Question 1

Which diagram models system structure?&#10;A)State machine diagram.&#10;B)Class diagram.&#10;C)Activity diagram.&#10;D)Sequence diagram.

Accepted Answer

A class diagram models the object-oriented structure of a system, including its classes, their attributes, and their relationships to each other. It is commonly used during the design phase of software development to visualize and communicate the system's architecture. State machine diagrams model the behavior of a single object or system component, activity diagrams model the flow of actions within a process or use case, and sequence diagrams model the interactions between objects or components over time. While each of these diagrams may be useful in certain contexts, only the class diagram specifically models system structure.

Question 2

Which diagram is also called a collaboration diagram.&#10;A)State machine diagram.&#10;B)Communication diagram.&#10;C)Activity diagram.&#10;D)Sequence diagram.

Accepted Answer

A communication diagram is also called a collaboration diagram. It shows interactions between objects or parts in terms of sequenced messages.

Question 3

A collaboration between objects consists of .&#10;A)an object of one class sending a message to an object of another class.&#10;B)an object of one class repeating messages sent to it from an object of another class.&#10;C)two objects in the same application,but not necessarily sending messages to each other.&#10;D)None of the above.

Accepted Answer

Collaboration between objects involves communication between objects of different classes by sending messages to each other. Option A correctly describes this concept. Option B describes a situation where an object is just repeating messages received from another object. Option C is too vague and could describe any two objects in the application, even if they have no interaction. Option D is incorrect as option A correctly describes object collaboration.

Question 4

What is a message between collaborating objects called in the UML?&#10;A)asynchronous call.&#10;B)communication call.&#10;C)synchronous call.&#10;D)collaboration call.

Accepted Answer

A message between collaborating objects is called a synchronous call in the UML. Synchronous calls are where one object sends a request to another object, and the sender object waits for a response before continuing its own execution.

Question 5

The sequence of messages in a communication diagram progresses:&#10;A)alphabetically.&#10;B)in numerical order from least to greatest.&#10;C)Both of the above.&#10;D)None of the above.

Accepted Answer

In a communication diagram, messages are numbered to show the sequence in which they occur, progressing in numerical order from least to greatest.

Question 6

The use case diagram models ________.&#10;A)the interactions between a system's client and one of the system's capabilities.&#10;B)each software life cycle stage in succession.&#10;C)each software life cycle by repeating one or more stages several times via use cases.&#10;D)the interactions between implementations and testing.

Accepted Answer

A use case diagram models the interactions between a system's client (i.e., actors) and one of the system's capabilities (i.e., use cases). It shows how actors interact with the use case and what the use case does in response. It is a high-level view of the system's functionality and does not show software lifecycle stages or testing.

Question 7

In the UML,a class's attributes are placed in the ________ compartment of the class's rectangle.&#10;A)first.&#10;B)second.&#10;C)third.&#10;D)bottom.

Accepted Answer

In UML, a class's attributes are placed in the second compartment of the class's rectangle, following the first compartment which contains the class name.

Question 8

Communication diagrams contain an object's lifeline.Which of the following is true of the object's lifeline?&#10;A)Actions occur along an object's lifeline in chronological order from top to bottom.&#10;B)The line is dotted.&#10;C)The lifeline represents the progression of time.&#10;D)All of the above are true.

Accepted Answer

In communication diagrams, an object's lifeline is represented as a dotted line, actions occur chronologically from top to bottom, and it represents the progression of time.

Question 9

Which of the following is the first stage of the software life cycle?&#10;A)design.&#10;B)implementation.&#10;C)requirements gathering.&#10;D)testing.

Accepted Answer

The first stage of the software life cycle is typically requirements gathering, where the specifications and desired outcomes for the software are identified and documented. This stage helps ensure that the software development process is focused on meeting the needs of the intended users or customers.

Question 10

An activity diagram models ________.&#10;A)the states of an object.&#10;B)the attributes of an object.&#10;C)the behaviors of an object.&#10;D)the transactions of an object.

Accepted Answer

An activity diagram models the behaviors of an object or system. It shows the flow of activities or processes, including actions, decisions, and branching paths, that takes place within the system. It is used to model complex processes or workflows and helps to visualize and understand the behavior of a system. Option A, states of an object is modeled using state machine diagrams. Option B, attributes of an object is modeled using class diagrams. Option D, transactions of an object is modeled using sequence diagrams.

Question 11

Objects are modeled in the UML as containing names in the form .&#10;A)ovals,: ClassName.&#10;B)ovals,objectName : ClassName.&#10;C)rectangles,: ClassName.&#10;D)rectangles,objectName : ClassName.

Accepted Answer

The answer of Objects are modeled in the UML as...

Question 12

A final state in an activity diagram is represented with a(n)________.&#10;A)solid circle.&#10;B)empty circle.&#10;C)solid circle enclosed in an open circle.&#10;D)solid rectangle enclosed in an open rectangle.

Accepted Answer

The answer of A final state in an activity diagram...

Question 13

UML ________ model several states of an object and show under what circumstances the object changes state.&#10;A)diagrams.&#10;B)activity diagrams.&#10;C)state machine diagrams.&#10;D)machine diagrams.

Accepted Answer

The answer of UML ________ model several states of an...

Question 14

An activation indicates that:&#10;A)an object is sending a message.&#10;B)an object is being created.&#10;C)an object is executing.&#10;D)an object has completed executing.

Accepted Answer

The answer of An activation indicates that:&#10;A)an object is sending...

Question 15

In the UML,the diagram emphasizes which objects participate in collaborations.&#10;A)participation.&#10;B)communication.&#10;C)collaboration.&#10;D)sequence.

Accepted Answer

The answer of In the UML,the diagram emphasizes which objects...

Question 16

The UML represents operations by listing the operation name,followed by a ________-separated list of parameters in parentheses,a ________ and the return type.&#10;A)colon,semicolon.&#10;B)colon,colon.&#10;C)comma,colon.&#10;D)comma,semicolon.

Accepted Answer

The answer of The UML represents operations by listing the...

Question 17

Which of the following is not an attribute?&#10;A)The height of a person.&#10;B)The volume of a radio.&#10;C)The speed of a car.&#10;D)The user of an ATM system.

Accepted Answer

The answer of Which of the following is not an...

Question 18

Which of the following is not an actor of the ATM system?&#10;A)A user who views an account balance.&#10;B)A user who provides requirements for building the ATM system.&#10;C)A user who withdraws cash from the ATM.&#10;D)A user who deposits funds into the ATM.

Accepted Answer

The answer of Which of the following is not an...

Deck 12: Atm Case Study,part 1: Object-Oriented Design With the Uml