Download JNTUH MCA 3rd Sem R15 2018 June-July 823AD Java Programming Question Paper

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Code No: 823AD R15

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JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

MCA III Semester Examinations, June/July - 2018

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JAVA PROGRAMMING

Time: 3hrs Max.Marks:75

Note: This question paper contains two parts A and B.

Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.

PART - A

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5 x 5 Marks =25

1. a) Define autoboxing and unboxing. [5]

b) Define the syntax for creation of inner class. [5]

2. a) Differentiate treemap and hashmap. [5]

b) Define daemon threads. [5]

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3. a) Define the syntax for checkbox with example. [5]

PART -B

5 x 10 Marks =50

4. a) Explain about the following a) abstraction b) encapsulation c) dynamic binding d) inheritance [10]

OR

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b) Write a short note on public, private and protected access specifiers. Explain about copy constructor. [5+5]

5. a) What is a nested class? Differentiate between static nested classes and non-static nested classes.

OR

b) How to define a package? How to access, import a package? Explain with examples. [5+5]

6. a) Discuss various forms of inheritance.

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OR

b) Give an example for function overloading and explain. [5+5]

7. a) Illustrate with an example the usage of TreeSet and TreeMap classes.

OR

b) Differentiate vector and arraylist with examples. [5+5]

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8. a) Explain collection frame work with examples. [10]

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9. a) What is meant by user-defined exceptions? Demonstrate with example.

OR

b) Explain the procedures to create a new thread. [5+5]

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10. a) What is an exception? What are the benefits of exception handling?

OR

b) Explain with suitable example java programs the following: 1) Rethrowing an exception. ii) Method Specifying exceptions. [5+5]

11. a) Explain delegation event model.

OR

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b) Write a JAVA program for handling key events. [5+5]

12. a) Write a JAVA program that works as simple calculator. Use a grid layout to arrange buttons for digits and for the +, -,*, % operations. Add a text field to display the result. [10]

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