Hinduja Tech Lead Engineer Interview Questions, Process, and Tips

Baud rate is the number of signal changes per second in a communication channel.

• Baud rate is measured in bits per second (bps).

• It determines the speed at which data is transmitted over a communication channel.

• Higher baud rates mean faster data transfer.

• Baud rate is often confused with bit rate, but they are not the same thing.

Transport protocol in CAN J1939 is used for transmitting large data packets over the network.

• Transport protocol breaks down large data packets into smaller segments for transmission.

• It uses a flow control mechanism to ensure all segments are received and reassembled in the correct order.

• Examples of transport protocols in J1939 include BAM (Broadcast Announce Message) and RTS/CTS (Request To Send/Clear To Send).

CAN bus off is a state where communication between nodes on a CAN bus is lost. It can be recovered by resetting the bus or fixing the underlying issue.

• CAN bus off occurs when a node on the bus detects an error and goes into a fault state.

• This can happen due to issues like a short circuit, open circuit, or excessive noise on the bus.

• To recover from CAN bus off, the bus needs to be reset or the underlying issue needs to ...read more

Security Access Service in UDS is responsible for managing access control and authentication for various UDS services.

• Security Access Service provides secure authentication and authorization for UDS services.

• It manages access control policies and enforces them across UDS services.

• It supports various authentication mechanisms such as username/password, certificates, and tokens.

• Examples of UDS services that use Security ...read more

Read DTCs service in UDS is used to retrieve diagnostic trouble codes from a vehicle's electronic control unit.

• DTCs are codes that indicate a problem with a vehicle's systems or components

• The read DTCs service allows technicians to identify and diagnose issues with a vehicle

• The service is part of the Unified Diagnostic Services (UDS) protocol used in automotive diagnostics

• Examples of DTCs include P0300 (random/multiple...read more