Embedded Systems Quiz

What does PWM stand for in the context of I/O Hardware?

• Programmable Web Manager

• Pulse Width Modulation

• Powerful Wireless Module

• Parallel Wiring Mechanism

What is the duty cycle in PWM?

• The frequency of the PWM signal

• The proportion of time that the voltage is high

• The number of pins used in the circuit

• The type of device controlled by PWM

What is the purpose of General-Purpose Input / Output (GPIO) pins?

• Connect digital hardware to embedded processors

• Control the speed of electric motors

• Send data serially over multiple lines

• Maintain synchrony across multiple wires

Which standard is used for connecting teletypes to modems?

• RS-232

• USB

• I2C

• FireWire

What is the purpose of a JTAG serial interface?

• Connect printers to computers

• Provide a debug interface to embedded processors

• Transmit data asynchronously

• Control the brightness of LED lights

What is the main drawback of parallel interfaces compared to serial interfaces?

• Bulkier cables and more I/O pins

• Faster data transmission speed

• Lower power consumption

• Easier maintenance of synchrony

What is the purpose of a bus in an embedded system?

• An interface shared among multiple devices

• A device to control the speed of motors

• A mechanism to control heating elements

• A tool for programming microcontrollers

Which bus architecture is used to connect computers to peripherals like disk drives?

• SCSI

• USB

• FireWire

• ISA

What is the function of a MAC protocol in a bus architecture?

• Handle requests according to priorities

• Detect collision and try again

• Control the brightness of LED lights

• Transmit data asynchronously

What is the data rate of USB 3.0?

• 1Gbits/sec

• 480Mbits/sec

• 12Mbits/sec

• Up to 4.8Gbits/sec