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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 1 supports a speed of up to __________
500 MA
initiates transfers
1.5 Mb/s
start of fram
2. USB 2 supports a speed of up to __________
480 Mb/s
Hardware & Software
low cost
power ports recognizes status events
3. USB has no requirement for __________ _________
1.5 Mb/s
host attachment and detachement
system resources
usb driver
4. Isochronous Transfer are used by applications that require a ______ _______ ______
hot plug
twisted pair
Functional View
constant data rate
5. _____________ is the hub port connector while the Series A plug is attached to the cable
Series A receptacle
4
low cost
1.5 Mb/s
6. The maximum length of a USB cable is __________
white
Device Configuration
USB host controller driver
5 meters
7. _____ ___________ issue requests to the USB driver using I/O Request Packets (IRPs)
500 MA
device manager
4.8 Gb/s
device drivers
8. What are the USB system's two primary elements?
Hardware & Software
usb driver
memory buffer
single connector
9. If an error is found - it is forwarded to the _______ ___________
EHCI
packet transmission
start of fram
host controller
10. The ________________ is attached to the cable
VCC
series B plug
Device Configuration
fireware descriptors
11. How many contacts does each connector have?
USB hot controller driver
127
4
Functional View
12. In a Series A connector - one end of the cable is __________ attached to the device
start of fram
Functional View
permanently
power contacts
13. What conversion must happen before the data can be forwarded to root hub?
type transfer transaction traffic
parallel to serial
USB driver
127
14. In ther case of error - transactions are what?
5 meters
retried
USB device endpoints
4
15. USB standards define a __________ __________ type to attach any USB device to a PC
power ports recognizes status events
device manager
low cost
single connector
16. Each connected USB device is assigned an address ___________ ______ to the USB system
series B plug
power contacts
known only
1 ms
17. _____- data + data ground - List - in order - the purpose of each contact in a USB connector 1 - 2 - 3 - 4
VCC
5 meters
permanently
127
18. USB devices contain _________ - which is another word for ____________
5 meters
power contacts
egisters memory
480 Mb/s
19. HCD scheduling depends on ___ of transaction - ______ requirements of the device and _______ ______ of other USB devices
Transfers
upstream
type transfer transaction traffic
device
20. When writing to a USB device - the host controller reads data from the host _________ __________
memory buffer
white
127
egisters memory
21. List - in order - the color of each USB cable: red ____ green black
USB Universal Host Controller
series B plug
white
4
22. HCD initiates transaction using both _______ ____ and _____
power contacts
power contacts
USB device drivers
root hubs hubs
23. What was developed by and is licensed by Intel for USB 2.0?
device
EHCI
VCC
4
24. EHCI stands for
frame lists
Enhanced Host Controller Interface
Device Configuration
device
25. Each connected USB device is assigned an address ___________ ______ to the USB system
twisted pair
known only
device
USB Universal Host Controller
26. the USB driver provides __________ and ___________ for client software drivers
fireware descriptors
start of fram
interfaces services
3 ms
27. USB 3 supports a speed of up to __________
EHCI
USB Universal Host Controller
frame lists
4.8 Gb/s
28. USB 1.1 supports a speed of up to __________
EHCI
5 meters
low cost
12 Mb/s
29. How many volts does the USB cable supply?
white
twisted pair
5.0 VDC voltage
root port
30. In Bulk Transfers does a slow delivery result in lost or corrupted data?
no
USB device endpoints
Device Configuration
type transfer transaction traffic
31. Three operations Serial Bus Controllers using Device Manager under Windows will allow you to examine and /or control: _______ - USB Root Hub - USB Devices
controls
frame lists
12 Mb/s
USB Universal Host Controller
32. USB is a ____ _______ method of adding peripherals to PC's
5.0 VDC voltage
motherboard
USB device drivers
low cost
33. Under XP - USB activity can be monitored and controlled by using ______________
EHCI
host attachment and detachement
device manager
low cost
34. USB devices enter a "suspend" state after ______________ of no bus activity
3 ms
root hub
VCC
USB device endpoints
35. What contacts are longer on a USB connector?
device
hot plug
Series A receptacle
power contacts
36. The Host Controller executes the frame lists at ___ intervals
1 ms
constant data rate
power contacts
500 MA
37. What contacts are longer on a USB connector?
fireware descriptors
power contacts
power ports recognizes status events
3 ms
38. How many volts does the USB cable supply?
5.0 VDC voltage
USB host controller driver
root port
power ports recognizes status events
39. USB system software consists of USBD and ___ _____ _________ ________
error checking
Control Transfer
USB hot controller driver
127
40. USB registers are indirectly accessed by ___ _____ ________
USB device drivers
start of fram
4
VCC
41. 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
Interrupt Transfer
Enhanced Host Controller Interface
5.0 VDC voltage
Enhanced Host Controller Interface
42. USB 1.1 supports a speed of up to __________
constant data rate
127
controller repeater
12 Mb/s
43. USB is a ____ _______ method of adding peripherals to PC's
5.0 VDC voltage
127
low cost
device drivers
44. _____- data + data ground - List - in order - the purpose of each contact in a USB connector 1 - 2 - 3 - 4
VCC
memory buffer
upstream
12 Mb/s
45. The hub controller _________ the powering and enabling of ports
Series A receptacle
Enhanced Host Controller Interface
controls
known only
46. USB standards define a __________ __________ type to attach any USB device to a PC
5 meters
constant data rate
low cost
single connector
47. The HCD schedules transactions by building a series of transaction lists called ________ _________
low cost
hot plug
frame lists
127
48. The ________________ is attached to the cable
hot plug
known only
host attachment and detachement
series B plug
49. The maximum current a USB cable will deliver is _________
500 MA
1.5 Mb/s
4
series B plug
50. What contacts are longer on a USB connector?
system resources
permanently
twisted pair
power contacts