What is the relationship between vehicle and engine?

Vehicle can be base class and engine is the part of the vehicle but it has some diff properties So we can define engine as child class. Engine can be responsible to handle the engine related functionlity. So we can say vehicle is a parent class. And engine is child class.

Which relationship represents a has a relationship between objects?

In database design, object-oriented programming and design (see object oriented program architecture), has-a (has_a or has a) is a composition relationship where one object (often called the constituted object, or part/constituent/member object) “belongs to” (is part or member of) another object (called the composite …

Which of the following is a using relationship between two or more objects?

An association is a “using” relationship between two or more objects in which the objects have their own lifetime and there is no owner.

Is a relationship and has a relationship in C++?

C++ Aggregation (HAS-A Relationship) In C++, aggregation is a process in which one class defines another class as any entity reference. It is another way to reuse the class. It is a form of association that represents HAS-A relationship.

Is a relationship and has a relationship in Java?

Association is the relation between two separate classes which establishes through their Objects. Composition and Aggregation are the two forms of association. In Java, a Has-A relationship is otherwise called composition.

Which relationship represents a has a relationship between objects Mcq?

Explanation: Association relationship between classes is made using the objects of classes like we have a bank object denoting ABC bank and some objects of Employee class XYZ1, XYZ2 and so on.

When to use is a and when to use has a relationship?

In a nutshell: IS A relationship means you inherit and extend the functionality of the base class. HAS A relationship means the class is using another class, so it has it as a member.

Which of the following represents the relationship between object and class?

What is the relationship between classes and objects? An object is a collection of data and behaviors that represent some entity (real or abstract). A class defines the structure and behaviors of all entities of a given type. An object is one particular “instance” of that type of entity.

What is the relationship between customer and order class?

A customer can place one to many orders. The purchase order can be placed by only one customer. For example, the ordered object can be linked with only one customer but can be associated with many orders. The class of order is associated with class of customers.

What are the instance variables of Car class?

The Vehicle class would include instance variables such as registrationNumber and owner and instance methods such as transferOwnership(). These are variables and methods common to all vehicles.