CO321 Embedded Systems Interrupts 2

What is the main role of a device driver?

• Manage cache
• Provide memory
• Interface between OS and hardware
• Control kernel log

Device drivers operate in which mode?

• User
• Kernel
• Admin
• BIOS

Which of these is a block device?

• Mouse
• Hard drive
• Monitor
• Printer

Where are device files located in Linux?

• /etc
• /usr
• /dev
• /bin

Which of these is a character device?

• Printer
• Keyboard
• Hard disk
• DVD drive

Which assigns major numbers in Linux?

• User
• BIOS
• Kernel
• Makefile

Why are Linux drivers kernel modules?

• Boot faster
• User-space access
• Hot-plugging
• Avoid logs

Device drivers communicate using:

• Sockets
• System calls
• Device files
• Ports

What triggers an interrupt?

• Clock pulse
• Polling event
• Hardware/software event
• Register flag

What is ISR?

• Main function
• Interrupt routine
• BIOS loader
• Scheduler