Programming in Java | NPTEL 2022 | Week 7 Programming Assignments Solutions

This article will help you with the answers of Programming in Java NPTEL 2022 Week 7 Programming Assignment Solutions.

Programming in Java NPTEL Week 7 Programming Assignment 1 Solutions

Complete the following code fragment to read three integer values from the keyboard and find the sum of the values. Declare a variable “sum” of type int and store the result in it.

// Write the appropriate statement(s) to import the package(s) you need in your program
import java.util.*;

public class Question1{ 
        public static void main (String[] args){

//Write the appropriate code to read the 3 integer values and find their sum.
          Scanner obj = new Scanner(System.in);
          int a = obj.nextInt();
          int b = obj.nextInt();
          int c = obj.nextInt();
          int sum = a + b + c;

          System.out.println(sum);
  }
}

Programming Assignment 2 Solution

Complete the code segment to catch the exception in the following, if any. On the occurrence of such an exception, your program should print “Please enter valid data” .If there is no such exception, it will print the “square of the number”.

import java.io.*;  
public class Question2{  
public static void main(String args[]){ 

 //Use appropriate Try..catch block to complete the code  
try{
  InputStreamReader r=new InputStreamReader(System.in);  
   BufferedReader br=new BufferedReader(r);  
   String number=br.readLine();  
   int x = Integer.parseInt(number);
   System.out.print(x*x);
}
catch(Exception e){
  System.out.print("Please enter valid data");
}

}
}

Programming Assignment 3 Solution

A byte char array is initialized. You have to enter an index value”n”. According to index your program will print the byte and its corresponding char value.
Complete the code segment to catch the exception in the following, if any. On the occurrence of such an exception, your program should print “exception occur” .If there is no such exception, it will print the required output.

import java.util.*;
public class Question3 {  
    public static void main(String[] args) { 
       try{	
	  byte barr[]={'N','P','T','E','L','-','J','A','V','A','J','A','N','-','N','O','C','C','S','E'};
          Scanner inr = new Scanner(System.in);
	  int n = inr.nextInt();

// Complete the code to get specific indexed byte value and its corresponding char value.

	  System.out.println(barr[n]);
	  System.out.print((char)barr[n]);

}

catch (Exception e){
	    System.out.println("exception occur");
	    }	   
    }  
}

Week 7: Programming Assignment 4 Solution

The following program reads a string from the keyboard and is stored in the String variable “s1”. You have to complete the program so that it should should print the number of vowels in s1 . If your input data doesn’t have any vowel it will print “0”.

import java.io.*;
import java.util.*;

public class Question4{  
    public static void main(String[] args) { 
	  int c=0;
         try{
            InputStreamReader r=new InputStreamReader(System.in);  
            BufferedReader br=new BufferedReader(r);  
            String s1 = br.readLine();

//Write your code here to count the number of vowels in the string "s1"

			int len = s1.length();
			String s = s1.toUpperCase();

			for(int i=0; i<len; i++) {
              char ch = s.charAt(i);
              if(ch=='A' || ch=='E' || ch=='I' || ch=='O' || ch=='U') {
                c++;
              }
	}
	
   System.out.println(c); 
	   }
       catch (Exception e){
		 System.out.println(e);
	    }	   
    }  
} 	

Week 7: Programming Assignment 5 Solution

A string “s1” is already initialized. You have to read the index “n”  from the keyboard. Complete the code segment to catch the exception in the following, if any. On the occurrence of such an exception, your program should print “exception occur” .If there is no such exception, your program should replace the char “a” at the index value “n” of the “s1” ,then it will print the modified string.

import java.util.*;
public class Question5 {  
    public static void main(String[] args) { 
       try{	
	    String s1="NPTELJAVA"; 
            Scanner inr = new Scanner(System.in);
	    int n = inr.nextInt();
            char c='a';

            //Replace the char in string "s1" with the char 'a' at index "n"  and print the modified string 

            StringBuilder str = new StringBuilder(s1);
            str.setCharAt(n,c);
            System.out.print(str);

         }

         catch (Exception e){
                System.out.println("exception occur");
	 }	   
    }  
} 

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