Q. A ________ is a collection of electronics that can operate a port, a bus, or a device.

View solution

Q. An I/O port typically consists of four registers status, control, ________ and ________ registers.

View solution

Q. The ______ register is read by the host to get input.

View solution

Q. The ______ register is written by the host to send output.

View solution

Q. The hardware mechanism that allows a device to notify the CPU is called _______

View solution

Q. The CPU hardware has a wire called __________ that the CPU senses after executing every instruction.

View solution

Q. The _________ determines the cause of the interrupt, performs the necessary processing and executes a return from the interrupt instruction to return the CPU to the execution state prior to the interrupt.

View solution

Q. In general the two interrupt request lines are :

View solution

Q. The _________ are reserved for events such as unrecoverable memory errors.

View solution

Q. The ________ can be turned off by the CPU before the execution of critical instruction sequences that must not be interrupted.

View solution

Q. The __________ is used by device controllers to request service.

View solution

Q. The interrupt vector contains :

View solution

Q. Division by zero, accessing a protected or non existent memory address, or attempting to execute a privileged instruction from user mode are all categorized as ________

View solution

Q. For large data transfers, _________ is used.

View solution

Q. A character stream device transfers :

View solution

Q. A block device transfers :

View solution

Q. A dedicated device is :

View solution

Q. A keyboard is an example of a device that is accessed through a __________ interface.

View solution

Q. In polling :

View solution

Q. A non blocking system call _________________

View solution