MCQs of Input-Output Organization (Computer Organization & Architecture - 3140707)

Computer Organization & Architecture (3140707) MCQs

MCQs of Input-Output Organization

Showing 11 to 20 out of 30 Questions

11.

The transmitter rests at the _______ when no characters are transmitted in asynchronous serial transfer.

(a)	1-state
(b)	0-state
(c)	Blank state
(d)	Depends on receiver type

12.

The start bit in asynchronous serial transfer is always ______.

(a)	1
(b)	Depends on transmitter
(c)	0
(d)	X (Don't care)

13.

Which of the combination can be used as stop bits in asynchronous serial transfer?

(a)	01
(b)	11
(c)	10
(d)	00

14.

Which is defined as the rate at which serial information is transmitted and is equivalent to the data transfer in bits per second?

(a)	Baud rate
(b)	Quad rate
(c)	Packet rate
(d)	None of above

15.

Which of the following is not a valid mode of transfer between central computer and I/O devices?

(a)	DMA
(b)	Programmed I/O
(c)	Interrupt-initiated I/O
(d)	Memory I/O

16.

Which of the mode is more time consuming compare to others?

(a)	Interrupt-initiated I/O
(b)	DMA
(c)	Programmed I/O
(d)	Both B & C

17.

Full-form of DMA?

(a)	Dynamic memory access
(b)	Direct memory access
(c)	Direct memory asynchronous
(d)	Dynamic memory asynchronous

18.

In programmed I/O mode, which process should be done if flag bit of status register is 1?

(a)	Read status register
(b)	Transfer data to memory
(c)	Read data register
(d)	Continue with program

19.

In which of the following, the branch address is assigned to a fixed location in memory?

(a)	Non-vectored interrupt
(b)	Vectored interrupt
(c)	Both A & B
(d)	None of above

20.

Which interrupt method has disadvantage that if there are many interrupts, the time required to examine them can exceed the time available to service the I/O device?

(a)	Daisy-chaining priority
(b)	Parallel priority interrupt
(c)	DMA
(d)	Polling

Showing 11 to 20 out of 30 Questions