801 Test Prep

Question 1

What is RAID 0?

Answer 1

Disk Striping: Disk Striping requires at least 2 drives. It does not provide redundancy to data. If any one drive fails, all data is lost.

Question 2

What is RAID 1?

Answer 2

Disk Mirroring/Duplexing: Requires at least 2 drives, although they can run with any even number of drives. Ultimate in safely, but you lose storage space because the data is duplicated; you need 2 100GB drives to store 100GB of data.

Question 3

What is RAID 2?

Answer 3

Disk striping with multiple parity drives: Weird RAID idea that was never used. Ignore it.

Question 4

What is RAID 3 and 4?

Answer 4

Disk striping with dedicated parity drives: Combined dedicated data drives with dedicated parity drives. The differences between the 2 are trivial. Unlike RAID 2, these did see some use in the real world but were quickly replaced by RAID 5.

Question 5

What is RAID 5?

Answer 5

Disk striping with distributed parity: Instead of dedicated data and parity drives, it distributes data and parity information evenly across all drives. This is the fastest way to provide data redundancy. 5 is by far the most common RAID implementation and requires 3 drives. 5 arrays effectively use one drives worth of space for parity. If you have 3 200GB drives, you have a total of 400GB of space.

Question 6

What is RAID 6?

Answer 6

Disk striping with extra parity: If you lose a drive in a RAID 5 array, your data is at great risk until you replace the bad drive and rebuild the array. RAID 6 is RAID 5 with extra parity information. RAID 6 needs at least 5 drives, but in exchange you can lose up to 2 drives at one time.

Question 7

What are the 3 battery types used in portable PCs?

Answer 7

Ni-Cd: Nickel Cadmium
Ni-MH: Nickel-Metal Hydride
Li-Ion: Lithium-Ion (most popular)

Question 8

What are the minimum requirements for Windows XP?

Answer 8

CPU: Any Intel or AMD 233Ghz or more
RAM: 64MB
HD: 1.5GB of free space
Display: Video that supports SVGA with at least 800X600 resolution
Optical Drive: Any CD or DVD drive

Question 9

What are the minimum requirements for Windows Vista?

Answer 9

CPU: 1GHz
RAM: 512MB for Home Basic, 1GB for all others
HD: 20GB HD w/15GB free for Home Basic, 40GB HD w/15GB free for all others
Network: Any modern NIC
Display: Support for DirectX 9 and 32MB of video memory for Home Basic, 128MB of memory, 2.0 pixel shader support, the WDDM driver, and 32 bits per pixel for all other versions
Optical Drive: Any DVD drive

Question 10

What are the minimum requirements for Windows 7?

Answer 10

CPU: 1GHz
RAM: 1GB for 32-bit and 2GB for 64-bit
HD: 16GB for 32-bit and 20GB for 64-bit
Display: DirectX 9 support and WDDM 1.0 driver support

Question 11

What IP range is Class A?

Answer 11

Starts with 1-126
129 network addresses available
16,777,214 host nodes supported
Uses first octet to identify the network address and the next 3 for the host

Question 12

What IP range is Class B?

Answer 12

Starts with 128-191
16,384 network addresses available
65,534 host nodes supported
Uses the first 2 octet a to identify the network address and the last 2 for the host.

Question 13

What IP range is Class C?

Answer 13

Starts with 192-223
2,097,152 network addresses available
254 host nodes supported
Uses the first 3 octets to identify the network address and the last one for the host

Question 14

What are USBs transfer speeds?

Answer 14

1.5/12/480Mbps

5Gbps

Question 15

What are FireWire’s transfer speeds?

Answer 15

a is 400/Mbps

b is 800/Mbps

Question 16

How many pins does DDR, 2 and 3 RAM have?

Answer 16

DDR - 184 pins (200 or 172 for laptops)

DDR2 and 3 - 240 pins