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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. USB standards define a __________ __________ type to attach any USB device to a PC
power contacts
known only
upstream
single connector
2. Hubs are critical in the ____________________ of USB devices
controller repeater
root hub
4
host attachment and detachement
3. The HCD schedules transactions by building a series of transaction lists called ________ _________
frame lists
motherboard
error checking
host controller
4. USB registers are indirectly accessed by ___ _____ ________
constant data rate
no
Device Configuration
USB device drivers
5. the IRP ______ ________ to or from a target USB device
root hubs hubs
initiates transfers
controller repeater
USB hot controller driver
6. The maximum length of a USB cable is __________
5 meters
127
127
4
7. 2 USB Data Transfers: __________ and System View
Functional View
series B plug
127
known only
8. _____________ is the hub port connector while the Series A plug is attached to the cable
controls
Enhanced Host Controller Interface
Series A receptacle
single connector
9. Up to ___ devices can be attached to single USB port
white
5.0 VDC voltage
Series A receptacle
127
10. the USB driver provides __________ and ___________ for client software drivers
interfaces services
twisted pair
VCC
500 MA
11. Up to ___ devices can be attached to single USB port
motherboard
127
retried
root hub
12. When writing to a USB device - the host controller reads data from the host _________ __________
5 meters
memory buffer
USB host controller driver
EHCI
13. _____- data + data ground - List - in order - the purpose of each contact in a USB connector 1 - 2 - 3 - 4
root hubs hubs
3 ms
Enhanced Host Controller Interface
VCC
14. How many volts does the USB cable supply?
500 MA
white
5.0 VDC voltage
hot plug
15. In basic USB Transaction - each transaction starts with a ______ ______
host controller
packet transmission
500 MA
series B plug
16. The ________________ is attached to the cable
480 Mb/s
series B plug
error checking
Control Transfer
17. The hub controller contains ___________ read by software that identify the device as a hub
no
fireware descriptors
memory buffer
5.0 VDC voltage
18. The Series B receptacle is attached to the ___________
1.5 Mb/s
500 MA
device
fireware descriptors
19. What contacts are longer on a USB connector?
USB device drivers
single connector
system resources
power contacts
20. USB 2 supports a speed of up to __________
system resources
Device Configuration
low cost
480 Mb/s
21. USB 1 supports a speed of up to __________
5.0 VDC voltage
EHCI
1.5 Mb/s
interfaces services
22. What was developed by and is licensed by Intel for USB 2.0?
single connector
EHCI
480 Mb/s
Enhanced Host Controller Interface
23. The USB cable must be shielded and _________ ______
4.8 Gb/s
USB device drivers
twisted pair
4
24. The maximum current a USB cable will deliver is _________
4
500 MA
USB device drivers
type transfer transaction traffic
25. Up to ___ devices can be attached to single USB port
127
4
power ports recognizes status events
USB hot controller driver
26. HCD initiates transaction using both _______ ____ and _____
127
4
packet transmission
root hubs hubs
27. The characteristics of an USB device are detected by the _____ ______ during device configuration
low cost
egisters memory
USB driver
fireware descriptors
28. EHCI stands for
retried
usb driver
Enhanced Host Controller Interface
USB hot controller driver
29. How many contacts does each connector have?
hot plug
Device Configuration
4
USB Universal Host Controller
30. The Series B receptacle is attached to the ___________
device
egisters memory
Series A receptacle
127
31. The Series B receptacle is attached to the ___________
5 meters
5 meters
Device Configuration
device
32. The USB cable must be shielded and _________ ______
twisted pair
12 Mb/s
3 ms
5 meters
33. USB 3 supports a speed of up to __________
hot plug
series B plug
upstream
4.8 Gb/s
34. USB root hub and the target devices perform __________ ___________ during each transaction
host controller
error checking
500 MA
controls
35. USB standards define a __________ __________ type to attach any USB device to a PC
single connector
upstream
127
VCC
36. The root hub is located on the ___________
motherboard
1.5 Mb/s
127
4.8 Gb/s
37. The ________________ is attached to the cable
series B plug
USB device endpoints
hot plug
4
38. USB registers are known as ____ _________ __________
low cost
USB device endpoints
device manager
start of fram
39. USB devices contain _________ - which is another word for ____________
127
5 meters
egisters memory
4
40. _____________ is the hub port connector while the Series A plug is attached to the cable
Series A receptacle
USB host controller driver
series B plug
system resources
41. Transmissions starting at the host arrive the hub's _______ _______
USB device endpoints
root port
no
root hub
42. The root hub controls _______ to USB ports - enables and disables _____ - _________ devices attached to ports and sets and reports _______ ______ associated with each port
power contacts
Basic USB Transaction
power contacts
power ports recognizes status events
43. What provides attachment points for USB devices?
1.5 Mb/s
forwarded
root hub
usb driver
44. Under XP - USB activity can be monitored and controlled by using ______________
device manager
USB Universal Host Controller
4
EHCI
45. The maximum length of a USB cable is __________
5 meters
VCC
4
Series A receptacle
46. USB has no requirement for __________ _________
VCC
twisted pair
device manager
system resources
47. The ________________ is attached to the cable
Enhanced Host Controller Interface
Hardware & Software
USB hot controller driver
series B plug
48. Transaction instructions generated by the ____ ____________ are forwarded to the root hub
motherboard
host controller
interfaces services
4.8 Gb/s
49. SOF stands for ________ __________ __________-
type transfer transaction traffic
4.8 Gb/s
start of fram
single connector
50. _____ ___________ issue requests to the USB driver using I/O Request Packets (IRPs)
controller repeater
root hub
device drivers
power contacts