Programming in Java Nptel Week 5 Assignment Answers

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Programming in Java Nptel Week 5 Assignment Answers (July-Dec 2024)

1. Which exception will be thrown by parseInt() method in Java?
a. IntegerOutOfBoundException
b. IntegerFormatException
c. ArithmeticException
d. NumberFormatException

Answer: d. NumberFormatException

2. What will be the output of the following program?

a) QQQQPPPP
PPPPQQQQ

b) PPPPQQQQ
QQQQPPPP

C) PPPPPPPP
QQQQQQQQ

D) Compilation error

Answer: a) QQQQPPPP
PPPPQQQQ

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3. What will be the output of the following code?
a. 4
b. 6
c. 2
d. 8

Answer : a. 4

4. A method that potentially generates a checked exception must include this keyword in its method signature:
a. throw
b. extend
c. throws
d. extends

Answer: c. throws

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These are Programming in Java Nptel Week 5 Assignment Answers

5.Which of the following statements is true about Java’s finally block?
a. The finally block is only executed if an exception is thrown in the try block
b. The finally block is only executed if an exception is thrown in the catch block
c. The finally block is only executed if an exception is not thrown in the try or catch block
d. The finally block is executed regardless of whether an exception is thrown in the try or catch block

Answer: d. The finally block is executed regardless of whether an exception is thrown in the try or catch block

6. Which of the following statements is true about exception handling in Java:
a. A try block can have many catch blocks but only one finally block
b. A try block can have many catch blocks and many finally blocks
c. A try block must have one finally block for each catch block
d. A try block must have at least one catch block to have a finally block

Answer: a. A try block can have many catch blocks but only one finally block

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7. What will be the output of the following program?
a. Hello
b. World
c. HelloWOrld
d. WorldWorld

Answer: d. WorldWorld

8. What will be the output of the following Java code?
a. Hello
b. World
c. HelloWOrld
d. Compilation Error

Answer: c. HelloWOrld

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9. What will be the output of the following Java program?
a. 0 0
b. 2 2
c. 4 1
d. 1 4

Answer: c. 4 1

10.Which of the following exceptions is not a subclass of the RuntimeException class?
a. NullPointerException
b. ArrayIndexOutOfBoundsException
c. IOException
d. ArithmeticException

Answer: c. IOException

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Programming in Java Nptel Week 5 Assignment Answers (JAN-APR 2024)

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Q1. Which of the following is an incorrect statement about interfaces?
a. Interfaces specifies what class must do but not how it does.
b. Interfaces are specified public if they are to be accessed by any code in the program.
c. All variables in interface are implicitly final and static.
d. All variables are static and methods are public if interface is defined public.

Answer: d. All variables are static and methods are public if interface is defined public.

Q2. How do you access a static method of an interface?
a. Using the interface name
b. Using the method name directly
c. Through an object of the interface
d. Through an implementation class

Answer: a. Using the interface name

Q3. What is the output of the below Java program with an Interface?
a. 1000
b. 2000
c. Compiler error
d. None of the above

Answer: c. Compiler error

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These are Programming in Java Week 5 Solutions

Q4. What happens when we access the same variable defined in two interfaces implemented by the same class?
a. Compilation failure
b. Runtime Exception
c. The JVM is not able to identify the correct variable
d. The interfaceName.variableName needs to be defined

Programming in Java Nptel Week 5 Assignment Answers (JULY-DEC 2023)

Course Name: Programming In Java

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These are Programming in Java Nptel Week 5 Answers

Programming Assignment

Question 1
An interface Number is defined in the following program. You have to declare a class A, which will implement the interface Number. Note that the method findSqr(n) will return the square of the number n.

Solution:

class A implements Number {
	 int i, square;
	 public int findSqr(int i) {
		 square=i*i;
            return square;
      }
}

Question 2
This program is to find the GCD (greatest common divisor) of two integers writing a recursive function findGCD(n1,n2). Your function should return -1, if the argument(s) is(are) other than positive number(s).

Solution:

class B implements GCD {
    int n1,n2;

    public int findGCD(int n1, int n2){
		if(n1==0&& n2==0) {
			return -1;
		}
		else if(n2 == 0){
			return n1;
		}

		else {
			return findGCD(n2, n1%n2);
		}
      }
 }

Question 3
Complete the code segment to catch the ArithmeticException in the following, if any. On the occurrence of such an exception, your program should print “Exception caught: Division by zero.” If there is no such exception, it will print the result of division operation on two integer values.

Solution:

int result;
       a = input.nextInt();
       b = input.nextInt();

         try {
              result = a/b;
              System.out.print(result);
     	     }
          catch (ArithmeticException e) {
             System.out.print("Exception caught: Division by zero.");
          }

Question 4
In the following program, an array of integer data to be initialized. During the initialization, if a user enters a value other than integer value, then it will throw InputMismatchException exception. On the occurrence of such an exception, your program should print “You entered bad data.” If there is no such exception it will print the total sum of the array.

Solution:

try
      {
        for(int i=0;i<length;i++)
        {
          int userInput=sc.nextInt();
          name[i] = userInput;
          sum=sum+name[i];
        }
        System.out.print(sum);
       }
      catch(InputMismatchException e)
      {
        System.out.print("You entered bad data.");
      }

Question 5
In the following program, there may be multiple exceptions. You have to complete the code using only one try-catch block to handle all the possible exceptions.
For example, if user’s input is 1, then it will throw and catch “java.lang.NullPointerException“.

Solution:

try{
  switch (i)
  {
    case 0 :  int zero = 0;
    j = 92/ zero;
    break;
    case 1 :  int b[ ] = null;
    j = b[0] ;
    break;
    default:  System.out.print("No exception");
  }
}
catch (Exception e)
{
  System.out.print(e) ;
}

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Programming in Java Nptel Week 5 Assignment Answers (JAN-APR 2023)

Course Name: Programming in Java

Course Link: Click Here

These are Programming in Java Week 5 Answers

Q1. Consider the following program.
If the program is executed, then what will be the output?
a. 22
b. 33
c. 23
d. 32

Answer: c. 23

Q2. Consider the following piece of code.
‘Which of the following statement(s) is/are true for the above code?
a. Itis an empty interface.
b. Itis a tag interface.
c. It is a marker interface.
d. Itis a nested interface.

Answer: a, b, c

Q3. What is the output of the following code?
a. java
10
b. java
20
c. 10
java
d. 20
java

Programming Assignment

Question 1

Complete the code segment to catch the ArithmeticException in the following, if any. On the occurrence of such an exception, your program should print “Exception caught: Division by zero.” If there is no such exception, it will print the result of division operation on two integer values.

Solution:

int result;
a = input.nextInt();
b = input.nextInt();
try{
    result = a/b;
    System.out.println(result);
}
catch (ArithmeticException e){
    System.out.println("Exception caught: Division by zero.");
}

Question 2

In the following program, an array of integer data to be initialized. During the initialization, if a user enters a value other than integer value, then it will throw InputMismatchException exception. On the occurrence of such an exception, your program should print “You entered bad data.” If there is no such exception it will print the total sum of the array.

Solution:

try{
    for(int i=0;i<length;i++){
        int userInput=sc.nextInt();
        name[i] = userInput;
        sum=sum+name[i];
        }
        System.out.println(sum);
}
catch(InputMismatchException e){
    System.out.println("You entered bad data.");
}

These are Programming in Java Week 5 Answers

Question 3

In the following program, there may be multiple exceptions. You have to complete the code using only one try-catch block to handle all the possible exceptions.
For example, if user’s input is 1, then it will throw and catch “java.lang.NullPointerException“.

Solution:

try{
    switch (i){
        case 0 :
            int zero = 0;
            j = 92/ zero;
            break;
            case 1 :
                int b[ ] = null;
                j = b[0] ;
                break;
                default:
                System.out.println("No exception");
            }
    }
    catch (Exception e){
        System.out.println(e);
    }

Question 4

An interface Number is defined in the following program. You have to declare a class A, which will implement the interface Number. Note that the method findSqr(n) will return the square of the number n.

Solution:

class A implements Number{
    int i, square;
    public int findSqr(int i){
        square=i*i;
        return square;
        }
}

These are Programming in Java Week 5 Answers

Question 5

This program is to find the GCD (greatest common divisor) of two integers writing a recursive function findGCD(n1,n2). Your function should return -1, if the argument(s) is(are) other than positive number(s).

Solution:

class B implements GCD{
    int n1,n2;
    public int findGCD(int n1, int n2){
        if(n1==0&& n2==0){
            return -1;
        }
        else if(n2 == 0){
            return n1;
        }
        else{
            return findGCD(n2, n1%n2);
        }
        }
}

These are Programming in Java Week 5 Answers

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