1
In memory-mapped I/O ____________
Correct Answer
The I/O devices and the memory share the same address space
☑ MCQ PRACTICE
Computer Organization and Architecture Unit 4
Practice objective questions for quick revision and examination preparation. Try answering each question before revealing the answer.
Computer Organization and Architecture - Unit-4
2
The advantage of I/O mapped devices over memory mapped is:
Correct Answer
The devices have to deal with fewer address lines
3
To overcome the lag in the operating speeds of the I/O device and the processor, we use:
Correct Answer
Status flags
4
The method which offers higher speeds of I/O transfers is:
Correct Answer
DMA
5
The process wherein the processor constantly checks the status flags is called:
Correct Answer
Polling
6
The process that periodically checks the status of I/O devices is known as:
Correct Answer
Polling
7
A unit on the bus that initiates bus requests is called:
Correct Answer
Bus master
8
A scheme in which portions of I/O address space are given to I/O devices is called:
Correct Answer
Both a and b
9
The DMA differs from the interrupt mode by:
Correct Answer
None of the mentioned
10
The DMA transfers are performed by a control circuit called:
Correct Answer
DMA controller
11
In DMA transfers, the required signals and addresses are given by the:
Correct Answer
DMA controllers
12
After the completion of the DMA transfer, the processor is notified by:
Correct Answer
Interrupt signal
13
The DMA controller has _______ registers.
Correct Answer
3
14
When the R/W bit of the status register of the DMA controller is set to 1:
Correct Answer
Read operation is performed
15
The controller is connected to the ____.
Correct Answer
System bus
16
Can a single DMA controller perform operations on two different disks simultaneously?
Correct Answer
True
17
The technique whereby the DMA controller steals the access cycles of the processor to operate is called:
Correct Answer
Cycle stealing
18
The technique where the controller is given complete access to main memory is ________________________.
Correct Answer
Burst mode
19
The controller uses _____ to help with the transfers when handling network interfaces.
Correct Answer
Input buffer storage
20
To overcome the conflict over the possession of the bus, we use ______.
Correct Answer
Bus arbitrators