)
                    words[k] = words[k+1];
                j--; // Decrement loop counter to cater to successive duplicates
                x--;
            }
         }
        }
        for(i=0;i< x;i++){
        System.out.print(words[i]+" ");
    }
    }else{
    System.out.println("Invalid value!");
    }
    
    }//end of main
    }//end of class 
    
  7. Enter date of announcement, number of days given to complete the project and find the date of submission of project.

    /* Enter date of announcement, number of days given to complete the project and 
    * find the date of submission of project.
    */
    
    import java.util.*;
    class DateOfSubmission
    {
    public static void main (String args[])throws InputMismatchException
    {
    Scanner scan = new Scanner(System.in);
    
    int dd, mm, yy, nod,i,tdays=0,m;
    
    System.out.println("Enter the day, month and year of the date of
    announcement of the project: ");
        dd = scan.nextInt();
        mm = scan.nextInt();
        yy = scan.nextInt();
    
    System.out.println("Enter the no of days given to complete the project: ");
        nod = scan.nextInt();
    
        int dom[] = {31,28,31,30,31,30,31,31,30,31,30,31};
    
        //If it is a leap year, februrary should have 29 days.
        if(yy%4 == 0)
            dom[1] = 29;
    
        //Add the days of the month
            for(i=0; i< mm-1; i++)
            tdays+=dom[i];
    
        //Add the days of the current month
         tdays+=dd;
    
        //Add the number of days given to complete the project
        tdays+=nod;
    
        //Now convert the total calculated days to date
    
        // If the days exceed the total number of days in a year
        // Increment the year by one
    
        if(yy%4 == 0){
             if(tdays > 366){
                tdays-=366;
                yy++;
               }
        }else{
             if(tdays > 365){
                tdays-=365;
                yy++;
               }
        }
    
       if(yy%4 == 0)
            dom[1] = 29;
        else
            dom[1] = 28;
    
        m=0;
    
        while(tdays>dom[m]){
            tdays-=dom[m];
            m++;
        }
        System.out.println("Date of submission: "+tdays+"/"+(m+1)+"/"+yy);
    
    }//end of main
    }//end of class
    
  8. A number with n digits, which, when multiplied by 1, 2, 3, ..., n produces the same digits in a different order is known as a Cyclic Number. For example, 142857 is a cyclic number: 142857 x 2 = 285714; 142857 x 3 = 428571; 142857 x 4 = 571428; 142857 x 5 = 714285; 142857 x 6 = 857142, and so on. Write a program to enter a number and check if it is a cyclic number or not.

    /*
     * Write a program to enter a number and check if it is a cyclic number or not.
     */
    import java.io.*;
    class CyclicNo
    {
    //Function to arrange the digits stored in the string s in ascending order
     static String sort(String s)
     {
       String t="";
       int i,j;
       char a[] = s.toCharArray();
    
      for(i = 0; i < a.length; i++)
      {
         for(j = 0; j < a.length-i-1; j++)
         {
             if(a[j] > a[j+1])
             {
              char r = a[j];
              a[j] = a[j+1];
              a[j+1] = r;
            }
        }
    }
        for(i = 0; i < a.length; i++)
         t = t + a[i];
       return t;
     }
    public static void main(String arg[])throws IOException
    {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String w,r,p;
        int i,n;
        boolean flag = true;
    
       System.out.println("Enter a number");
            n = Integer.parseInt(br.readLine());
    
        // Convert the integer to string 
        String str = Integer.toString(n);
    
        // Sort the number 
        w = sort(str);
    
    
     for(i = 2; i <= str.length(); i++)
     {
          // Get the multiples of the number
          r = Integer.toString(n*i);
    
          // Sort the multiple
          p = sort(r);
    
            if(p.equals(w) == false)
             {
                 flag = false;
                 break;
             }
     }
            if(flag)
            System.out.println(n + " is a cyclic number");
              else
            System.out.println(n + " is not a cyclic number");
        }//end of main
     }//end of class
    
  9. A number that is smaller than the sum of its aliquot parts (proper divisors) is known as an Abundant Number. Twelve is the smallest abundant number - the sum of its aliquot parts is 1 + 2 + 3 + 4 + 6 = 16 - followed by 18, 20, 24, and 30.

     /*
     * WAP to print all the abudant numbers between m and n. 
     * A weird number is one which is smaller than the sum of its aliquot parts.
     */
    import java.util.*;
    class AbundantNo
    {
    public static void main (String args[])throws InputMismatchException
    {
    Scanner scan = new Scanner(System.in);
    int m,n,i,j,s;
    
    System.out.println("Enter the limits m and n: ");
        m = scan.nextInt();
        n = scan.nextInt();
    
        for(j=m;j<=n;j++){
            s=0;
            for(i=1;i< j;i++){
                if(j%i == 0)
                    s=s+i;
            }
            if(s>j)
            System.out.print(j+" ");
        }
    
    }//end of main
    }//end of class
    
  10. A number such that both the sum of its divisors and the number of its divisors are perfect numbers is known as a Sublime Number. The smallest sublime number is 12. There are 6 divisors of 12 - 1, 2, 3, 4, 6, and 12 - the sum of which is 28. Both 6 and 28 are perfect. Write a program to check if a number is a sublime number or not.

    /*
     * WAP to check if a number is sublime number or not.
     */
    import java.io.*;
    class SublimeNo
    {
     public static void main (String args[])throws IOException
     {
         int s=0,f=0,s1=0,s2=0,n,i,j;
    
         BufferedReader obj=new BufferedReader (new InputStreamReader(System.in));
         System.out.println("Enter a no: ");
            n=Integer.parseInt(obj.readLine());
    
         for(i=1;i<=n;i++)
         {
             if(n%i==0)
             {
                 s+=i;
                 f++;
                }
            }
            for(j=1;j< s;j++)
            {
                if(s%j==0)
                s1+=j;
            }
            for(j=1;j< f;j++)
            {
                if(f%j==0)
                s2+=j;
            }
            if(s1==s && s2==f)
            System.out.println(n+ " is a sublime number");
            else
            System.out.println(n+ " is not a sublime number");
        }
    }
    
  11. Find 1's complement of a number

    /*
     * WAP to enter a negative number in base 10 and find
     * its 1's complement.
     */
    import java.util.*;
    class OnesComplement
    {
    public static void main (String args[])throws InputMismatchException
    {
    Scanner scan = new Scanner(System.in);
    int n,i,p,b,x;
    
    System.out.println("Enter a number (in base 10): ");
        n = scan.nextInt();
        if(n< 0){
    int a[] = new int[100];
    
    p = -1*n;
    x=0;
    //Convert the number to binary
        while(p>0){
    
           b = p%2;
           a[x++] = b;
           p=p/2;
    
        }
        for(i=0; i< x; i++){
            if(a[i] == 0){
                a[i] = 1;
            }else{
                a[i] = 0;
            }
        }
        for(i=x-1; i>=0; i--){
            System.out.print(a[i]);
        }
    }else{
        System.out.println("Invalid number. Please enter a negative number.");
    } 
    }//end of main
    }//end of class
    
  12. Find 2's complement of a number

    /*
     * WAP to enter a negative number in base 10 and 
     * find its 2's complement.
     */
    import java.util.*;
    class TwosComplement
    {
    public static void main (String args[])throws InputMismatchException
    {
    Scanner scan = new Scanner(System.in);
    int n,i,p,b,x,carry;
    
    System.out.println("Enter a number (in base 10): ");
        n = scan.nextInt();
        if(n<0){
    int a[] = new int[100];
    
    p = -1*n;
    x=0;
    //Convert the number to binary
        while(p>0){
    
           b = p%2;
           a[x++] = b;
           p=p/2;
    
        }
        //Convert the array to store the 1s complement
        for(i=0; i< x; i++){
            if(a[i] == 0){
                a[i] = 1;
            }else{
                a[i] = 0;
            }
        }
        System.out.print("1s complement: ");
        for(i=x-1; i>=0; i--){
            System.out.print(a[i]);
        }
        //Add 1 to the last digit of 1s complement to get 2s complement
        a[0] += 1;
        carry = 0;
        for(i=0; i < x; i++){
            a[x] = a[x] + carry;
            if(a[x] == 2){
                a[x] = 0;
                carry = 1;
            }
        }
        System.out.print("\n2s complement: ");
        for(i=x-1; i>=0; i--){
            System.out.print(a[i]);
        }
    }else{
        System.out.println("Invalid number. Please enter a negative number.");
    } 
    }//end of main
    }//end of class
    
  13. Add two binary numbers

    /*
     * Enter two numbers in base 10, convert them in binary
     * and find their sum
     */
    import java.io.*;
    class BinarySum
    
    {
    public static void main(String args[])throws IOException
    {
        int m,n,u,v,x,y,z,p,r,i,d,e;
    
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        System.out.print("Enter the first number (base 10): ");
            m= Integer.parseInt(br.readLine());
        System.out.print("Enter the second number (base 10): ");
            n= Integer.parseInt(br.readLine());
    
        //Arrays to store numbers in binary form
        int a[]= new int [20];
        int b[]=new int [20];
    
        //Array to store the sum of binary numbers
        int c[]= new int[50];
    
        p=m;
        x=0;
        //Convert the number to binary and store in an array
        while(p>0)
        {
            a[x++]=p%2;
            p=p/2;
        }
    
        System.out.print(m+"=");
            for(i=x-1;i>=0;i--)
            {
                System.out.print(a[i]);
            }
        System.out.println();
    
        p=n;
        y=0;
        //Convert the number to binary and store in an array
        while(p>0)
        {
            b[y++]=p%2;
            p=p/2;
        }
        System.out.print(n+"=");
            for(i=y-1;i>=0;i--)
            {
                System.out.print(b[i]);
            }
        e=z=u=v=0;
    
        /*
        * To understand the following logic, you need to know binary addition.
        * In binary addition:
        *  0 + 0 = 0
        *  0 + 1 = 1
        *  1 + 0 = 1
        *  1 + 1 = 10 (read as 0 CARRY 1)
        *  1 + 1 + 1 = 11 ( read as 1 CARRY 1)
        */
    
        do{
    
            d=a[u]+b[v]+e; //Add the digits
            if(d==2){   
                c[z++]=0;
                e=1;
            }
            else if(d==3){
                c[z++]=1;
                e=1;
            }
            else{
                c[z++]=d;
                e=0;
            }
            u++;
            v++;
        }while(u < x && v < y);
    
        //If any digit is left in the first array copy them 
        // into the sum array after adding the carry
    
        if(u < x){
            while(u < x){
            d=a[u++]+e;
                if(d==2){
                    c[z++]=0;
                    e=1;
                }
                else if(d==3){
                c[z++]=1;
                e=1;
                }
                else{
                c[z++]=d;
                e=0;
                }
            }
        }
        //If any digit is left in the second array copy them 
        // into the sum array after adding the carry
        else if(v < y){
            while(v < y){
            d=b[v++]+e;
                if(d==2){
                    c[z++]=0;
                    e=1;
                }
                else if(d==3){
                c[z++]=1;
                e=1;
                }
                else{
                c[z++]=d;
                e=0;
                }
            }
        }
        //If a carry is still left copy it at the last in the sum array
        if(e==1){
            c[z++]=e;
        }
    
    System.out.print("\nSum of the two binary numbers : ");
        for(i=z-1;i>=0;i--)
        System.out.print(c[i]);
    
    }//end of main
    }//end of class  
    
  14. Enter a sentence and print it in rotation of words for all possible combinations. Ex:

      Input: java is robust
      Output: java is robust
              is robust java
              robust java is
    

    /*
     * Enter a sentence and print it in rotation of words for all possible combinations.
     */
    import java.io.*;
    class Rotation
    {
    public static void main (String args[])throws IOException
    {
    BufferedReader br=new BufferedReader(new InputStreamReader (System.in));
    
    int i,j,p,x,l;
    String s;
    char ch;
    
    System.out.println("Enter a sentence terminated by a period(.) : ");
        s = br.readLine();
        l = s.length();
    
        String a[] = new String[l];
        x=0;
        p=0;
        //Store the words in a string array
        for(i=0; i< l; i++){
            ch = s.charAt(i);
            if(ch == ' ' || ch == '.'){
                a[x++] = s.substring(p,i);
                p = i+1;
            }
        }
        System.out.println("\nOUTPUT:");
    
        //Print the sentence in rotation of words
        for(i=0; i< x; i++){
            for(j=i; j< x; j++){
                System.out.print(a[j]+ " ");
            }
            for(j=0; j< i; j++){
                System.out.print(a[j]+ " ");
            }
                System.out.println();
        }
    }//end of main
    }//end of class