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