 |
1 | |
Which of the following is true? |
| | A) | A state is never transitory, it always lasts for an interval of time. |
| | B) | A state is a condition during the life of an object or an interaction during which it satisfies some condition. |
| | C) | An object always has more than one potential state. |
|
|
2 | |
The transition from one state to another is triggered by an event. One type of trigger is a change trigger. Which of the following statements is true? |
| | A) | A change trigger occurs when a condition becomes true. |
| | B) | A change trigger occurs when a condition changes. |
| | C) | A change trigger occurs when an attribute value changes in an object. |
|
|
3 | |
Which of the following statements is true about state machines in general? |
| | A) | A state machine must have a final pseudostate. |
| | B) | A state machine must have at least one initial pseudostate. |
| | C) | A state machine may have at most one initial and one final pseudostate. |
|
|
4 | |
A guard condition may be associated with a transition. Which of the following statements best applies to guard conditions? |
| | A) | A guard condition may only involve attributes of the object that owns the state machine. |
| | B) | A guard condition may involve attributes and links of the object that owns the state machine. |
| | C) | A guard condition may only involve parameters from the triggering event. |
|
|
5 | |
On the following figure which symbol represents the final pseudostate in the state machine?
 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::Mcq_ch11_q5::/sites/dl/free/0077110005/315098/mcq11_05.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif">Mcq_ch11_q5 (2.0K)</a>]]>Mcq_ch11_q5
|
| | A) | Symbol 1 |
| | B) | Symbol 2 |
| | C) | Symbol 3 |
|
|
6 | |
On the following figure which of the transitions has a relative time trigger?
 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::Mcq_ch11_q6::/sites/dl/free/0077110005/315098/mcq11_06.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif">Mcq_ch11_q6 (2.0K)</a>]]>Mcq_ch11_q6
|
| | A) | Transition 1 |
| | B) | Transition 2 |
| | C) | Transition 3 |
|
|
7 | |
Which of the following statements is true about the triggers in a state machine? |
| | A) | The trigger may correspond to any operation within the component that contains the class that owns the state machine. |
| | B) | The trigger must correspond to an operation in the class that owns the state machine. |
| | C) | The trigger must only correspond to operation without parameters in the class that owns the state machine. |
|
|
8 | |
Which of the following statements is true about ‘run-to-completion’ semantics for actions in activity expressions on transitions in state machines? |
| | A) | An action may be interrupted in its execution but it must be restarted so that it can ‘run-to-completion’. |
| | B) | When an action is interrupted then it should not ‘run-to-completion’. |
| | C) | An action may not be interrupted once it has started executing. |
|
|
9 | |
When an internal transition occurs within a state which of the following is true? |
| | A) | The entry and exit actions, if present, are triggered. |
| | B) | The entry and exit actions are not triggered. |
| | C) | The entry and exit actions if present and the action tied to the internal transition are all triggered. |
|
|
10 | |
A state machine may have states that include substates. Which of the following is true? |
| | A) | An object may occupy multiple concurrent substates simultaneously. |
| | B) | An object may occupy only two concurrent substates simultaneously. |
| | C) | An object may only occupy one substate at a time. |
|
|
11 | |
A state in a state machine may have concurrent nested submachines. Which of the following is true? |
| | A) | Each of the concurrent nested submachines within a state must have the same number of states. |
| | B) | When the state changes in one concurrent nested submachine it must change in the other submachines in the same composite state. |
| | C) | State transitions in concurrent nested submachines in the same composite state are independent of each other unless the enclosing state is exited (or entered). |
|
|
12 | |
A state in a state machine may have concurrent nested submachines. Which of the following is true? |
| | A) | The enclosing state may only exit when at least one of its submachines has reached its final state. |
| | B) | The enclosing state may exit if triggered irrespective of the states of the submachines. |
| | C) | The enclosing state may only exit when all of its submachines have reached their final state. |
|
|
13 | |
When an object exits a composite state which of the following is true. |
| | A) | Each of the submachines in the composite state must enter their final state. |
| | B) | At least one of the submachines in the composite state must enter its final state. |
| | C) | Whatever combination of substates the composite is in, all those substates are exited. |
|
|
14 | |
A state machine may include junction and choice pseudostates. Which of the following statements is true? |
| | A) | A static conditional branch has the same semantics as choice pseudostate. |
| | B) | Guard conditions on compound transition using junction pseudostates are evaluated at the junction pseudostate. |
| | C) | Guard conditions on compound transition using choice pseudostates are evaluated at the choice pseudostate. |
|
|
15 | |
The difference between deep and shallow history pseudostates is best described by which of the following statements? |
| | A) | A state machine may have more than one shallow history pseudostate. |
| | B) | A shallow history pseudostate only remembers the active substates for the first level decomposition for a nested submachine. |
| | C) | Deep history pseudostates are only used when there are concurrent nested submachines. |
|
|
16 | |
The behavioural approach to constructing state machines involves which of the following? |
| | A) | All interaction sequence diagrams should be analysed first. |
| | B) | All interaction sequence diagrams involving classes that have heavy messaging should be analysed. |
| | C) | One interaction sequence diagram for each class must be analysed. |
|
|
17 | |
When using the behavioural approach to develop a state machine interaction sequence diagrams are used. Which of the following statements is true? |
| | A) | All message receive events on a sequence diagram correspond to triggers on a state machine. |
| | B) | All message send events on a sequence diagram correspond to actions in activity-expressions. |
| | C) | State changes in a state machine should correspond to message receive events in sequence diagrams that contain the class that owns the state machine. |
|
|
18 | |
When a state machine is checked for consistency with other models of the system which of the following is true? |
| | A) | Every operation in a class must appear as a trigger on a state machine. |
| | B) | Every action should correspond to the execution of an operation on the appropriate class. |
| | C) | Every event must appear on a sequence diagram. |
|
|
19 | |
There are two main kinds of state machine – protocol state machines and behavioural state machines. Which of the following best describes the differences between them? |
| | A) | Protocol state machines cannot have composite states. |
| | B) | Protocol state machines may not have initial and final pseudostates. |
| | C) | Protocol state machines may not have deep or shallow history pseudostates and do not have activity expressions. |
|
|
20 | |
Which of the following statements is true about states in a state machine? |
| | A) | The state machine for some objects may have no states. |
| | B) | The state machine for every object must have at least one state and an initial state. |
| | C) | The state machine for every object must have at least one state, an initial state and a final state. |
|