Published by: sadikshya
Published date: 24 Jun 2021
This is the question set along with answers of 2017 Spring Object-Oriented Language, which was taken by Pokhara University.
POKHARA UNIVERSITY
| Level: Bachelor | Semester – Spring | Year: 2017 |
| Program: BCIS | Full Marks: 100 | |
| Course: Object-Oriented Language(Java) | Pass Marks: 45 | |
| Time:3hrs | ||
| Candidates are required to give their answers in their own words as far as practicable. | ||
| The figures in the margin indicate full marks. | ||
Section “A”
Very Short Answer Questions
| Attempt all the questions. | 10×2 | |
| 1 | Explain in brief JDK, JRE & JVM. | 2 |
| 2 | What do you mean by Autoboxing and Auto-unboxing? | 2 |
| 3 | Differentiate instance variable and static variable. | 2 |
| 4 | What is the use of the final keyword in java? | 2 |
| 5 | List all types of primitive data types available in java. | 2 |
| 6 | How we can create a thread in java? | 2 |
| 7 | What do you mean by package? Why package is important? | 2 |
| 8 | Differentiate String Buffer and String Builder class. | 2 |
| 9 | What is the purpose of the Simple Date Format class? | 2 |
| 10 | Why swing is better than AWT. Give any two reasons? | 2 |
The answer to the above 10 questions
Section “B”
Descriptive Answer Questions
| Attempt any six questions | 6×10 | |
| 11 | a) What is a constructor? Explain constructor overloading with an example.
b) Differentiate between Abstract classes and Interfaces. |
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| 12 | a) Explain different types of exception available in java? How Exception can be handled in java. Explain.
b) What is thread priority? Write a program to create multiple threads and set different priority to run the thread on priorities basis. |
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| 13 | Explain Byte Streams and Character Streams. What is the purpose of Data Input Stream and Data Output Stream classes? Write a program to write an integer, double and Boolean data in a file called “data.txt”. And again read those data from the file and display it in the console. | |
| 14 | a) Explain layout managers that are available in Java.
b) Write a command-line argument program to accept three numbers and find the smallest one. |
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| 15 | a) What are Collections? Explain the uses of Array List with an example.
b) Write a program that takes two strings from the user and check whether they are identical or not. |
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| 16 | a) What are the advantages of using the Set interface in comparison to List? Write a program demonstrating the use of Map and HashMap.
b) What is wrapper class? Explain wrapper classes available in java. |
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| 17 | What is Inheritance? Explain types of inheritance with suitable figure and example. Explain why multiple inheritances are not supported by java. |
Section “C”
| Case Analysis | ||
| 18 |
ABC Company approaches to develop desktop-based application software of Student Management System. They have divided the software development process into 3 phases. In the first phase, they need “Login System and Employee Registrations”. The “Login System” looks like below: PICTURE
PICTURE i. You are required to design the GUI same as in the above figure of Login GUI. ii. You are required to design the GUI same as in the above figure of Register User GUI. iii. In the “Register User” screen, when the user clicks on the “Add” button, then all the supplied information is received and displays to the user with the help of the dialogue box of J Option Pane. |