Vector [Introduction to FlexRay]

This learning objectives test contains questions on each learning unit of the chapter “FlexRay Communication”. At the end of the learning objectives test you can have your answers checked. It is not necessary to answer all of the test questions. You can click the key icon to have the correct answer displayed. The next time you call up the learning objectives test you can have your answers checked again.

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Question 1

FlexRay communication is not restricted to any specific physical topology. However, which of the following physical topologies is not possible due to the communication principle?

Point-to-point Connection

Passive Star Topology

Active Star Topology

Ring Topology

Question 2

To minimize the risk of failure, FlexRay provides for a layout of the communication channel.

Question 3

What is the maximum data rate at which the communication channel can be operated in a FlexRay cluster?

1 Mbit/s

5 Mbit/s

10 Mbit/s

20 Mbit/s

Question 4

The FlexRay cluster is based on a communication architecture, whose core property is static, time-defined initiation of actions in the distributed system.

Question 5

Which bus access method represents the foundation for data communication in a FlexRay cluster?

Token Ring Method

CSMA Method

TDMA Method

CSMA/CA Method

Question 6

Star truncation is the amount of time an active star coupler needs to reach its operating state. Therefore, the transmission of each FlexRay message must begin with a defined bit sequence. What is this bit sequence called?

Frame Start Sequence (FSS)

Transmission Start Sequence (TSS)

Byte Start Sequence (BSS)

Frame End Sequence (FES)

Question 7

Physical signal transmission in the FlexRay cluster is based on the transmission of voltage differences. Is this a true statement?

Question 8

The FlexRay nodes use a special algorithm to correct their local clocks in such a way that all local clocks in the FlexRay cluster run synchronous to a global clock except for a defined deviation. Which methods are used here?

Phase Correction

Vertical Correction

Horizontal Correction

Frequency Correction

Question 9

Every FlexRay message is made up of three parts: header, payload and trailer. Which information is transported in the trailer?

User Data (Payload)

Sync Frame Indicator

Check Bits

Startup Frame Indicator

Question 10

The header of a FlexRay message comprises bits.