Bosch Global Software Technologies Embedded Engineer Interview Questions, Process, and Tips

I am fascinated by the challenge of working with low-level hardware and creating efficient, real-time systems.

• Enjoy the challenge of working with low-level hardware

• Excited about creating efficient, real-time systems

• Passionate about developing innovative solutions for embedded systems

CAN protocol stands for Controller Area Network protocol, used for communication between microcontrollers and devices in automotive and industrial applications.

• CAN protocol is a robust and reliable communication protocol used in automotive and industrial applications.

• It allows multiple microcontrollers to communicate with each other without a host computer.

• CAN protocol uses a differential signaling scheme to reduce ele...read more

Binary Coded Decimal (BCD) is a way of representing decimal numbers using a binary code.

• BCD uses four bits to represent each decimal digit.

• Each decimal digit is represented by its binary equivalent.

• For example, the decimal number 25 is represented in BCD as 0010 0101.

Keyboard mapping in a microcontroller involves assigning specific key codes to each key on the keyboard.

• Keyboard mapping is typically done using a lookup table that maps physical key presses to corresponding key codes.

• The microcontroller reads the key code when a key is pressed and sends it to the computer for processing.

• Keyboards may use different mapping standards such as ASCII or HID.

• Custom keyboard mappings can als...read more

An analog to digital converter converts continuous analog signals into discrete digital values.

• Converts continuous analog signals into digital values

• Utilizes sampling and quantization techniques

• Common types include successive approximation ADC and delta-sigma ADC

Types of error messages in CAN protocol

• Bit Error: Error in a single bit of the message

• Stuff Error: Error in the stuffing bits

• CRC Error: Error in the cyclic redundancy check

• Form Error: Error in the message format

• Acknowledge Error: Error in the acknowledgement of the message

Bit arbitration is the process of resolving conflicts when multiple devices try to access the same bus simultaneously.

• Bit arbitration is important in multi-master systems where multiple devices can initiate data transfer.

• It ensures that only one device gains control of the bus at a time.

• Different arbitration schemes include priority-based, round-robin, and collision detection.

• For example, in a CAN bus system, the devic...read more

CAN is a communication protocol used in automotive and industrial applications. Normal CAN has 11-bit identifier while Extended CAN has 29-bit identifier.

• Normal CAN has 11-bit identifier while Extended CAN has 29-bit identifier.

• Extended CAN allows for more unique identifiers, enabling more devices to communicate on the same network.

• Normal CAN has a maximum data rate of 1 Mbps while Extended CAN has a maximum data rate ...read more

120 ohm resistance is used in CAN bus to match the characteristic impedance of the transmission line.

• CAN bus is a differential signaling system that requires a balanced impedance to prevent signal reflections.

• The 120 ohm resistance matches the characteristic impedance of the transmission line, which is typically 120 ohms.

• Without the proper impedance matching, signal reflections can cause data errors and reduce the maxi...read more

Diagnostic protocols are a set of rules and procedures used to identify and troubleshoot problems in a system.

• Diagnostic protocols are used in various fields such as automotive, medical, and computer networking.

• They involve a series of tests and measurements to identify the root cause of a problem.

• Diagnostic protocols can be manual or automated, depending on the complexity of the system.

• Examples of diagnostic protocols...read more