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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 ________________ is attached to the cable
white
low cost
series B plug
4
2. The Series B receptacle is attached to the ___________
device
controller repeater
series B plug
USB Universal Host Controller
3. _____________ is the hub port connector while the Series A plug is attached to the cable
Series A receptacle
4
memory buffer
read transaction
4. The Host Controller executes the frame lists at ___ intervals
device manager
egisters memory
1 ms
device manager
5. USB standards define a __________ __________ type to attach any USB device to a PC
Basic USB Transaction
USB device drivers
controls
single connector
6. List - in order - the color of each USB cable: red ____ green black
white
5 meters
host attachment and detachement
device manager
7. USB registers are indirectly accessed by ___ _____ ________
frame lists
127
white
USB device drivers
8. _____________ is the hub port connector while the Series A plug is attached to the cable
forwarded
low cost
Series A receptacle
device
9. How many contacts does each connector have?
series B plug
permanently
permanently
4
10. the IRP ______ ________ to or from a target USB device
usb driver
initiates transfers
USB hot controller driver
single connector
11. The maximum length of a USB cable is __________
USB device drivers
constant data rate
5 meters
1 ms
12. Device attachment is automatically detected - Software automatically configured - Device available for immediate use. This describes ______ _______ technology
upstream
twisted pair
read transaction
hot plug
13. The HCD schedules transactions by building a series of transaction lists called ________ _________
white
host controller
frame lists
USB driver
14. USB 3 supports a speed of up to __________
white
5.0 VDC voltage
Control Transfer
4.8 Gb/s
15. Each connected USB device is assigned an address ___________ ______ to the USB system
480 Mb/s
root hub
retried
known only
16. Three operations Serial Bus Controllers using Device Manager under Windows will allow you to examine and /or control: _______ - USB Root Hub - USB Devices
single connector
twisted pair
5 meters
USB Universal Host Controller
17. USB has no requirement for __________ _________
controls
system resources
host attachment and detachement
500 MA
18. Bus traffic arriving at the hub must be _________
power contacts
Interrupt Transfer
hot plug
forwarded
19. SOF stands for ________ __________ __________-
interfaces services
start of fram
power contacts
device
20. _____ ___________ issue requests to the USB driver using I/O Request Packets (IRPs)
single connector
Interrupt Transfer
permanently
device drivers
21. HCD initiates transaction using both _______ ____ and _____
twisted pair
12 Mb/s
low cost
root hubs hubs
22. The maximum length of a USB cable is __________
low cost
480 Mb/s
5 meters
system resources
23. EHCI stands for
root hubs hubs
Enhanced Host Controller Interface
series B plug
12 Mb/s
24. The characteristics of an USB device are detected by the _____ ______ during device configuration
USB driver
power contacts
127
3 ms
25. USB is a ____ _______ method of adding peripherals to PC's
low cost
device manager
1 ms
controller repeater
26. What was developed by and is licensed by Intel for USB 2.0?
permanently
single connector
device manager
EHCI
27. EHCI stands for
Interrupt Transfer
low cost
Enhanced Host Controller Interface
5 meters
28. Isochronous Transfer are used by applications that require a ______ _______ ______
white
4
hot plug
constant data rate
29. 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
4
permanently
frame lists
Interrupt Transfer
30. The root hub is located on the ___________
Transfers
Basic USB Transaction
motherboard
egisters memory
31. USB devices contain _________ - which is another word for ____________
egisters memory
1 ms
Basic USB Transaction
root hubs hubs
32. Up to ___ devices can be attached to single USB port
system resources
127
interfaces services
Enhanced Host Controller Interface
33. The USB cable must be shielded and _________ ______
USB driver
USB device drivers
twisted pair
motherboard
34. USB devices enter a "suspend" state after ______________ of no bus activity
Series A receptacle
3 ms
127
series B plug
35. In ther case of error - transactions are what?
retried
VCC
4.8 Gb/s
5.0 VDC voltage
36. USB 2 supports a speed of up to __________
5 meters
480 Mb/s
Interrupt Transfer
permanently
37. USBD stands for?
Series A receptacle
host controller
usb driver
1.5 Mb/s
38. A root hub consists of a hub _________ and hub __________
hot plug
4
Enhanced Host Controller Interface
controller repeater
39. Two key functions of USB System Software: _______ - Bandwidth Allocation - or Transaction scheduling
known only
12 Mb/s
power contacts
Device Configuration
40. The USB cable must be shielded and _________ ______
twisted pair
device
motherboard
type transfer transaction traffic
41. The hub controller _________ the powering and enabling of ports
controls
white
12 Mb/s
USB host controller driver
42. In a Series A connector - one end of the cable is __________ attached to the device
permanently
USB device drivers
Functional View
1 ms
43. USB 2 supports a speed of up to __________
device manager
VCC
480 Mb/s
forwarded
44. USB root hub and the target devices perform __________ ___________ during each transaction
low cost
error checking
4
Enhanced Host Controller Interface
45. USB registers are known as ____ _________ __________
root hub
single connector
device
USB device endpoints
46. _____- data + data ground - List - in order - the purpose of each contact in a USB connector 1 - 2 - 3 - 4
VCC
500 MA
127
upstream
47. Transaction instructions generated by the ____ ____________ are forwarded to the root hub
host controller
constant data rate
read transaction
system resources
48. What was developed by and is licensed by Intel for USB 2.0?
system resources
white
USB device drivers
EHCI
49. USB registers are indirectly accessed by ___ _____ ________
permanently
read transaction
1.5 Mb/s
USB device drivers
50. Bulk - Isochronous - Interrupt - and Control are types of what?
Transfers
USB device drivers
device
480 Mb/s