Which UML diagram is used to model the static structure of a system from a deployment perspective, showing nodes and their relationships?

Question $15$Answer

a$.$

Class diagram

b$.$

Object diagram

c$.$

Deployment diagram

d$.$

Package diagram

Question $16$

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What does a transition in a state diagram represent?

Question $16$Answer

a$.$

A method call between objects

b$.$

A relationship between classes

c$.$

A message exchange between actors

d$.$

A change in the internal state of an object

Question $17$

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In a state diagram, what does a filled circle with an arrow pointing to a state represent?

Question $17$Answer

a$.$

A final state

b$.$

An initial state

c$.$

A transition

d$.$

A decision point

Question $18$

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Which of the following statements about classes and objects is correct?

Question $18$Answer

a$.$

Classes are instances of objects.

b$.$

Classes are defined by objects.

c$.$

Objects are defined by classes.

d$.$

Objects are instances of classes.

Question $19$

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What is the primary advantage of encapsulation in OOP?

Question $19$Answer

a$.$

It ensures that objects can only be accessed through predefined methods

b$.$

It simplifies the design of complex systems

c$.$

It improves the performance of the software

d$.$

It allows for code reusability

Question $20$

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What is the primary purpose of a use case diagram in UML?

Question $20$Answer

a$.$

To model the behavior of a single class

b$.$

To illustrate the interactions between objects

c$.$

To describe the functional requirements of a system

d$.$

To depict the dynamic aspects of a system's functionality

Question $21$

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Which UML diagram is used to represent how objects collaborate to achieve a specific goal or functionality in a system?

Question $21$Answer

a$.$

Collaboration diagram

b$.$

State diagram

c$.$

Use case diagram

d$.$

Sequence diagram

Question $22$

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In a class diagram, what does an association line with an arrow indicate?

Question $22$Answer

a$.$

Generalization

b$.$

Aggregation

c$.$

Composition

d$.$

Dependency

Question $23$

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What is 'abstraction' in the context of OOP?

Question $23$Answer

a$.$

The process of creating multiple instances of a class

b$.$

The process of hiding the internal details of an object's behavior

c$.$

The ability to inherit properties and methods from another class

d$.$

The process of allowing objects to take on many forms

Question $24$

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In a sequence diagram, what do vertical lines represent?

Question $24$Answer

a$.$

Objects

b$.$

Constraints

c$.$

States of an object

d$.$

Messages between objects

Question $25$

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Which OOAD diagram is used to model the dynamic behavior of a system over time?

Question $25$Answer

a$.$

Class diagram

b$.$

Use case diagram

c$.$

State diagram

d$.$

Sequence diagram

Question $26$

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In a sequence diagram, what do lifelines represent?

Question $26$Answer

a$.$

The sequence of method calls within a class

b$.$

Objects

c$.$

Messages exchanged between objects

d$.$

States of an object during its lifetime

Question $27$

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Which OOAD diagram is used to show the interactions between objects and their messages?

Question $27$Answer

a$.$

State diagram

b$.$

Class diagram

c$.$

Use case diagram

d$.$

Sequence diagram

Question $28$

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In a class diagram, what does a dashed line with a hollow diamond at one end indicate?

Question $28$Answer

a$.$

Generalization

b$.$

Dependency

c$.$

Aggregation

d$.$

Composition

Question $29$

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What is the purpose of a communication diagram in UML?

Question $29$Answer

a$.$

To model the behavior of a single class

b$.$

To illustrate the interactions between objects

c$.$

To show the flow of activities within a system

d$.$

To depict the dynamic aspects of a system's functionality

Question $30$

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What is 'inheritance' in object$-$oriented programming $($OOP$)?$

Question $30$Answer

a$.$

The process of creating multiple instances of an object

b$.$

The ability of a subclass to inherit attributes and methods from its superclass

c$.$

The process of creating new instances of classes

d$.$

The process of hiding the complexity of a class

Question $31$

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Which OOAD diagram is used to show the static structure of a system, including classes, attributes, and relationships?

Question $31$Answer

a$.$

Class diagram

b$.$

Use case diagram

c$.$

Sequence diagram

d$.$

Activity diagram

Question $32$

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Which UML diagram is used to show the structure of a system, including classes, attributes, methods, and relationships?

Question $32$Answer

a$.$

Use case diagram

b$.$

Class diagram

c$.$

Sequence diagram

d$.$

State diagram

Question $33$

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In OOAD, what does the term 'aggregation' represent?

Question $33$Answer

a$.$

A form of inheritance where a subclass extends a superclass

b$.$

A specialized form of association where one class is part of another class

c$.$

A relationship between classes where objects can belong to multiple classes

d$.$

A relationship between classes where one class is dependent on another class

Question $34$

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In an activity diagram, what does a diamond shape represent?

Question $34$Answer

a$.$

A decision point

b$.$

An activity

c$.$

An object node

d$.$

A synchronization bar

Question $35$

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Which UML diagram is used to show the timing constraints of messages in a system?

Question $35$Answer

a$.$

Communication diagram

b$.$

State diagram

c$.$

Timing diagram

d$.$

Sequence diagram

Question $36$

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In a use case diagram, what does an actor represent?

Question $36$Answer

a$.$

A state of an object

b$.$

A specific instance of a class

c$.$

An external entity that interacts with the system

d$.$

A sequence of actions within a system

Question $37$

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Which UML diagram is used to depict the dynamic behavior of a system, focusing on the states of objects and transitions between states?

Question $37$Answer

a$.$

State diagram

b$.$

Sequence diagram

c$.$

Activity diagram

d$.$

Class diagram