Input Output Organization MCQs
Input Output Organization MCQs : This section focuses on "I/O Organization" of Computer Organization & Architecture. These Multiple Choice Questions (MCQ) should be practiced to improve the Computer Organization & Architecture skills required for various interviews (campus interview, walk-in interview, company interview), placements, entrance exams and other competitive examinations.
1. Input or output devices that are connected to computer are called ______________.
A. Input/Output Subsystem
B. Peripheral Devices
C. Interfaces
D. Interrupt
View Answer
Ans : B
Explanation: Input or output devices that are connected to computer are called peripheral devices.
2. How many types of modes of I/O Data Transfer?
A. 2
B. 3
C. 4
D. 5
View Answer
Ans : B
Explanation: Generally three types of modes which are : Programmed I/O, Interrupt Initiated I/O, Direct Memory Access
3. Keyboard and Mouse Comes under?
A. Input peripherals
B. Output peripherals
C. Input-Output peripherals
D. None of the above
View Answer
Ans : A
Explanation: Allows user input, from the outside world to the computer. Example: Keyboard, Mouse etc.
4. The method which offers higher speeds of I/O transfers is ___________
A. Interrupts
B. Memory mapping
C. Program-controlled I/O
D. DMA
View Answer
Ans : D
Explanation: In DMA the I/O devices are directly allowed to interact with the memory without the intervention of the processor and the transfers take place in the form of blocks increasing the speed of operation.
5. In memory-mapped I/O ____________
A. The I/O devices have a separate address space
B. The I/O devices and the memory share the same address space
C. A part of the memory is specifically set aside for the I/O operation
D. The memory and I/O devices have an associated address space
View Answer
Ans : B
Explanation: Its the different modes of accessing the i/o devices.
6. The ________ circuit is basically used to extend the processor BUS to connect devices.
A. Router
B. Router
C. Bridge
D. None of the above
View Answer
Ans : C
Explanation: The bridge circuit is basically used to extend the processor BUS to connect devices.
7. The ISA is an architectural standard developed by ______.
A. IBM
B. AT&T Labs
C. Microsoft
D. Oracle
View Answer
Ans : A
Explanation: Industry Standard Architecture is an architectural standard developed by IBM for its PC's.
8. The SCSI BUS is used to connect the video devices to a processor by providing a ______________.
A. Single Bus
B. USB
C. SCSI
D. parallel BUS.
View Answer
Ans : D
Explanation: The SCSI BUS is used to connect the video devices to a processor by providing a parallel BUS.
9. Which of the following is true about DMA?
A. DMA is an approach of performing data transfers in bulk between memory and the external device without the intervention of the processor.
B. The DMA controller acts as a processor for DMA transfers and overlooks the entire process.
C. The DMA controller has 3 registers.
D. All of the above
View Answer
Ans : D
Explanation: all of the above statement is true regarding DMA.
10. The registers of the controller are ______
A. 16 bit
B. 32 bit
C. 64 bit
D. 128 bit
View Answer
Ans : B
Explanation: The registers of the controller are 32 bit.
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