MCA2030- OBJECT ORIENTED PROGRAMMING – C++

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(WINTER 2014) ASSIGNMENT

PROGRAM	MCA (Revised Fall 2012)
SEMESTER	2
SUBJECT CODE & NAME	MCA2030- OBJECT ORIENTED PROGRAMMING – C++
CREDIT	2
BK ID	B1641
MAX.MARKS	60

Note: Answer all questions. Kindly note that answers for 10 marks questions should be approximately of 400 words. Each question is followed by evaluation scheme.

1. Differentiate between Constructors and Destructors.

Answer : Constructor:

1. Constructor is used to initialize the object.

2.Constructor can takes parameters/arguments.

3.Constructor overloading is possible means more than one constructors can be defined in the same class.

4.constructor can be used to initialize the me

2. Differentiate between Classes and Objects. Write an example program to represent a class and its object.

Answer : Class vs Object in Java

Some difference between class and object, which is totally based upon practical experience :

1) A class is what you create while coding, but object is created at runtime by your execution environment e.g. JVM. Though you write code, which is required to create object during coding e.g.new Student(), object is not created at that time. They are only created when you run your program, and when runtime executes that line. Usually constructor of a class is called when an object is created in Java, but yes there

3. Describe operator overloading. Which are the operators that cannot be overloaded?

Answer : Operator overloading is a technique by which operators used in a programming language are implemented in user-defined types with customized logic that is based on the types of arguments passed.

Operator overloading facilitates the specification of user-defined implementation for operations wherein one or both operands are of user-defined class or structure type. This helps user-defined types to behave much like the fundamental primitive data types. Operator overloading is helpful in cases where the operators used for certain types provide semantics related to the domain context and syntactic support as found in

4. What are the advantages of Polymorphism? How it can be implemented?

Answer : Polymorphism is the ability to exist in different forms. OOP allows objects belonging to different data types to respond to calls of methods of the same name, each one according to an appropriate type-specific behavior.

Polymorphism defines the functionality of difference with a single name / interface. Different types of actions are defined by using one entity / method, which saves the time in investing the name of different method names. The action is determined by the common nature of the action. For example, adding integers and floating point

5. Differentiate between Containers and Iterators

Answer : Containers and iterators

If you don’t know how many objects you’re going to need to solve a particular problem, or how long they will last, you also don’t know how to store those objects. How can you know how much space to create? You can’t, since that information isn’t known until run time.

The solution to most problems in object-oriented design seems flippant: you create another type of object. For the storage problem, the new type of object holds other objects, or pointers to objects. Of course, you can do the same thing with an array, but there’s more. This new type of object, which is typically referred to in C++ as a container (also called a collection in some languages), will expand itself whenever necessary to accommodate everything you place inside it. So you don’t need to know how many objects you’re going to hold in

6. Describe the two basic exception handling models.

Answer : Exception handling is the process of responding to the occurrence, during computation, of exceptions – anomalous or exceptional conditions requiring special processing – often changing the normal flow of program execution. It is provided by specialized programming language constructs or computer hardware mechanisms.

An exception is a problem that arises during the execution of a program. An exception can occur for many different reasons, including the following:

·         A user has entered invalid data.

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