Programming in Java Nptel Week 2 Assignment Answers
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Programming in Java Nptel Week 2 Assignment Answers
Programming in Java Nptel Week 2 Assignment Answers (July-Dec 2024)
Q1.Which of the following is the correct way to declare a class in Java? a. public class MyClass {} b. class MyClass[] {} c. public MyClass class {} d. MyClass public class {}
Answer: a. public class MyClass {}
Q2.What is the purpose of a constructor in a class? a. To destroy objects of the class b. To create static methods c. To implement inheritance d. To initialize objects of the class
These are Programming in Java Nptel Week 2 Assignment Answers
Q5.Which of the following demonstrates constructor overloading in Java? a. Defining multiple constructors in a class with different parameter lists b. Defining multiple methods in a class with the same name c. Defining a constructor in a subclass d. Using the super keyword
Answer: a. Defining multiple constructors in a class with different parameter lists
Q6. What is the purpose of the this keyword in the context of avoiding name space collision? a. To call another constructor in the same class b. To refer to the current object c. To differentiate between instance variables and parameters with the same name d. To import another class
Answer: c. To differentiate between instance variables and parameters with the same name
These are Programming in Java Nptel Week 2 Assignment Answers
Q7. Which of the following is the correct signature of the main method in Java? a. public void main(String[] args) b. public static void main(String[] args) c. public static void main() d. public main(String[] args)
Answer: b. public static void main(String[] args)
Q8. Which class is used in Java to take runtime data input from the user? a. BufferReader b. UserInputStreamReader c. Scanner d. DataInputStreamReader
These are Programming in Java Nptel Week 2 Assignment Answers
Q9. What is the output of the following Java code snippet? (\n in output is to be assumed to be the new line character)
a. Hello World\nNumber: 10 b. Hello WorldNumber: 10 c. Hello \nWorld\nNumber: 10 d. Hello World\nNumber: 10\n
Answer: a. Hello World\nNumber: 10
Q10. How do you read a line of text from the console using the Scanner class in Java? a. scanner.readLine() b. scanner.nextLine() c. scanner.getLine() d. scanner.fetchLine()
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These are NPTEL Programming In Java Week 2 Assignment Answers
Q1. In Java programming an object can take many forms. This feature is called _______. a. Abstraction b. Polymorphism c. Encapsulation d. Inheritance
Answer: b. Polymorphism
Q2. Which of the following is a valid declaration of an object of class, say NPTEL? a. NPTEL obj = new NPTEL(); b. NPTEL obj = new NPTEL; c. obj = new NPTEL(); d. new NPTEL obj;
Answer: a. NPTEL obj = new NPTEL();
Q3. A default constructor_______________________. a. has no arguments b. has no return type c. has one argument but no return type d. has two arguments
Answer: a. has no arguments
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These are NPTEL Programming In Java Week 2 Assignment Answers
Q4. A top-level class may have which one of the following access modifiers? a. package b. private c. protected d. public
Answer: d. public
Q5. Integer in Java is a\an __________. a. Adapter class b. Inner class c. Not a class d. Wrapper class
Answer: d. Wrapper class
Q6. What is true about the new operator? a. returns a pointer to a variable b. creates a variable called new c. obtains memory for a new variable d. tells how much memory is available
Answer: c. obtains memory for a new variable
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These are NPTEL Programming In Java Week 2 Assignment Answers
Q7. Which one is not supported by OOP? a. Abstraction b. Polymorphism c. Encapsulation d. Global variables
Answer: d. Global variables
Q8. Which of the following modifiers can be used to disallow a method from being overridden? a. final b. transient c. volatile d. static
Answer: a. final
Q9. Consider the following code segment Identify the line number(s) where there is/are error(s) in the above code. a. 1 b. 2 c. 3 d. 4 and 5
Answer: b. 2
Q10. Which of the following is TRUE about print() and println() methods? a. print() prints in a single line only and multiple lines cannot be printed in any way. b. println() prints and then appends a line break. c. println() prints in a single line only and multiple lines cannot be printed. d. print() prints and then appends a line break.
Answer: b. println() prints and then appends a line break.
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These are NPTEL Programming In Java Week 2 Assignment Answers
Student student = new Student();
student.print();
School school = new School();
school.print();
Question 2 Complete the code segment to call the method print() of class given class Printer to print the following. ——————————– Hi! I am class STUDENT Hi! I class SCHOOL. ——————————–
Solution:
Printer p = new Printer();
p.print("Hi! I am class STUDENT");
p.print();
These are NPTEL Programming In Java Week 2 Assignment Answers
Question 3 Complete the code segment to call print() method of class Question by creating a method named ‘studentMethod()’.
Solution:
void studentMethod(){
print(this);
}
Question 4 Complete the code segment to call default constructor first and then any other constructor in the class.
Solution:
class Answer{
Answer(){
System.out.println("You got nothing.");
}
Answer(int marks, String type){
this();
System.out.print("You got "+marks+" for an "+ type);
}
}
These are NPTEL Programming In Java Week 2 Assignment Answers
Question 5 Complete the code segment to debug / complete the program which is intended to print ‘NPTEL JAVA’.
Q1. Following is a program given for this question. What will be the output of the above program? a. 22221010 b. 12222101 c. 22101010 d. 22221012
Answer: a. 22221010
Q2. When an array is passed to a method, what value does the method receive? a. Reference of the array. b. Copy of the array. c. First element in the array. d. Length of the array.
Answer: a. Reference of the array.
These are NPTEL Programming In Java Week 2 Assignment Answers
Q3. Following is a program given for this question. What will be the output of the above program? a. 28 b. -29 c. 30 d. -31
Answer: c. 30
Q4. How many bits are needed for float and double in Java, respectively? a. 32 and 64 b. 32 and 32 c. 64 and 64 d. 64 and 32
Answer: a. 32 and 64
These are NPTEL Programming In Java Week 2 Assignment Answers
Q5. Which of the following is a valid automatic type conversion in Java? a. short to byte b. float to long c. int to short d. int to long
Answer: d. int to long
Q6. Consider the following program and identify the output. a. 5 b. 10 c. 50 d. Compilation error
Answer: d. Compilation error
These are NPTEL Programming In Java Week 2 Assignment Answers
Q7. Which of the following is a valid declaration of an object of class say, Student? a. Student obj = new Student; b. Student obj = new Student(); c. obj = new Student(); d. new Student obj;
Answer: b. Student obj = new Student();
Q8. What is the output of the following program? a. 210 b. 120 c. 012 d. 201
Answer: c. 012
These are NPTEL Programming In Java Week 2 Assignment Answers
Q9. Consider the following piece of code. Which of the following option is the output of the above program? a. java b. npteljava c. nptel java d. nptel
Answer: d. nptel
Q10. What is the output of the following program? a. 60 b. 3011 c. 33 d. Compilation error
These are NPTEL Programming In Java Week 2 Assignment Answers
Programming In Java Programming Assignment Solution
Question 1
Complete the code segment to call the method print() of class School first and then call print() method of class Student.
Solution:
//Code
These are NPTEL Programming In Java Week 2 Assignment Answers
Question 2
Complete the code segment to call the method print() of class given class Printer to print the following. ——————————– Hi! I am class SCHOOL Hi! I class STUDENT. ——————————–
Solution:
//Code
Question 3
Complete the code segment tocall print() method of class Question by creating a method named ‘student()’.
Solution:
//Code
These are NPTEL Programming In Java Week 2 Assignment Answers
Question 4
Complete the code segment to call default constructor first and then any other constructor in the class.
Solution:
//Code
These are NPTEL Programming In Java Week 2 Assignment 2 Answers
Question 5
Complete the code segment to debug / complete the program which is intended to print ‘NPTEL JAVA’.
Programming in Java Nptel Week 2 Assignment Answers (July-Dec 2022)
Q1. What is the output of the following program?
a) 88 b) 8010 c) 64 d) 810
Answer: c) 64
Q2. Which of the following is generate API documentation in HTML format from Java source code?
a) javac b) javadoc c) javap d) java
Answer: b) javadoc
Q3. Following is a program given for this question.
What will be the output of the above program?
a) javanptel b) npteljava c) janjavanptel d) jannpteljava
Answer: b) npteljava
These are NPTEL Programming In Java Week 2 Assignment 2 Answers
Q4. What will happen during the execution of the following code for the command line input?
Consider the following input on command line and select the options with the correct output(s).
Input: A: “jan java nptel” B: 1 2 3
a) A : jannptel javanptel nptelnptel b) A : jan java nptel jan java nptel c) B : 11 21 31 d) B : 1 2 3 1
Answer: b), c)
Q5. Which of the following is/are TRUE about print() and println() methods?
a) print() prints in a single line only and multiple lines cannot be printed in any way. b) print() prints and then appends a line break. c) println() prints in a single line only and multiple lines cannot be printed. d) println() prints and then appends a line break.
Answer: d) println() prints and then appends a line break.
These are NPTEL Programming In Java Week 2 Assignment 2 Answers
Q6. What was the initial name of Java when it was first developed for embedded systems?
a) Greentalk b) Oak c) Java d) Javac
Answer: a) Greentalk
Q7. Which of the following is a valid declaration of an object of class, say Foo?
a) Foo obj = new Foo; b) obj = new Foo(); c) Foo obj = new Foo(); d) new Foo obj;
