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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. The USB cable must be shielded and _________ ______
low cost
USB device endpoints
retried
twisted pair
2. _____________ is the hub port connector while the Series A plug is attached to the cable
Series A receptacle
USB device endpoints
system resources
twisted pair
3. 2 USB Data Transfers: __________ and System View
4.8 Gb/s
Functional View
5 meters
white
4. USB devices contain _________ - which is another word for ____________
no
VCC
egisters memory
low cost
5. Three operations Serial Bus Controllers using Device Manager under Windows will allow you to examine and /or control: _______ - USB Root Hub - USB Devices
no
USB Universal Host Controller
5 meters
12 Mb/s
6. The ________________ is attached to the cable
device manager
Enhanced Host Controller Interface
127
series B plug
7. The HCD schedules transactions by building a series of transaction lists called ________ _________
USB hot controller driver
Transfers
Series A receptacle
frame lists
8. The maximum current a USB cable will deliver is _________
500 MA
127
Series A receptacle
root hub
9. USB 1.1 supports a speed of up to __________
low cost
VCC
12 Mb/s
permanently
10. Device attachment is automatically detected - Software automatically configured - Device available for immediate use. This describes ______ _______ technology
controls
device drivers
5 meters
hot plug
11. HCD scheduling depends on ___ of transaction - ______ requirements of the device and _______ ______ of other USB devices
USB Universal Host Controller
type transfer transaction traffic
usb driver
single connector
12. The maximum current a USB cable will deliver is _________
power contacts
USB hot controller driver
power contacts
500 MA
13. USB 1 supports a speed of up to __________
USB Universal Host Controller
1.5 Mb/s
constant data rate
4
14. A root hub consists of a hub _________ and hub __________
controller repeater
fireware descriptors
hot plug
device
15. the USB driver provides __________ and ___________ for client software drivers
interfaces services
hot plug
forwarded
USB device drivers
16. _____________ is the hub port connector while the Series A plug is attached to the cable
1.5 Mb/s
Series A receptacle
white
Transfers
17. What was developed by and is licensed by Intel for USB 2.0?
EHCI
Basic USB Transaction
white
4.8 Gb/s
18. In ther case of error - transactions are what?
retried
Series A receptacle
USB device drivers
Device Configuration
19. The maximum length of a USB cable is __________
Enhanced Host Controller Interface
USB hot controller driver
fireware descriptors
5 meters
20. Transaction instructions generated by the ____ ____________ are forwarded to the root hub
host controller
3 ms
5.0 VDC voltage
Enhanced Host Controller Interface
21. The ________________ is attached to the cable
memory buffer
Series A receptacle
series B plug
permanently
22. What transfer is used to transfer specific requests to USB devices
Control Transfer
500 MA
Series A receptacle
hot plug
23. Two key functions of USB System Software: _______ - Bandwidth Allocation - or Transaction scheduling
initiates transfers
5.0 VDC voltage
Device Configuration
power contacts
24. List - in order - the color of each USB cable: red ____ green black
series B plug
USB Universal Host Controller
white
4
25. The Series B receptacle is attached to the ___________
twisted pair
device
known only
fireware descriptors
26. The USB cable must be shielded and _________ ______
twisted pair
system resources
Control Transfer
motherboard
27. Every transaction on the USB originates at the ____ ____
root hub
twisted pair
Control Transfer
3 ms
28. How many contacts does each connector have?
USB driver
4
hot plug
VCC
29. What was developed by and is licensed by Intel for USB 2.0?
3 ms
EHCI
Series A receptacle
USB Universal Host Controller
30. The Host Controller executes the frame lists at ___ intervals
USB host controller driver
Interrupt Transfer
no
1 ms
31. _____- data + data ground - List - in order - the purpose of each contact in a USB connector 1 - 2 - 3 - 4
Interrupt Transfer
memory buffer
5 meters
VCC
32. Under XP - USB activity can be monitored and controlled by using ______________
Series A receptacle
forwarded
4
device manager
33. What provides attachment points for USB devices?
root hub
hot plug
USB Universal Host Controller
series B plug
34. The USB cable must be shielded and _________ ______
twisted pair
host attachment and detachement
low cost
root hub
35. Device attachment is automatically detected - Software automatically configured - Device available for immediate use. This describes ______ _______ technology
hot plug
4
series B plug
host controller
36. 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
known only
power contacts
USB device endpoints
Interrupt Transfer
37. When the target device responds to a host initiated transaction - it must transmit a response ________
low cost
upstream
5.0 VDC voltage
interfaces services
38. USB registers are known as ____ _________ __________
USB device endpoints
retried
device drivers
host controller
39. USB system software consists of USBD and ___ _____ _________ ________
480 Mb/s
USB hot controller driver
series B plug
constant data rate
40. What conversion must happen before the data can be forwarded to root hub?
root port
parallel to serial
constant data rate
127
41. In basic USB Transaction - each transaction starts with a ______ ______
twisted pair
127
packet transmission
500 MA
42. Bus traffic arriving at the hub must be _________
forwarded
Enhanced Host Controller Interface
series B plug
Control Transfer
43. Device attachment is automatically detected - Software automatically configured - Device available for immediate use. This describes ______ _______ technology
hot plug
5.0 VDC voltage
device manager
4
44. What schedules USB transactions?
start of fram
egisters memory
USB host controller driver
single connector
45. _____- data + data ground - List - in order - the purpose of each contact in a USB connector 1 - 2 - 3 - 4
start of fram
initiates transfers
power ports recognizes status events
VCC
46. What contacts are longer on a USB connector?
hot plug
permanently
power contacts
low cost
47. The hub controller contains ___________ read by software that identify the device as a hub
device manager
fireware descriptors
white
4
48. Under XP - USB activity can be monitored and controlled by using ______________
error checking
12 Mb/s
device manager
Hardware & Software
49. Isochronous Transfer are used by applications that require a ______ _______ ______
series B plug
host controller
Basic USB Transaction
constant data rate
50. How many contacts does each connector have?
480 Mb/s
127
4
VCC