ISC COMPUTER PRACTICAL PAPER 2017 SOLVED

Question 2:

The result of a quiz competition is to be prepared as follows:

The quiz has five questions with four multiple choices (A, B, C, D),

with each question carrying 1 mark for the correct answer.

Design a program to accept the number of participants N such that N

must be greater than 3 and less than 11.

Create a double dimensional array of size (Nx5) to store the answers

of each participant row-wise.

Calculate the marks for each participant by matching the correct answer

stored in a single dimensional array of size 5.

Display the scores for each participant and also the participant(s)

having the highest score.

Example: If the value of N = 4, then the array would be:

Solution:

import java.util.*;
class Quiz
{
char A[][],K[];
int S[],n;

void input()
{
Scanner sc = new Scanner(System.in);
System.out.print(“Enter number of participants : “);
n = sc.nextInt();
if(n<4 || n>10)
{
System.out.println(“INPUT SIZE OUT OF RANGE”);
System.exit(0);
}
A = new char[n][5]; // Array to store the answers of every participants
K = new char[5]; // Array to store answer key
S = new int[n]; // Array to store score of every participant
System.out.println(“\n* Enter answer of each participant row-wise in a single line *\n”);
for(int i = 0; i key or not

{
S[i]++;
}
}
}
}

void printScore()
{
int max = 0;
System.out.println(“\nSCORES : “);
for(int i = 0; i if(S[i]>max)

{
max = S[i]; // Storing the Highest Score
}
}
System.out.println();

System.out.println(“\tHighest Score : “+max);

System.out.println(“\tHighest Scorers : “);
for(int i = 0; i****END*************************

Question 3:

Caesar Cipher is an encryption technique which is implemented as ROT13

(‘rotate by 13 places’).

It is a simple letter substitution cipher that replaces a letter with the

letter 13 places after it in the alphabets, with the other characters

remaining unchanged.

Write a program to accept a plain text of length L, where L must be

greater than 3 and less than 100.

Test your program with the sample data and some random data:

Example 1:

INPUT : Hello! How are you?

OUTPUT : The cipher text is:
Uryyb? Ubj ner lbh?

Example 2:

INPUT : Encryption helps to secure data.

OUTPUT : The cipher text is:
Rapelcgvba urycf gb frpher qngn.

Example 3:

INPUT : You

OUTPUT : INVALID LENGTH

Solution:

Output: