22BIT315 OS quiz

A ________ bus connects the processor-memory subsystem to fast devices.

• Expansion bus

• PCI bus

• Address bus

• SCSI BUS

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

• Interrupt

• Processor

• Controller

• Disk controller

_______ is a single chip or a portion of chip in the computer that controls the signals on the wires of a serial port.

• Serial-port controller

• PCI bus

• Processor

• I/O device

The hardware mechanism that enables a device to notify the CPU is called _________.

• Polling

• Direct memory access

• I/O request

• Interrupt

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

• Interrupt-controller hardware

• Interrupt-handler routine

• Memory controller

• Interrupt-request line

Computers have more devices than they have address elements in the interrupt vector. A common way to solve this problem is to use __________.

• Interrupt bonding

• Interrupt chaining

• Interrupt linking

• Interrupt grouping

The _________ interrupt is reserved for events such as unrecoverable memory errors.

• Non maskable interrupt

• Software interrupt

• Maskable interrupt

• Hardware interrupt

To initiate a DMA transfer, the host writes a DMA command block into ________.

• CPU

• Processor

• Memory

• I/O devices

Handshaking between the DMA controller and the device controller is performed via a pairs of wires called ________ and ________.

• DMA-reply, DMA request

• DMA-request, DMA-acknowledge

• DMA-acknowledge, DMA-reply

• DMA-reply,

  DMA-transfer

The direct access can be used to achieve _______ , since it can avoid kernel communication, context switches and layers of kernel software.

• High latency

• High transfer

• High performance

• High memory access