OMG UM0-401 OCRESâ„¢ Exam Questions Instant Access

Question 1

Which statement is true about CORBA/e interoperability?

AIndividual systems cannot mix CORBA/e and non-CORBA/e ORBs.

BCORBA/e systems can successfully interoperate with non-CORBA/e CORBA systems.

CApplications written for a CORBA/e ORB will run without modification on a non-CORBA/e ORB.

DCORBA/e ORBs in a system with non-CORBA/e ORBs will cause the entire system to behave in a real-time manner.

Answer : B

Question 2

What two results occur by changing priorities dynamically? (Choose two.)

AReduces overhead

BIncreases overhead

CMay starve lower priority tasks

DAvoids the need for priority queues

Answer : B, C

Question 3

A strictly conforming POSIX application----------

Auses all POSIX functions and standard options

Buses only IEEE tested conforming operating systems

Cuses only POSIX required API's for its OS functionality

Druns on all operating systems whose vendors claim POSIX conformance

Answer : C

Question 4

Which two statements are true of a monitor for synchronization? (Choose two.)

ANo concurrent access by tasks is allowed to any resource(s) within a monitor.

BOne monitor may encapsulate any number of resources and their synchronization functions.

CIf a requesting task enters a monitor but finds the resource isn'tavailable, the task exits the monitor and is placed at the end of the monitor's external queue.

DIf two tasks are waiting in a monitor's queues for separate resources, when the task that has been accessing a resource finishes doing so, all the queues with waiting tasks are served round-robin.

Answer : A, B

Question 5

In the Lightweight Time Service, what is the resolution of clocks?

AThe clock resolution shall be 100 nanoseconds.

BThe clock resolution shall be 100 nanoseconds or less.

CThe clock resolution shall be at least 100 nanoseconds.

DThe clock resolution is implementation-defined.

EThe clock resolution shall be equal to the CPU clock cycle rate.

Answer : D

Question 6

What time scales does the Lightweight Time Service support? (Choose two.)

AEphemeris time

BGlobal Positioning System Time

CTerrestrial Dynamical Time

DInternational Atomic Time

Answer : B, D

Question 7

An example of a module exhibiting temporal cohesion is a combination of-------

Athe control and management of two onboard hardware clocks

Ba 40 millisecond periodic navigation function and a 40 millisecond periodic display update function

Cseveral mathematical functions such as the sine, cosine, and arctangent functions

Dthe vehicle speed and acceleration management functions

Answer : B

OMG Certified Real-time and Embedded Specialistâ„¢ UM0-401 OCRESâ„¢ Exam Questions