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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. _____- data + data ground - List - in order - the purpose of each contact in a USB connector 1 - 2 - 3 - 4
hot plug
host controller
4.8 Gb/s
VCC
2. What was developed by and is licensed by Intel for USB 2.0?
Transfers
127
permanently
EHCI
3. The Series B receptacle is attached to the ___________
4
Functional View
device
single connector
4. Each connected USB device is assigned an address ___________ ______ to the USB system
known only
1 ms
initiates transfers
127
5. USB is a ____ _______ method of adding peripherals to PC's
VCC
low cost
500 MA
motherboard
6. Transmissions starting at the host arrive the hub's _______ _______
root port
5 meters
twisted pair
4.8 Gb/s
7. The HCD schedules transactions by building a series of transaction lists called ________ _________
USB device drivers
device
host controller
frame lists
8. The maximum current a USB cable will deliver is _________
no
500 MA
Series A receptacle
5.0 VDC voltage
9. USB 1.1 supports a speed of up to __________
VCC
USB device endpoints
12 Mb/s
root port
10. The maximum current a USB cable will deliver is _________
EHCI
Hardware & Software
500 MA
twisted pair
11. USB 1.1 supports a speed of up to __________
12 Mb/s
low cost
interfaces services
host controller
12. The maximum length of a USB cable is __________
power ports recognizes status events
USB host controller driver
permanently
5 meters
13. The maximum length of a USB cable is __________
5 meters
series B plug
start of fram
read transaction
14. Bulk - Isochronous - Interrupt - and Control are types of what?
Transfers
low cost
initiates transfers
permanently
15. The USB cable must be shielded and _________ ______
twisted pair
USB device drivers
frame lists
12 Mb/s
16. The ________________ is attached to the cable
Device Configuration
error checking
series B plug
white
17. the USB driver provides __________ and ___________ for client software drivers
USB device endpoints
EHCI
interfaces services
device
18. USB standards define a __________ __________ type to attach any USB device to a PC
single connector
white
device drivers
type transfer transaction traffic
19. the IRP ______ ________ to or from a target USB device
initiates transfers
power contacts
device manager
4
20. The USB cable must be shielded and _________ ______
power ports recognizes status events
twisted pair
device manager
VCC
21. What provides attachment points for USB devices?
Series A receptacle
twisted pair
root hubs hubs
root hub
22. SOF stands for ________ __________ __________-
3 ms
start of fram
EHCI
power contacts
23. EHCI stands for
single connector
Enhanced Host Controller Interface
read transaction
device manager
24. What transfer is used to transfer specific requests to USB devices
Control Transfer
root port
device
controls
25. USB registers are indirectly accessed by ___ _____ ________
root hubs hubs
permanently
USB device drivers
4
26. What contacts are longer on a USB connector?
127
white
series B plug
power contacts
27. What conversion must happen before the data can be forwarded to root hub?
480 Mb/s
parallel to serial
Enhanced Host Controller Interface
twisted pair
28. USB has no requirement for __________ _________
power contacts
interfaces services
known only
system resources
29. USB registers are known as ____ _________ __________
USB device endpoints
series B plug
Transfers
USB device drivers
30. USB devices contain _________ - which is another word for ____________
EHCI
upstream
egisters memory
low cost
31. _____- data + data ground - List - in order - the purpose of each contact in a USB connector 1 - 2 - 3 - 4
Enhanced Host Controller Interface
500 MA
egisters memory
VCC
32. The characteristics of an USB device are detected by the _____ ______ during device configuration
USB driver
start of fram
series B plug
twisted pair
33. What contacts are longer on a USB connector?
5.0 VDC voltage
constant data rate
power contacts
hot plug
34. USB devices enter a "suspend" state after ______________ of no bus activity
upstream
Enhanced Host Controller Interface
motherboard
3 ms
35. USB 1 supports a speed of up to __________
1.5 Mb/s
root hub
3 ms
power contacts
36. USB 1 supports a speed of up to __________
1.5 Mb/s
Transfers
initiates transfers
series B plug
37. USB has no requirement for __________ _________
packet transmission
system resources
3 ms
upstream
38. How many volts does the USB cable supply?
3 ms
device
1.5 Mb/s
5.0 VDC voltage
39. USB standards define a __________ __________ type to attach any USB device to a PC
forwarded
constant data rate
egisters memory
single connector
40. Isochronous Transfer are used by applications that require a ______ _______ ______
permanently
500 MA
parallel to serial
constant data rate
41. What are the USB system's two primary elements?
5.0 VDC voltage
known only
4
Hardware & Software
42. In a Series A connector - one end of the cable is __________ attached to the device
permanently
VCC
low cost
USB Universal Host Controller
43. List - in order - the color of each USB cable: red ____ green black
controller repeater
white
Interrupt Transfer
EHCI
44. In a Series A connector - one end of the cable is __________ attached to the device
Series A receptacle
twisted pair
5.0 VDC voltage
permanently
45. USB devices contain _________ - which is another word for ____________
3 ms
VCC
egisters memory
480 Mb/s
46. Bus traffic arriving at the hub must be _________
device
500 MA
forwarded
5 meters
47. The Host Controller executes the frame lists at ___ intervals
device manager
single connector
no
1 ms
48. Device attachment is automatically detected - Software automatically configured - Device available for immediate use. This describes ______ _______ technology
hot plug
controls
USB device endpoints
VCC
49. USBD stands for?
controls
low cost
usb driver
127
50. USB system software consists of USBD and ___ _____ _________ ________
USB hot controller driver
low cost
controls
VCC