Object oriented concepts UE Past Papers Questions.

Briefly explain the following terms as applied in object oriented programming.

1. A Class
2. An Object

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With examples ( if any ) describe the following terms

• Data abstraction
• Polymorphism
• Modularity
• ``is a`` relationship

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Briefly differentiate the following terms

• Methods and messages
• Procedural programming and object - oriented programming
• Class and objects
• Dynamic binding and static binding

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Consider a student registration program used by the registrar`s office. The program keeps track of students who are registered for a given semester. For each student registered, the program maintains the student`s name, address, phone number, the number of subject in which the student is enrolled and total credit hours. The program also keeps track of the total number of registered students.

• With reasons identify instances and class variables of a student class that is suitable for this program.
• Propose any three methods in the student class above.
• Implement above student class using Java.

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Consider the following scenarios and outline the objects ( at most three objects) and their interactions in terms of massages and arguments:

• A passenger buying a bus ticket
• A student borrowing a book in library
• A lecturer delivering his/her lecture to a class of students

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