NPTEL Programming In Java Assignment 4 Answers 2022

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NPTEL Programming In Java Assignment 4 Answers 2022:- All the Answers provided here to help the students as a reference, You must submit your assignment at your own knowledge

What is Programming In Java?

With the growth of Information and Communication Technology, there is a need to develop large and complex software. Further, those software should be platform independent, Internet enabled, easy to modify, secure, and robust. To meet this requirement object-oriented paradigm has been developed and based on this paradigm the Java programming language emerges as the best programming environment. Now, Java programming language is being used for mobile programming, Internet programming, and many other applications compatible to distributed systems. This course aims to cover the essential topics of Java programming so that the participants can improve their skills to cope with the current demand of IT industries and solve many problems in their own filed of studies.

CRITERIA TO GET A CERTIFICATE

Average assignment score = 25% of the average of best 8 assignments out of the total 12 assignments given in the course.
Exam score = 75% of the proctored certification exam score out of 100

Final score = Average assignment score + Exam score

YOU WILL BE ELIGIBLE FOR A CERTIFICATE ONLY IF THE AVERAGE ASSIGNMENT SCORE >=10/25 AND EXAM SCORE >= 30/75. If one of the 2 criteria is not met, you will not get the certificate even if the Final score >= 40/100.

Below you can find the answers for NPTEL Programming In Java Assignment 2

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NPTEL Registration Steps [July – Dec 2022]
NPTEL Exam Pattern Tips & Top Tricks [2022]
NPTEL Exam Result 2022 | NPTEL Swayam Result Download

Programming In Java Assignment
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NPTEL Programming In Java Assignment 4 Answers July 2022

1. Which of these is a mechanism for naming and visibility control ofa class and its content?

a. Objects.
b. Intertaces.
c. Packages.
d. Both a and b.

Answer:- c

2. Which of the following is false statement about packages in java?

a. Packages are used to organize a set of related classes and interfaces.
b. Packages are used for preventing naming conflicts.
c. Packages provide code reusabilty.
d. Packages cannot be considered as data encapsulation.

Answer:- d

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NPTEL Programming In Java Assignment 4 Answers 2022

3. Which of the following is/are interface(s) of java.awt package?

a. CardLayout
b. Checkbox
c. Choice
d. MeuContainer

Answer:- d

4. Which of the following statement(s) is/are false?

a. The default package in the Java language is java.lang.
b. String is a final class and it is present in java.lang package.
c. Cloneable is a class present in java.lang package.
d. Thread is a class present in java.lang package.

Answer:- c

5. Consider the program given below.

What will be the output if the above program is executed?

import static java.lang.Math.' 
public class Main { 
           public static void main (String args[ ] ) { 
                      System.out.println (cos (2*PI) ) ;
             }
}
  • a. It will give compile-time eror
  • b. It will give run-time error
  • c. 1.0
  • d. 3.14
Answer:- c

6. Which of the following packages is used to includes utility classes like Calendar, Collections, Date?

a. java.lang
b. java.util
c. java.net
d. java.awt

Answer:- b

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NPTEL Programming In Java Assignment 4 Answers 2022

7. Which of the following statement(s) is/are false?

a. Comparable interface is present in java.lang package
b. Iterator interface is present in java.util package.
c. Compare() is a method used in Comparable interface.
d. Serializable interface is present in java.io package.

Answer:- c

8. Image size is too small for OCR Engine 2. Please use Engine 1.

a. public interface Question { void method(int value){ System.out.println("Nptel"); } 
b. public interface Question { void method(int value){ 
c. public interface Question { 
d. public interface Question { default void method(int value){ System.out.println("Nptel");
Answer:- b, c, d

9. Which of the following is false statement about interface in java?

a. An interface can extend other interfaces.
b. The interface body can contain abstract methods, default methods, and static methods.
c. All constant values defined in an interface are implicitly public, static, and final.
d. A static method in an interface are implicitly private.

Answer:- For Answer Click Here

10. Which of these access specifier(s) can be used for an interface?

a. Public
b. Protected
c. Private
d. Both b and c

Answer:- a

NPTEL Programming In Java Week 4 Programming Assignment Answers July 2022

Q1. Complete the code segment to execute the following program successfully. You should import the correct package(s) and/or class(s) to complete the code.

import static java.lang.System.*;

import java.util.Scanner;

Q2. Complete the code segment to print the current year. Your code should compile successfully.

java.util.Calendar current_date;  

current_date = java.util.Calendar.getInstance();	
year = current_date.get(current_date.YEAR);

Q3. The program in this assignment is attempted to print the following output: 

 interface ExtraLarge_interface
 {
	static String ext = "This is extra-large";
	void display();
}

class Large 
{
    public void Print()
    {
        System.out.println("This is large");
    }
}
 
class Medium extends Large 
{
    public void Print() 
    {
    	super.Print();  
        System.out.println("This is medium");
    }
}
class Small extends Medium 
{
    public void Print()
    {
        super.Print();  
        System.out.println("This is small");
    }
}
 
class Question43 implements ExtraLarge_interface
{
    public static void main(String[] args)
    {
        Small s1 = new Small();
        s1.Print();
		Question43 q1 = new Question43();
		q1.display();
    }
	public void display()
    {
		System.out.print(ext);
	}
}

Q4. Complete the code segment to call the default method in the interface First and Second.

   First.super.show();
  


       
   Second.super.show();

Q5. Modify the code segment to print the following output.

interface ShapeX 
{
 public String b = "This is Shape1";
 public void display1();
}


interface ShapeY extends ShapeX 
{
 public String b = "This is Shape2";
 public void display2();
}


class ShapeG implements ShapeY
{
 public String b = "This is Shape3";

 public void display1() {
  System.out.println("Circle: " + ShapeX.b);
 }

 public void display2()
 {
  System.out.print("Circle: " + ShapeY.b);
 }
}

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NPTEL Programming In Java Assignment 4 Answers Jan 2022

Q1. Complete the code segment to execute the following program successfully. You should import the correct package(s) and/or class(s) to complete the code.

Code:-

// Import the required package(s) and/or class(es)// Import the required package(s) and/or class(es)
import java.io.*;
import java.util.*;
import static java.lang.System.*;

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NPTEL Programming In Java Assignment 4 Answers 2022

Q2. Complete the code segment to print the current year. Your code should compile successfully.

Code:-

// Create an object of Calendar class. 
java.util.Calendar current ;

  // Use getInstance() method to initialize the Calendar object.
current = java.util.Calendar.getInstance();
 
  // Initialize the int variable year with the current year
year = current.get(current.YEAR);

Q3. The program in this assignment is attempted to print the following output:

Code:-

interface ExtraLarge{
 String extra = "This is extra-large";
 void display();
}

class Large {
    public void Print() {
        System.out.println("This is large");
    }
}

class Medium extends Large {
    public void Print() {
       super.Print();  
        System.out.println("This is medium");
    }
}
class Small extends Medium {
    public void Print() {
        super.Print();  
        System.out.println("This is small");
    }
  }


class Question43 implements ExtraLarge{
    public static void main(String[] args) {
        Small s = new Small();
        s.Print();
   Question43 q = new Question43();
   q.display();
    }
  public void display(){
    System.out.println(extra);
  }
}

Q4. Complete the code segment to call the default method in the interface First and Second.

Code:-

// Call show() of First interface.
First.super.show();
// Call show() of Second interface.
Second.super.show();

Q5. Modify the code segment to print the following output.

Code:-

// Interface ShapeX is created
interface ShapeX {
 public String base = "This is Shape1";
 public void display1();
}

// Interface ShapeY is created which extends ShapeX
interface ShapeY extends ShapeX {
 public String base = "This is Shape2";
 public void display2();
}

// Class ShapeG is created which implements ShapeY
class ShapeG implements ShapeY {
 public String base = "This is Shape3";
 //Overriding method in ShapeX interface
 public void display1() {
  System.out.println("Circle: " + ShapeX.base);
 }
 // Override method in ShapeY interface
  public void display2(){
  System.out.println("Circle: " + ShapeY.base);}
}

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NPTEL Programming In Java Assignment 4 Answers 2022

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Programming In Java Assignment 4 Answers 2022:- All the Answers provided here to help the students as a reference, You must submit your assignment at your own knowledge

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