OMG OMG-OCRES-A300 問題集

質問 1：
Which statement is true about the Real Time CORBA Mutex Interface?
A. If the mutex is locked, subsequent lock() calls will return with no action.
B. The mutex returned by create_mutex must have the same priority inheritance properties as those used
by the ORB to protect resources.
C. The create_mutex operation creates the object in the locked state.
D. If the try_lock() operation does get the lock within the max_wait time period, it returns TRUE at which
time the user must call the lock() operation.
正解：B

質問 2：
Which statement is true about the thread reentrant policy of the Extensible Transport Framework
Connection interface?
A. Multiple ORB threads may call write() simultaneously on the same Connection object at the same time.
B. Multiple ORB threads may call read() simultaneously on the same Connection object.
C. All operations on a Connection object instance can only be invoked from within a single ORB thread.
D. ORBs may only call read() from one single thread at a time on the same Connection object.
正解：D

質問 3：
Which statement is true about Priority Bands?
A. Priority Bands must collectively cover the entire CORBA priority range available.
B. The complete set of priorities covered by the bands has to form a contiguous range.
C. A Priority Band may represent a single priority value.
D. Priority Bands can overlap.
正解：C

質問 4：
In the CORBA Component Model, how are component types specified?
A. as a collection of interfaces
B. using the Interface Definition Language
C. using an XML document conforming to the Component schema
D. as a set of ports
正解：B

質問 5：
The IDL module that contains all definitions related to RT-CORBA / Dynamic Scheduling is named
_ _____.
A. RTDynamicScheduling
B. RTCorba
C. RTCORBA
D. RTDynScheduling
E. RTScheduling
正解：E

質問 6：
Which statement is true about a READ_ONLY DLRL Cache?
A. It can be associated with more than one DCPS Subscriber entities.
B. It can be associated with more than one DCPS Publisher entities.
C. It is associated with a single DCPS Publisher entity.
D. It is associated with a single DCPS Subscriber entity.
正解：D

質問 7：
From the Domain Viewpoint as defined in the UML Profile for SPT, which statement is true about RT
CORBAs extensions to standard CORBA?
A. They provide for gaining knowledge of absolute priorities of activities in distributed environments.
B. They provide a framework for predictable end-to-end execution times in distributed and heterogeneous
environments.
C. They provide a mechanism to support but NOT guarantee that deadlines are met in distributed and
embedded environments.
D. They provide for a data centric (i.e. ordered packet) capability in CORBA in homogeneous
environments.
正解：B

質問 8：
Which statement is true about the LogLevel field?
A. Type LogLevel is an integer type that is utilized to sort logging records.
B. The value provided in LogLevel is recorded in the logging record and provided to the consumer at
retrieval.
C. LogLevel values of 15 to 31 are reserved for debugging support.
D. A LogLevel value of SECURITY_ALARM or FAILURE_ALARM results in an immediate exception
event when the logging record is stored.
正解：B