CET Embedded Systems & Programming 3

Question 1

Which serial communication protocol uses separate MOSI, MISO, SCLK, and chip-select lines?

Accepted Answer

SPI

Answer

I2C

Answer

UART

Answer

CAN

Question 2

In I2C communication, what is the function of pull-up resistors on the SDA and SCL lines?

Accepted Answer

They pull the open-drain lines high when no device is driving them low

Answer

They provide termination to prevent signal reflections

Answer

They limit current into the slave device

Answer

They filter high-frequency noise from the bus

Question 3

What does 'baud rate' specify in a UART configuration?

Accepted Answer

The number of symbol transitions per second on the line

Answer

The number of data bits per frame

Answer

The voltage swing of the signal

Answer

The parity check interval

Question 4

In SPI, which device generates the clock signal (SCLK)?

Accepted Answer

The master device exclusively

Answer

Any device that has data to send

Answer

The slave device currently being addressed

Answer

The device that last sent a start condition

Question 5

What is the maximum number of devices addressable on a standard I2C bus using 7-bit addressing?

Accepted Answer

112

Answer

64

Answer

128

Answer

256

Question 6

CAN bus is most commonly used in which application domain?

Accepted Answer

Automotive and industrial control networks

Answer

Consumer audio equipment

Answer

High-speed PC peripherals

Answer

Wireless sensor networks

Question 7

In UART framing, what is the purpose of the stop bit?

Accepted Answer

To signal the end of a data frame and allow receiver re-synchronization

Answer

To signal that a parity error has occurred

Answer

To mark the beginning of a new data byte

Answer

To indicate that the transmitter is ready for the next byte