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1 | |
Which of the following is true? |
| | A) | Identifying what messages are passed between objects is a straightforward process. |
| | B) | Message passing is a metaphor used to describe object interaction. |
| | C) | Message passing is only concerned with query operations. |
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2 | |
Which of the following is true about boundary objects? |
| | A) | The identification and specification of boundary objects is purely a design activity. |
| | B) | The identification and detailed specification of boundary objects is part of requirements specification. |
| | C) | The identification and specification of boundary objects is considered in both analysis and design but in different ways. |
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3 | |
What is meant by the term collaboration in context of interaction modelling? |
| | A) | A collaboration describes the messages between objects. |
| | B) | A collaboration describes objects that share functionality. |
| | C) | A collaboration describes the structure and links between a group of instances playing roles in a behaviour. |
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4 | |
What is meant by the term interaction? |
| | A) | An interaction describes any communication between two lifelines. |
| | B) | An interaction describes a group of lifelines that share functionality. |
| | C) | An interaction defines the message passing between lifelines (e.g. objects) within the context of a collaboration to achieve a particular behaviour. |
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5 | |
An interaction sequence diagram drawn during analysis differs from one drawn during design in which of the following ways? |
| | A) | The former normally does not include design objects or detailed specifications of message signatures. |
| | B) | The former normally does not include boundary objects. |
| | C) | The former normally does not include control objects. |
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6 | |
On the following figure which of the symbols labelled 1, 2 or 3 represents an activation on a sequence diagram?
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| | A) | Symbol 1 |
| | B) | Symbol 2 |
| | C) | Symbol 3 |
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7 | |
Which of the arrows labelled 1, 2 or 3 is pointing to an interaction constraint?
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| | A) | Arrow 1 |
| | B) | Arrow 2 |
| | C) | Arrow 3 |
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8 | |
Which of the labelled symbols in the following diagram represents a synchronous message?
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| | A) | Symbol 1 |
| | B) | Symbol 2 |
| | C) | Symbol 3 |
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9 | |
What is meant by the term ‘thread of control’ in the context of concurrent behaviour? |
| | A) | A thread of control is a weak part of the control system. |
| | B) | A thread of control is the mechanism that controls concurrent behaviour. |
| | C) | A thread of control is an execution pathway that may occur simultaneously with other execution pathways. |
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10 | |
Which of the following statements about sequence diagrams is true? |
| | A) | A sequence diagram containing an interaction fragment may be referenced by only one sequence diagram. |
| | B) | A sequence diagram containing an interaction fragment may be referenced by one or more sequence diagrams. |
| | C) | A sequence diagram containing an interaction fragment may never be referenced by another sequence diagram. |
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11 | |
Which of the following is an appropriate way of hiding complex behaviour in an interaction sequence diagram? |
| | A) | A group of objects and their interactions can be represented by a single lifeline which references an interaction fragment. |
| | B) | Some messages are omitted to reduce the complexity. |
| | C) | Some objects are omitted from the diagram to reduce the complexity. |
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12 | |
Which of the following is an appropriate way of modelling a part of an interaction that appears in several other interactions? |
| | A) | Model the common part of the interaction as an ‘alt’ combined fragment. |
| | B) | Model the common part of the interaction using a communication diagram. |
| | C) | Model the common part of the interaction as an interaction fragment in a separate sequence diagram. |
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13 | |
Interaction sequence diagrams should be consistent with other diagrams and models that relate to the same group of objects or subsystems. Which of the following statements is true? |
| | A) | A sequence diagram must show all the messages that are consistent with the state machines for each of the lifelines in the sequence diagram and be consistent with the class diagram. |
| | B) | A sequence diagram must be consistent with the class diagram or with the state machines for lifelines in the sequence diagram. |
| | C) | A sequence diagram must be consistent all other diagrams or models that include or relate to the lifelines in the sequence diagram. |
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14 | |
Which of the following accurately describes an asynchronous message? |
| | A) | An asynchronous message does not cause the invoking operation to halt execution while it awaits the return of control. |
| | B) | An asynchronous message has the same effect as a blocking call. |
| | C) | An asynchronous message is a reply to a synchronous message. |
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15 | |
Communication diagrams differ from interaction sequence diagrams in the following way? |
| | A) | Communication diagrams cannot show the design detail that can be shown on a sequence diagram. |
| | B) | Communication diagrams only show the collaboration and not the sequence of the messages. |
| | C) | Communication diagrams show the links between the objects. |
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16 | |
In a communication diagram one message has the sequence number 5.1.1. Which of the following sequence numbers indicates the message that must be the immediate successor? |
| | A) | A message with the sequence number 5.1.2. |
| | B) | A message with the sequence number 5.1.1.1. |
| | C) | A message with the sequence number 5.2.1. |
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17 | |
Which of the following is a disadvantage of communication diagrams? |
| | A) | A communication diagram can only be used during analysis. |
| | B) | A communication diagram cannot include guard conditions. |
| | C) | A communication diagram is difficult to read if there are many messages between two objects. |
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18 | |
An interaction diagram should be consistent with the associated class diagram in various ways. Which of the following statements is true? |
| | A) | It is always correct to show a message between two objects if there is an association between their classes. |
| | B) | The sending object must have the object reference of the receiving object before sending a message to that object. |
| | C) | A message should not be shown between two objects if there is no association between their classes. |
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19 | |
Which of the following statements is correct about interaction overview diagrams? |
| | A) | An interaction overview diagram may not have decision nodes. |
| | B) | An interaction overview diagram may only have interaction occurrences, initial pseudostates and final pseudostates as nodes in the diagram. |
| | C) | An interaction overview diagram may include in-line sequence diagrams. |
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20 | |
Timing diagrams are used to show how timing constraints affect interactions between lifelines. Which of the following statements is true? |
| | A) | A lifeline may only have two alternative states. |
| | B) | When a state change is being modelled that takes significant (from the application’s perspective) time it is shown by a slanting line. |
| | C) | Messages are not shown on timing diagrams. |
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