Differentiate between the message and method.
Message * Objects communicate by sending messages to each other. * A message is sent to invoke a method. Method * Provides response to a message. * It is an implementation... Read more »
‘Object Oriented Programming Interview Questions’ - KyaPoocha.com
When does a name clash occur?
A name clash occurs when a name is defined in more than one place. For example., two different class libraries could give two different classes the same name. If... Read more »
List out some of the object-oriented methodologies.
Object Oriented Development (OOD) (Booch 1991,1994). Object Oriented Analysis and Design (OOA/D) (Coad and Yourdon 1991). Object Modelling Techniques (OMT) ... Read more »
Differentiate persistent & non-persistent objects?
Persistent refers to an object’s ability to transcend time or space. A persistent object stores/saves its state in a permanent storage system with out losing the... Read more »
Differentiate Aggregation and containment?
Aggregation is the relationship between the whole and a part. We can add/subtract some properties in the part (slave) side. It won’t affect the whole part. Best... Read more »
What is meant by “method-wars”?
Before 1994 there were different methodologies like Rumbaugh, Booch, Jacobson, Meyer etc who followed their own notations to model the systems. The developers were... Read more »
Who were the three famous amigos and what was their contribution to the object community?
The Three amigos namely, James Rumbaugh (OMT): A veteran in analysis who came up with an idea about the objects and their Relationships (in particular Associations). Grady... Read more »
What is Downcasting ?
Downcasting is the casting from a general to a more specific type, i.e. casting down the hierarchy. Read more »
Can a method be overloaded based on different return type but same argument type ?
No, because the methods can be called without using their return type in which case there is ambiquity for the compiler. Read more »
What are the advantages of OOPL?
Object oriented programming languages directly represent the real life objects. The features of OOPL as inhreitance, polymorphism, encapsulation makes it powerful. Read more »
What is the difference between procedural and object-oriented programs?
1. In procedural program, programming logic follows certain procedures and the instructions are executed one after another. In OOP program, unit of program is object,... Read more »
How many ways can an argument be passed to a subroutine?
An argument can be passed in two ways. They are Pass by Value and Passing by Reference. Passing by value: This method copies the value of an argument into the formal... Read more »
What is difference between overloading and overriding?
a) In overloading, there is a relationship between methods available in the same class whereas in overriding, there is relationship between a superclass method and... Read more »
What is the difference between superclass and subclass?
A super class is a class that is inherited whereas sub class is a class that does the inheriting. Read more »
What are inner class and anonymous class?
Inner class : classes defined in other classes, including those defined in methods are called inner classes. An inner class can have any accessibility including... Read more »
What is multithreading?
Multithreading is the mechanism in which more than one thread run independent of each other within the process. Read more »
What is the difference between shadow and override?
Overriding is used to redefines only the methods, but shadowing redefines the entire element. Read more »
What is Python and what is scope of Python?
Python : Python is an interpreted, interactive, object-oriented programming language. It is often compared to Tcl, P e r l, Scheme or Java. Python combines remarkable... Read more »
If a class is declared without any access modifiers, where may the class be accessed?
A class that is declared without any access modifiers is said to have package access. This means that the class can only be accessed by other classes and interfaces... Read more »
Does a class inherit the constructors of its superclass?
A class does not inherit constructors from any of its super classes. Read more »