AUTOSAR & Automotive Software test (Intermediate)

Sample questions

5 sample questions from the AUTOSAR & Automotive Software test, with the answers. Samples are taken out of the live test, so you will not meet these when you sit it.

1. Which of the following correctly describes how signals are grouped into PDUs in the AUTOSAR Classic Platform?

   1. The COM module groups signals into PDUs according to the configuration in the ARXML file.
   2. The PduR module is responsible for grouping signals into PDUs based on the CAN driver's requirements.
   3. The CanIf module groups signals into PDUs based on the CAN frame size limitations.
   4. The MCAL layer groups signals into PDUs directly based on hardware capabilities.

   Answer: A. The COM module groups signals into PDUs according to the configuration in the ARXML file.

   In the AUTOSAR Classic Platform, the COM module is responsible for grouping signals into PDUs (Protocol Data Units) as defined in the ARXML configuration file. This ensures that signals are transmitted over the CAN bus in the correct format. Other options suggest incorrect roles for other modules or incorrect configuration sources.

2. Which of the following statements accurately describes how DTC mapping is handled in the AUTOSAR architecture?

   1. DTC mapping is performed by the COM module, which is responsible for managing DTCs and their communication over the CAN bus.
   2. DTC mapping is managed by the OS module, which coordinates the execution of DTC-related tasks and ensures their proper timing.
   3. DTC mapping is handled entirely by the DCM module, which both manages DTCs and communicates with external diagnostic tools using the UDS protocol.
   4. DTC mapping in AUTOSAR is performed by the DEM module, which is responsible for managing DTCs and their status, while the DCM module handles the UDS protocol and communication with external diagnostic tools.

   Answer: D. DTC mapping in AUTOSAR is performed by the DEM module, which is responsible for managing DTCs and their status, while the DCM module handles the UDS protocol and communication with external diagnostic tools.

   In AUTOSAR, the Diagnostic Event Manager (DEM) is responsible for managing Diagnostic Trouble Codes (DTCs), including their status and behavior. It works in conjunction with the Diagnostic Communication Manager (DCM), which handles the UDS protocol and communicates with external diagnostic tools. This separation ensures that DTCs are managed independently of the communication protocol, allowing for a more modular and scalable design.

3. Which component in the AUTOSAR Classic Platform is responsible for managing Diagnostic Trouble Codes (DTCs) and their associated status bits?

   1. MCAL (Microcontroller Abstraction Layer)
   2. DCM (Diagnostic Communication Manager)
   3. RTE (Runtime Environment)
   4. DEM (Diagnostic Event Manager)

   Answer: D. DEM (Diagnostic Event Manager)

   DTCs (Diagnostic Trouble Codes) with status bits are managed by the Diagnostic Event Manager (DEM) in AUTOSAR. The DCM (Diagnostic Communication Manager) handles the UDS protocol but does not manage the DTCs themselves. The other options are not directly involved in DTC mapping within the AUTOSAR framework.

4. Which statement best describes the purpose of ASIL decomposition in ISO 26262?

   1. ASIL decomposition is used to split a high-ASIL requirement into lower-ASIL components that are independently implemented and verified.
   2. ASIL decomposition is used to increase the ASIL level of a component by combining multiple low-ASIL requirements.
   3. ASIL decomposition is used to replace a high-ASIL requirement with a lower-ASIL requirement for cost savings.
   4. ASIL decomposition is used to reduce the safety requirements of a system by eliminating the need for functional safety analysis.

   Answer: A. ASIL decomposition is used to split a high-ASIL requirement into lower-ASIL components that are independently implemented and verified.

   ASIL decomposition is a technique in ISO 26262 where a high-ASIL safety requirement (e.g., ASIL D) is split into lower-ASIL requirements (e.g., ASIL C and ASIL A) that are implemented in separate hardware or software components. This approach allows for the use of less stringent safety mechanisms in the lower-ASIL components, provided they are functionally independent from the higher-ASIL components. This is done to reduce the overall safety requirements and make the system more cost-effective and manageable. Other options are incorrect because they do not accurately reflect the purpose and application of ASIL decomposition as defined by ISO 26262.

5. Which AUTOSAR module is responsible for storing and managing Diagnostic Trouble Code (DTC) status bits?

   1. DTC status bits are stored and managed by the COM module.
   2. DTC status bits are stored and managed by the OS module.
   3. DTC status bits are stored and managed by the DEM module.
   4. DTC status bits are stored and managed by the DCM module.

   Answer: C. DTC status bits are stored and managed by the DEM module.

   In AUTOSAR, the Diagnostic Event Manager (DEM) is responsible for managing Diagnostic Trouble Code (DTC) status bits, including storing them and updating their status based on diagnostic tests. The DCM (Diagnostic Communication Manager) handles the UDS protocol, but the actual DTC status is maintained by DEM. Other options incorrectly attribute this responsibility to other modules or misrepresent the role of DCM.