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Compia A+ Core 1 (220-1001) > 03 - Hardware > Flashcards

03 - Hardware Flashcards

1
Q

Which of the following would be suitable for 1000-Mbps networks? (Select all that apply.)

A. Category 3
B. Category 5
C. Category 5e
D. Category 6

A

C,D

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2
Q

Which type of cable would you use if you were concerned about EMI?

A. Plenum-rated
B. UTP
C. STP
D. Coaxial

A

C

STP (shielded twisted pair) is the only cable listed here that can reduce electromagnetic interference.

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3
Q

You have been tasked with connecting a newer Android-based smartphone to an external TV so that you can display the CEO’s smartphone screen during a meeting. Which of the following adapters would be the best solution typically?

A. Micro-USB to HDMI  
B. Micro-USB to DVI  
C. USB-C to DVI
D. USB-C to Ethernet  
E. USB-C to HDMI
A

E

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4
Q

Which type of cable can connect a computer to another computer directly?

A. Straight-through  
B. Crossover  
C. 568A  
D. SATA  
E. 568B
A

B

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5
Q

Which connector is used for cable Internet?

A. LC  
B. F-connector  
C. BNC  
D. RJ45  
E. DE-9
A

B

Cable Internet connections use RG-6 coaxial cable (usually) with an F-connector on the end.

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6
Q

Which cable type would be suitable for longer distances such as connecting two cities?

A. Coaxial
B. Twisted pair
C. Multimode fiber
D. Single-mode fiber

A

D

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7
Q

What type of memory does a typical desktop computer use?

A

Desktops use dual-inline memory modules (DIMMs)

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8
Q

What type of memory does a typical laptop user?

A

Laptops use small-outline DIMMs (SODIMMs)

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9
Q

Specify the number of pins for each SODIMM module

DDR
DDR2
DDR3
DDR4

A

DDR 200-pin
DDR2 200-pin
DDR3 204-pin
DDR4 260-pin

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10
Q

Specify the number of pins for each DIMM module

DDR1
DDR2
DDR3
DDR4

A

DDR1 184-pin
DDR2 240-pin
DDR3 240-pin
DDR4 288-pin

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11
Q

Provide some names given to memory modules found in a computer.

A 
You may encounter the below names on the exam, they all mean the same thing
Stick, 
DIMM, 
Memory module 
Ram Sticks
DRAM
RAM
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12
Q

What is the transfer rate of DDR4-2133?

A. 17,066 MB/s
B. 19,200 MB/s
C. 21,333 MB/s
D. 25,600 MB/s

A

A. The transfer rate of DDR4-2133 is 17,066 MB/s.

It is also known as PC4-17000.

19,200 MB/s is the speed of DDR4-2400 (PC4-19200). 21,333 MB/s is the speed of DDR4-2666 (PC4-21333). 25,600 MB/s is the speed of DDR4-3200 (PC4-25600).

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13
Q

How many pins are on a DDR3 memory module?

A. 288
B. 184
C. 240
D. 200

A

C. DDR3 is a 240-pin architecture.

DDR Standard          Number of Pins
DDR1                         184 pins
DDR2                        240 pins
DDR3                        240 pins
DDR4                        288 pins
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14
Q

Which of the following allows for a 256-bit-wide bus?

A. ECC
B. Quad-channel
C. Parity
D. DDR2

A

B. The quad-channel memory architecture can allow for a 256-bit-wide bus (64-bit per channel). However, this will only be the case if all four channels have memory installed to them.
M1 64Bit + M2 64Bit + M3 64Bit + M4 64Bit = 256Bit
ECC stands for error correction code, which can detect and correct errors in RAM.

Parity is when the RAM stores an extra bit used for error detection.

DDR2 is a type of DRAM that, for the most part, was used in either single-channel or dual-channel environments.

A good explanation of quad-channel configuration
https://www.youtube.com/watch?v=ORwQL6dojXY

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15
Q

What are two types of hard drives?

A

Magnetic and solid state drives.

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16
Q

What is SATA

A

Serial AT Attachment, or Serial ATA.
Used to transfer data from hard and optical drives

7 pin data connector
15 pin power connector

17
Q

What are the two sizes of magnetic hard drives?

A

3.5 inch and 2.5 inch

  1. 5 inch are used for desktops and NAS
  2. 5 inch are found in laptops
18
Q

What is HDD?

A

Hard disk drive (magnetic disk drive, comes in 3.5 and 2.5 inch width)

19
Q

What are some properties that need to be observed when considering HDD?

A

Rotational speed, speeds range from 5,400 RPM to 15,000 RPM

Latency (How long the drive must wait before transferring data)

20
Q

What is SSD?

A

Solid-state drive.

No moving parts, data is placed on non-volatile microchips. Normally measuring 2.5 inch. Other SSDs can be in the form of an M.2-based SSD

M.2 cards may run at a higher temperature.

21
Q

How could a paper clip be used as a technologist?

A

May be used to eject CD’s

22
Q

How much data can an SATA Revision 3.0 drive transfer per second?

A. 50 MB/s  
B. 90 MB/s  
C. 1969 MB/s  
D. 6 Gb/s  
E. 16 Gb/s
A

D

SATA Revision 3.0 drives can transfer 6 Gb/s, which after encoding amounts to 600 MB/s. SATA Revision 3.2 is 16 Gb/s (1969 MB/s) but requires SATA Express or M.2. 50 MB/s is a typical write speed for Blu-ray discs and some flash media. 90 MB/s is a typical write speed for an SD card.

23
Q

Which level of RAID stripes data and parity across three or more disks?

A. RAID 0  
B. RAID 1  
C. RAID 5  
D. Striping  
E. RAID 10
A

C

RAID 5 stripes data and parity across three or more disks.

RAID 0 does not stripe parity; it stripes data only and can use two disks or more.
RAID 1 uses two disks only. Striping is another name for RAID 0. RAID 10 contains two sets of mirrored disks that are then striped.

24
Q

Which of the following has the largest potential for storage capacity?

A. CD-R
B. CD-RW
C. DVD-RW
D. Blu-ray

A

D

Blu-ray, at a typical maximum of 50 GB, has the largest storage capacity. CDs top out just under 1 GB. DVDs have a maximum of 17 GB.

25
Q

A customer complains that an important disc is stuck in the computer’s DVD-ROM drive. What should you recommend to the customer?

A. To get a screwdriver and disassemble the drive
B. To format the disc
C. To use a paper clip to eject the tray
D. To dispose of the drive and replace the media

A

C

26
Q

Which of the following best describes a specification for accessing storage while using PCI Express?

A. NVMe
B. 7200 RPM
C. Hot-swappable
D. 3.5-inch and 2.5-inch

A

A

Non-Volatile Memory Express (NVMe) is a specification for accessing storage while using PCI Express. Essentially, the M.2 slot on a motherboard taps into the PCI Express bus (×4) and uses a portion of the total bandwidth associated with that bus.

27
Q

What is the minimum number of drives necessary to implement RAID 5?

A. Two
B. Five
C. Three
D. Four

A

C

RAID 5 uses striping with parity, a third disk is needed. You can have more than three disks however.

28
Q

23 Which of the following RAID arrays is fault tolerant and allows you to do striping with parity?

A. Raid 0
B. Raid 1
C. Raid 5
D. Raid 10

A

C

RAID 5 is fault tolerant and allows for striping with parity, given you have three drives to dedicate to the array

29
Q

29 In a RAID 5 array of eight drives, how many can fail without losing the entire array?

A. Zero
B. One
C. Two
D. Five

A

B.

One hard drive can fail in a RAID 5 array, and the array can rebuild that drive’s data from the remaining drives. However, if a second drive fails, the array is toast. The reason is that the array requires the parity information from all the other drives.

30
Q

Which of the following disk arrays provide for fault tolerance (Select two best answers)

A. Spanned volume
B. RAID 0
C. RAID 1
D. RAID 5

A

C,D

31
Q
  1. A computer has a RAID 1 array. SATA Drive 0 failed, and now the computer will not boot. Which of the following steps would most likely fix the problem by allowing the computer to boot again?

A. Replace SATA Drive 1.
B. Mark SATA Drive 1 as active
C. Replace SATA Drive 0
D. Replace the array’s controller

A

B.

You would mark SATA Drive 1 as active. If you cannot access Disk Management, you would have to do it by booting the system with WinRE (System Recovery Options)

32
Q

What are the voltages supplied to an ATX motherboard by power supply?

A

Power supply requirements + 3.3 V, + 5 V, + 12 V, and -12 V outputs and +5 V standby output

33
Q

Which motherboard form factor measures 12 inches × 9.6 inches (305 mm × 244 mm)?

A. microATX
B. SATA
C. ATX
D. mITX

A

C

34
Q

Which component supplies power to the CMOS when the computer is off?

A. Lithium battery
B. POST
C. Power supply
D. BIOS

A

A

35
Q

To implement a secure boot process, which device should be listed first in the Boot Device Priority screen?

A. Network
B. CD-ROM
C. USB
D. Hard drive

A

D

36
Q

Which of the following connectors would you use to power a video card?

A. 24-pin power
B. 6-pin PCIe
C. Molex
D. 3.5-mm TRS

A

B

A video card is normally powered by a 6-pin or 8-pin PCIe connector. Lesser cards are simply powered by the PCIe bus.

37
Q

Which of the following is a chip that stores encryption keys?

A. Intel VT
B. Secure boot
C. Firmware
D. TPM

A

D

To perform hard drive encryption, some motherboards come with a Trusted Platform Module (TPM), a chip that stores encryption keys—it can be enabled in the BIOS.

Compia A+ Core 1 (220-1001) (11 decks)

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