Test: USB - Input-Output Organization


25 Questions MCQ Test Computer Architecture & Organisation (CAO) | Test: USB - Input-Output Organization


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QUESTION: 1

The transfer rate, when the USB is operating in low-speed of operation is _____

Solution:

Answer: d
Explanation: The USB has two rates of operation the low-speed and the full-speed one.

QUESTION: 2

THe high speed mode of operation of the USB was introduced by _____

Solution:

Answer: c
Explanation: The high-speed mode of operation was introduced with USB 2.0,which enabled the USB to operatte at 480 Mb/s.

QUESTION: 3

The sampling process in speaker output is a ________ process.

Solution:

Answer: c
Explanation: The isochronous process means each bit of data is seperated by a time interval.

QUESTION: 4

 The USB device follows _______ structure.

Solution:

Answer: d
Explanation: The USB has a tree structure with the root hub at the centre.

QUESTION: 5

The I/O devices form the _____ of the tree structure.

Solution:

Answer: a
Explanation: The I/o devices form the leaves of the structure.

QUESTION: 6

USB is a parallel mode of transmission of data and this enables for the fast speeds of data transfers. 

Solution:

Answer: b
Explanation: The USB does a serial mode of data transfer.

QUESTION: 7

 In USB the devices can communicate with each other.

Solution:

Answer: b
Explanation: It allows only the host to communicate with the devices and not between themselves.

QUESTION: 8

 The device can send a message to the host by taking part in _____ for the communication path.

Solution:
QUESTION: 9

When the USB is connected to a system, its root hub is connected to the ________

Solution:

Answer: c
Explanation: The USB’s root is connected to the processor directly using the BUS.

QUESTION: 10

The devices connected to USB is assigned an ____ adrress.

Solution:

Answer: d
Explanation: To make it easier for recognition the devices are given 7 bit addresses.

QUESTION: 11

The USB address space can be shared by the user’s memory space. 

Solution:

Answer: b
Explanation: The USB memory space is not under any address sapces and cannot be accessed.

QUESTION: 12

The initial address of a device just connected to the HUB is ____ .

Solution:

Answer: b
Explanation: By standard the usual address of a new device is zero.

QUESTION: 13

Locations in the device to or from which data transfers can take place is called ____

Solution:
QUESTION: 14

A USB pipe is a ______ channel.

Solution:

Answer: c
Explanation: This means that the pipe is bi-directional in sending messages or information.

QUESTION: 15

The type/s of packets sent by the USB is/are _______

Solution:

Answer: d
Explanation: This means that the usb gets both data and control signlas required for the transfer operation.

QUESTION: 16

The first feild of any packet is _____

Solution:

Answer: a
Explanation: The PID is the field that is used to identify the device (the device id).

QUESTION: 17

The 4 bit PID’s are transmitted twice. 

Solution:

Answer: a
Explanation: The fields are transmitted twice, once with the true values and the second time with the complemented values.

QUESTION: 18

 The last field in the packet is ______

Solution:

Answer: d
Explanation: The last 5 bits of the packet is used for error checking, that is cyclic redundancy check.

QUESTION: 19

 The CRC bits are computed based on the values of the _____

Solution:

Answer: d
Explanation: The CRC bits are calculated based on the values of the address and endp.

QUESTION: 20

 The data packets can contain data upto ______

Solution:
QUESTION: 21

 The most important objective of the USB is to provide ______

Solution:

Answer: d
Explanation: The above are all the common features of the USB.

QUESTION: 22

The transmission over the USB is divided into ____

Solution:

Answer: a
Explanation: To support the isochronous mode of operation the usb transmission is divided into frames.

QUESTION: 23

The _____ signal is used to indiacate the beginning of a new frame.

Solution:

Answer: b
Explanation: The SOF(State Of Frame) is used to inidicate the beginning of a new frame.

QUESTION: 24

The SOF is transmitted every ______

Solution:
QUESTION: 25

The power specification of usb is _____

Solution:

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