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What are object-oriented concepts?

Posted By :Shashi Ray     Posted Date :December 01, 2009    Points :10   Category :.NET Framework 

You can also find related Interview Question to What are object-oriented concepts?  below: 

What is Object Oriented model?

This model is based on collection of objects. An object contains values stored in instance variables with in the object. An object also contains bodies of code that operate on the object. These bodies of code are called methods. Objects that contain same types of values and the same methods are grouped together into classes. (More...)

What is Object-oriented analysis and design ?

Object-oriented analysis and design (OOAD) is a software engineering method to model a system as a group of interactive objects. Here each object characterized by a class. (More...)

what is the difference between object based and object oriented programming language?

object based language such as VB 6.0. The main difference is about the pureness of OO nature.VB 6.0 does not handle each and every thing as an object VB.NET or C# or Java does so (More...)

Difference between Object Base and Object Oriented ?

In object oriented you use build in class, template class and also define your own class but in object base we can only use build in class User cannot create his own class.
Thats all. (More...)

What are the OOPS concepts?

1) Encapsulation: It is the mechanism that binds together code and data in manipulates, and keeps both safe from outside interference and misuse. In short it isolates a particular code and data from all other codes and data. A well-defined interface controls the access to that particular code and data.

2) Inheritance: It is the process by which one object acquires the properties of another object. This supports the hierarchical classification. Without the use of hierarchies, each object would need to define all its characteristics explicitly. However, by use of inheritance, an object need only define those qualities that make it unique within its class. It can inherit its general attributes from its parent. A new sub-class inherits all of the attributes of all of its ancestors.

3) Polymorphism: It is a feature that allows one interface to be used for general class of actions. The specific action is determined by the exact nature of the situation. In general polymorphism means "one interface, multiple methods", This means that it is possible to design a generic interface to a group of related activities. This helps reduce complexity by allowing the same interface to be used to specify a general class of action. It is the compiler's job to select the specific action (that is, method) as it applies to each situation. (More...)

What is a Null object?

It is an object of some class whose purpose is to indicate that a real object of that class does not exist. One common use for a null object is a return value from a member function that is supposed to return an object with some specified properties but cannot find such an object. (More...)

What is Set-at-a-time or Set-oriented?

The High level or Non-procedural DML can specify and retrieve many records in a single DML statement. This retrieve of a record is said to be Set-at-a-time or Set-oriented. (More...)

How can I look up a parent class method or property of any System-level object?

Use the Class View window, accessed from the standard toolbar by clicking View | Class View. (More...)

What is object Reference Tracing?

Object Reference Tracing is record sequential stack traces each time whenever object reference counter is incremented or decremented. These traces help to detect object reference errors, double-dereferencing, failure to reference. (More...)

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