Question 1

Which of the following is a mechanism that allows several objects in an class hierarchy to have different methods with the same name&#10;A)aggregation&#10;B)polymorphism&#10;C)inheritance&#10;D)all of the mentioned

Accepted Answer

Polymorphism is the mechanism in object-oriented programming that allows objects of different classes to be treated as objects of a common super class, and thus, methods of the same name in different classes can perform different tasks. This enables one interface to be used for a general class of actions.

Question 2

How is generalization implemented in Object Oriented programming languages&#10;A)inheritance&#10;B)polymorphism&#10;C)encapsulation&#10;D)abstract classes

Accepted Answer

inheritance&#10;

Question 3

Which of the following describes&#34;Is-a-Relationship&#34;&#10;A)aggregation&#10;B)inheritance&#10;C)dependency&#10;D)all of the mentioned

Accepted Answer

"Is-a-Relationship" is best described by inheritance, where a subclass inherits properties and behavior from a superclass, indicating that the subclass is a specialized form of the superclass.

Question 4

Object that collects data on request rather than autonomously is known as&#10;A)active object&#10;B)passive object&#10;C)multiple instance&#10;D)none of the mentioned

Accepted Answer

A passive object collects data on request rather than autonomously, meaning it does not act on its own but rather waits for an external action to trigger its data collection or response. Active objects, in contrast, can initiate actions autonomously.

Question 5

Objects are executed&#10;A)sequentially&#10;B)in parallel&#10;C)sequentially & parallel&#10;D)none of the mentioned

Accepted Answer

Objects themselves are not "executed." The methods or functions within objects can be executed either sequentially or in parallel, depending on the programming model and the environment in which they are running. Therefore, both sequential and parallel execution can apply to operations within or on objects.

Question 6

What among these is true&#10;A)associations may also correspond to relation between instances of three or more classes&#10;B)association lines may be unlabeled or they may show association name&#10;C)all of the mentioned&#10;D)none of the mentioned

Accepted Answer

Both statements A and B are true regarding associations in the context of UML (Unified Modeling Language) or object-oriented modeling. Associations can indeed involve three or more classes and can be represented with or without labels.

Question 7

Which of these are the heuristics&#10;A)name classes, attributes, and roles with noun phrases&#10;B)name operations and associations with verb phrases&#10;C)stick to binary associations&#10;D)all of the mentioned

Accepted Answer

All of the mentioned options are heuristics for designing and naming elements in object-oriented models, helping to maintain clarity and consistency.

Question 8

An object symbol is divided into what parts&#10;A)top compartment&#10;B)bottom compartment&#10;C)all of the mentioned&#10;D)none of the mentioned

Accepted Answer

An object symbol is divided into two main parts: the top compartment, which typically contains the object's name and possibly its type, and the bottom compartment, which can contain the object's attributes or operations. Therefore, "all of the mentioned" is the correct answer as both the top and bottom compartments are parts of an object symbol.

Question 9

In Unified Modeling Language, diagrams which captures system static structure and provide foundation for other models is called&#10;A)deployment diagrams&#10;B)class diagrams&#10;C)component diagrams&#10;D)object diagrams

Accepted Answer

Class diagrams capture the static structure of a system, showing the system's classes, their attributes, operations, and the relationships among objects. They are foundational for other types of diagrams in UML, serving as a blueprint for the system's structure.

Deck 4: Object-Oriented Programming: Concepts, Relationships, and Design