Question
Which type of relationship between classes in OOP is
best represented when one class is a part of another class but can exist independently?Solution
Aggregation is a type of association that represents a "whole-part" relationship between two classes. The key characteristic is that the part (child object) can exist independently of the whole (parent object). For instance, in a Team class and Player class, a Player can exist without being associated with a Team . Aggregation is implemented by using references, where one class has an attribute referencing another class. This design principle promotes flexibility and modularity. Aggregation is often represented with a hollow diamond in UML diagrams. Why Other Options Are Wrong Option B : "Inheritance" Inheritance represents an "is-a" relationship, not a "whole-part" relationship. It is used to share functionality between classes, not to model part-whole dependencies. Option C : "Composition" Composition is similar to aggregation but with a crucial difference: the part cannot exist independently of the whole. For example, a Car and its Engine share a composition relationship because an engine has no meaning outside the car. Option D : "Association" Association is a broader concept that describes any relationship between classes. Aggregation is a specific type of association. Option E : "Polymorphism" Polymorphism is unrelated to class relationships and focuses on method behavior.
Which device is used to connect different networks and route data between them?
Internet banking is an example of
Transfer of data from one application to another line is known as :
Which device connects LAN to Internet :
 Which layer of the OSI model is used for establishing, maintaining, and terminating sessions between two devices?
Which network device operates at the Data Link Layer (Layer 2) of the OSI model and connects devices based on MAC addresses?
How to verify that while sending confidential information over the Internet such as usernames, passwords, or credit card numbers, sent data is encrypted
Which of the following protocols is used to retrieve emails from a server?
What does 'BIOS' stand for in computing?
The highest or topmost protocol layer where a communication originates in the form of a message is known as.........................