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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
VCC
root hubs hubs
USB host controller driver
motherboard
2. HCD scheduling depends on ___ of transaction - ______ requirements of the device and _______ ______ of other USB devices
permanently
12 Mb/s
low cost
type transfer transaction traffic
3. Under XP - USB activity can be monitored and controlled by using ______________
series B plug
initiates transfers
device manager
white
4. How many volts does the USB cable supply?
VCC
5.0 VDC voltage
500 MA
egisters memory
5. HCD initiates transaction using both _______ ____ and _____
power contacts
egisters memory
low cost
root hubs hubs
6. USBD stands for?
usb driver
initiates transfers
4.8 Gb/s
retried
7. What schedules USB transactions?
5.0 VDC voltage
USB host controller driver
read transaction
twisted pair
8. Up to ___ devices can be attached to single USB port
USB device endpoints
127
500 MA
forwarded
9. USB registers are indirectly accessed by ___ _____ ________
1.5 Mb/s
USB device drivers
permanently
usb driver
10. What contacts are longer on a USB connector?
host attachment and detachement
USB device endpoints
power contacts
known only
11. Device attachment is automatically detected - Software automatically configured - Device available for immediate use. This describes ______ _______ technology
4.8 Gb/s
5.0 VDC voltage
hot plug
memory buffer
12. USB 1.1 supports a speed of up to __________
480 Mb/s
root hub
12 Mb/s
known only
13. What transfer is used to transfer specific requests to USB devices
usb driver
480 Mb/s
Control Transfer
device drivers
14. USB has no requirement for __________ _________
system resources
1 ms
127
controller repeater
15. Transmissions starting at the host arrive the hub's _______ _______
system resources
USB device endpoints
root port
power contacts
16. What contacts are longer on a USB connector?
white
power contacts
upstream
read transaction
17. If an error is found - it is forwarded to the _______ ___________
host controller
parallel to serial
interfaces services
USB Universal Host Controller
18. SOF stands for ________ __________ __________-
5 meters
start of fram
3 ms
12 Mb/s
19. The maximum length of a USB cable is __________
1.5 Mb/s
white
error checking
5 meters
20. USB devices contain _________ - which is another word for ____________
4.8 Gb/s
egisters memory
twisted pair
127
21. _____________ is the hub port connector while the Series A plug is attached to the cable
127
usb driver
known only
Series A receptacle
22. List - in order - the color of each USB cable: red ____ green black
Transfers
4
known only
white
23. How many contacts does each connector have?
USB driver
system resources
4
12 Mb/s
24. the IRP ______ ________ to or from a target USB device
low cost
initiates transfers
500 MA
USB device endpoints
25. USB is a ____ _______ method of adding peripherals to PC's
Device Configuration
root port
low cost
usb driver
26. USB devices enter a "suspend" state after ______________ of no bus activity
series B plug
3 ms
root port
twisted pair
27. USB has no requirement for __________ _________
system resources
Enhanced Host Controller Interface
VCC
twisted pair
28. List - in order - the color of each USB cable: red ____ green black
white
USB Universal Host Controller
device manager
single connector
29. What conversion must happen before the data can be forwarded to root hub?
USB hot controller driver
initiates transfers
parallel to serial
12 Mb/s
30. _____________ is the hub port connector while the Series A plug is attached to the cable
power ports recognizes status events
Series A receptacle
1 ms
Functional View
31. USB root hub and the target devices perform __________ ___________ during each transaction
error checking
egisters memory
EHCI
USB Universal Host Controller
32. Device attachment is automatically detected - Software automatically configured - Device available for immediate use. This describes ______ _______ technology
hot plug
twisted pair
Enhanced Host Controller Interface
power contacts
33. Two key functions of USB System Software: _______ - Bandwidth Allocation - or Transaction scheduling
Device Configuration
initiates transfers
500 MA
no
34. The ________________ is attached to the cable
system resources
low cost
series B plug
Control Transfer
35. USB 1.1 supports a speed of up to __________
device drivers
type transfer transaction traffic
initiates transfers
12 Mb/s
36. Device attachment is automatically detected - Software automatically configured - Device available for immediate use. This describes ______ _______ technology
hot plug
power contacts
Transfers
usb driver
37. What was developed by and is licensed by Intel for USB 2.0?
root hub
egisters memory
USB hot controller driver
EHCI
38. The Host Controller executes the frame lists at ___ intervals
device manager
power contacts
upstream
1 ms
39. USB 1 supports a speed of up to __________
1.5 Mb/s
4.8 Gb/s
480 Mb/s
root hub
40. In basic USB Transaction - each transaction starts with a ______ ______
packet transmission
root hub
fireware descriptors
Enhanced Host Controller Interface
41. In a Series A connector - one end of the cable is __________ attached to the device
permanently
5.0 VDC voltage
1.5 Mb/s
USB device endpoints
42. Up to ___ devices can be attached to single USB port
motherboard
single connector
127
memory buffer
43. List - in order - the color of each USB cable: red ____ green black
white
1.5 Mb/s
Basic USB Transaction
1 ms
44. USB system software consists of USBD and ___ _____ _________ ________
Device Configuration
USB hot controller driver
type transfer transaction traffic
white
45. What was developed by and is licensed by Intel for USB 2.0?
EHCI
interfaces services
USB device endpoints
Control Transfer
46. the USB driver provides __________ and ___________ for client software drivers
VCC
interfaces services
series B plug
EHCI
47. The Series B receptacle is attached to the ___________
VCC
twisted pair
hot plug
device
48. USB standards define a __________ __________ type to attach any USB device to a PC
single connector
127
4
hot plug
49. The Series B receptacle is attached to the ___________
EHCI
device
series B plug
series B plug
50. USB 2 supports a speed of up to __________
USB device endpoints
upstream
low cost
480 Mb/s