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Test your basic knowledge |
Usb Technology
Start Test
Study First
Subject
:
it-skills
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Device attachment is automatically detected - Software automatically configured - Device available for immediate use. This describes ______ _______ technology
500 MA
hot plug
permanently
Hardware & Software
2. What was developed by and is licensed by Intel for USB 2.0?
initiates transfers
device drivers
12 Mb/s
EHCI
3. SOF stands for ________ __________ __________-
start of fram
Enhanced Host Controller Interface
egisters memory
root hub
4. The HCD schedules transactions by building a series of transaction lists called ________ _________
Hardware & Software
low cost
frame lists
low cost
5. USB standards define a __________ __________ type to attach any USB device to a PC
single connector
4
twisted pair
read transaction
6. The ________________ is attached to the cable
series B plug
Series A receptacle
Basic USB Transaction
memory buffer
7. USB devices contain _________ - which is another word for ____________
egisters memory
1 ms
power ports recognizes status events
Interrupt Transfer
8. Isochronous Transfer are used by applications that require a ______ _______ ______
device
permanently
500 MA
constant data rate
9. _____________ is the hub port connector while the Series A plug is attached to the cable
constant data rate
Series A receptacle
root hub
EHCI
10. 2 USB Data Transfers: __________ and System View
controls
initiates transfers
interfaces services
Functional View
11. When the target device responds to a host initiated transaction - it must transmit a response ________
Series A receptacle
upstream
500 MA
USB hot controller driver
12. Bus traffic arriving at the hub must be _________
4
white
forwarded
3 ms
13. USBD stands for?
device manager
VCC
usb driver
500 MA
14. USB 1 supports a speed of up to __________
memory buffer
egisters memory
1.5 Mb/s
type transfer transaction traffic
15. Up to ___ devices can be attached to single USB port
twisted pair
USB Universal Host Controller
127
power contacts
16. The hub controller _________ the powering and enabling of ports
low cost
127
interfaces services
controls
17. USB 1.1 supports a speed of up to __________
127
controls
motherboard
12 Mb/s
18. USB is a ____ _______ method of adding peripherals to PC's
USB Universal Host Controller
power contacts
low cost
USB device drivers
19. The polling rate of what type of transfer must be frequent enough that data is not lost but not so frequent as to waste bandwidth
permanently
500 MA
no
Interrupt Transfer
20. USB standards define a __________ __________ type to attach any USB device to a PC
single connector
Basic USB Transaction
5 meters
12 Mb/s
21. How many contacts does each connector have?
white
4
read transaction
480 Mb/s
22. HCD initiates transaction using both _______ ____ and _____
root hubs hubs
500 MA
USB Universal Host Controller
constant data rate
23. Bulk - Isochronous - Interrupt - and Control are types of what?
USB device endpoints
motherboard
Series A receptacle
Transfers
24. USB 3 supports a speed of up to __________
4.8 Gb/s
controller repeater
5 meters
VCC
25. Transmissions starting at the host arrive the hub's _______ _______
device drivers
1 ms
root port
error checking
26. USB devices contain _________ - which is another word for ____________
egisters memory
white
device
memory buffer
27. Up to ___ devices can be attached to single USB port
packet transmission
low cost
VCC
127
28. What contacts are longer on a USB connector?
known only
Enhanced Host Controller Interface
Enhanced Host Controller Interface
power contacts
29. Every transaction on the USB originates at the ____ ____
root hub
Basic USB Transaction
parallel to serial
upstream
30. The root hub controls _______ to USB ports - enables and disables _____ - _________ devices attached to ports and sets and reports _______ ______ associated with each port
power ports recognizes status events
memory buffer
device manager
USB device drivers
31. USB is a ____ _______ method of adding peripherals to PC's
low cost
single connector
known only
Series A receptacle
32. What conversion must happen before the data can be forwarded to root hub?
device
root hubs hubs
twisted pair
parallel to serial
33. USB has no requirement for __________ _________
system resources
permanently
parallel to serial
white
34. EHCI stands for
Series A receptacle
memory buffer
upstream
Enhanced Host Controller Interface
35. USB standards define a __________ __________ type to attach any USB device to a PC
127
Series A receptacle
white
single connector
36. USB is a ____ _______ method of adding peripherals to PC's
low cost
Basic USB Transaction
USB Universal Host Controller
initiates transfers
37. If an error is found - it is forwarded to the _______ ___________
3 ms
host controller
constant data rate
5 meters
38. USB registers are known as ____ _________ __________
device
USB device endpoints
VCC
no
39. The characteristics of an USB device are detected by the _____ ______ during device configuration
twisted pair
parallel to serial
USB driver
Functional View
40. Under XP - USB activity can be monitored and controlled by using ______________
Series A receptacle
device manager
series B plug
4
41. The Host Controller executes the frame lists at ___ intervals
500 MA
Hardware & Software
Functional View
1 ms
42. The maximum length of a USB cable is __________
4.8 Gb/s
low cost
Device Configuration
5 meters
43. The Series B receptacle is attached to the ___________
1.5 Mb/s
device
USB driver
power contacts
44. What is a USB endpoint address an example of?
Basic USB Transaction
hot plug
device
1.5 Mb/s
45. How many volts does the USB cable supply?
5.0 VDC voltage
480 Mb/s
twisted pair
packet transmission
46. The USB cable must be shielded and _________ ______
no
twisted pair
4
Series A receptacle
47. What was developed by and is licensed by Intel for USB 2.0?
Functional View
EHCI
power ports recognizes status events
Device Configuration
48. USB has no requirement for __________ _________
EHCI
480 Mb/s
single connector
system resources
49. USB 2 supports a speed of up to __________
480 Mb/s
5.0 VDC voltage
Series A receptacle
permanently
50. How many volts does the USB cable supply?
USB device endpoints
power contacts
5.0 VDC voltage
480 Mb/s