MCA2030- OBJECT ORIENTED PROGRAMMING – C++

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(FALL 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. Write short notes on:

a) Inheritance

Answer : Inheritance:-Inheritance means using the Pre-defined Code This is very Main Feature of OOP With the advantage of Inheritance we can use any code that is previously created. With the help of inheritance we uses the code that is previously defined but always Remember, We are only using that code but not changing that code.

With the Advent of inheritance we are able to use pre-defined code and also able to add new code. All the pre-defined code is reside into the form of classes if we want to use that code then we have to inherit or extend that class.

b) Polymorphism

Answer : Polymorphism is the ability to use an operator or method in different ways. Polymorphism gives different meanings or functions to the operators or methods. Poly, referring to many, signifies the many uses of these operators and methods. A single method usage or an operator functioning in many ways can be called polymorphism. Polymorphism refers to codes, operations or objects that behave differently in different contexts.

2. Differentiate between pass by value and pass by reference

Answer : When passing parameters, what it is called and what happens can be confusing. It is less essential that you call it the "correct" thing than you know exactly what is happening. It is critical to have a good mental model, a valid memory picture of the process.

Recall that when you call a function, a chunk of memory called an activation record is allocated. Critical to the discussion here is that this memory holds the formal parameter values and function local variables.

3. 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 memory dynamically.

5.Constructor indirectly use the new operator to initilize the objects.

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 values. The action is common. One interface, and multiple methods is the concept of polymorphism

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-

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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