CompTIA A+ Certification Exam 220-1101 Practice Test 12

Which of the following answers refer to the Double Data Rate 3 Synchronous Dynamic Random-Access Memory (DDR3 SDRAM)? (Select 3 answers)

What are the characteristic features of the Double Data Rate 4 Synchronous Dynamic Random-Access Memory (DDR4 SDRAM)? (Select 3 answers)

Which of the answers listed below refer to Double Data Rate 5 Synchronous Dynamic Random-Access Memory (DDR5 SDRAM)? (Select 3 answers)

Certain types of RAM take advantage of an additional bit in order to detect whether a data error has occurred. This extra bit is used to store information about the count of bits set to the value of 1 in a given string of data (typically one byte). Examining the value of the additional bit at different stages of processing allows to detect whether the data has been corrupted or not. What is the name of that extra bit?

ECC type RAM:

Compared to non-ECC memory, ECC RAM is a less expensive option and will always perform faster.

Which of the following characteristics apply to the type of RAM most commonly used as the main system memory in desktop PCs? (Select 2 answers)

The color-coded memory slots on the motherboard indicate that a given motherboard provides support for the multi-channel memory architecture.

Taking advantage of the performance benefits offered by the multi-channel memory architecture requires: (Select all that apply)

Platters of a magnetic hard drive spin at a rate measured in:

Which of the answers listed below refers to the maximum rpm value available in modern HDDs?

Which of the following answers refers to an HDD form factor for laptop computers?

Which of the answers listed below refers to magnetic drive form factor for desktops?

Which of the following answers refer to storage media device interfaces for SSDs? (Select 3 answers)

Peripheral Component Interconnect Express (abbr. as PCIe) is a high-speed, serial expansion bus designed as a replacement for PCI, PCI-X and AGP standards.

A logical device interface used for accessing non-volatile memory storage devices attached via PCIe is known as:

Which of the answers listed below refer to SSD form factors? (Select 2 answers)

An M.2 key is a notch on the pin contact surface of an M.2 expansion card which prevents its insertion to an incompatible socket. The 12 available M.2 key IDs are letters from A to M which indicate the location of notched pins on the card’s contact surface and designate the type of interface a given card is compatible with. M.2 expansion cards used for solid-state storage applications have key IDs of B and M. The B-keyed M.2 SSD cards take advantage of 2 lanes of a PCIe link (lower read/write speed), the M-keyed M.2 SSDs use 4 PCIe lanes (higher read/write speed). M.2 SSDs with 2 notches on the card’s pin contact surface (B + M) increase the card’s compatibility as they can be installed in any of the two types of expansion slots on the motherboard.

Which of the following answers refers to an older, portable device SSD form factor superseded by M.2?

Which of the RAID levels listed below does not offer fault tolerance?

Hardware RAID Level 0: (Select all that apply)

Hardware RAID Level 1: (Select all that apply)

Hardware RAID Level 5: (Select all that apply)

Which of the following answers refer(s) to (a) nested RAID level(s)? (Select all that apply)

Hardware RAID Level 10 requires a minimum of: