1.3 Ram

Question 1

RAM

Answer 1

Random Access Memory

Question 2

ROM

Answer 2

Read Only Memory

Question 3

PROM

Answer 3

Programmable ROM; Write once

Question 4

EPROM

Answer 4

Erasable PROM; Write/Erase/Write again

Question 5

EEPROM

Answer 5

Electrically Erasable PROM; Flash and SSD

Question 6

SRAM

Answer 6

Static RAM
Very Fast
Very expensive
Physically larger
Often used in processor caches; L1, L2, L3

Question 7

DRAM

Answer 7

Dynamic RAM
Always refreshing
Random Access

Question 8

SDRAM

Answer 8

Synchronous DRAM

Synchronous with common system clock

Question 9

How many pins on SDRAM

Answer 9

168 Pins

Question 10

DDR RAM

Answer 10

Double Data Rate

Twice as fast as SDRAM; same clock speed

Question 11

How many pins on DDR RAM

Answer 11

184 Pins

Question 12

DDR-200 number of transfers per second

Answer 12

200 Million

Question 13

Throughput of DDR-200

Answer 13

1,600 MB/s; 200 x 8; PC1600

Question 14

DDR I/O Bus speed vs Memory speed

Answer 14

1:1

Question 15

DDR speed vs clock speed

Answer 15

2:1

Question 16

DDR speed vs Transfer Rate

Answer 16

1:8

Question 17

DDR2 vs DDR

Answer 17

Twice as fast

Not backwards compatible

Question 18

How many pins on DDR2 RAM

Answer 18

240

Question 19

DDR2 I/O Bus speed vs Memory speed

Answer 19

2:1

Question 20

DDR2 speed vs clock speed

Answer 20

2:1

Question 21

DDR2 speed vs Transfer Rate

Answer 21

1:8

Question 22

DDR3 vs DDR2

Answer 22

Twice as fast
Same clock rate
Larger capacities
Not backwards compatible

Question 23

How many pins on DDR3 RAM

Answer 23

240

Question 24

DDR3 I/O Bus speed vs Memory speed

Answer 24

4:1

Question 25

DDR3 speed vs clock speed

Answer 25

2:1

Question 26

DDR3 speed vs Transfer Rate

Answer 26

1:8

Question 27

SO-DIMM

Answer 27

Small Outline DIMM

Question 28

Used on critical computer system

Answer 28

Parity Memory

ECC

Question 29

Parity Memory

Answer 29

Adds additional party bit
Not always accurate
Does not correct

Question 30

ECC

Answer 30

Error Correcting Code
Detects and corrects on the fly
Not all systems use ECC

Question 31

How parity works

Answer 31

Makes byte even with extra bit

Question 32

Parity bit for 11100111

Answer 32

0

Question 33

Parity bit for 00000010

Answer 33

1

Question 34

Parity bit for 10011000

Answer 34

1

Question 35

Is parity correct

00000111 1

Answer 35

Yes

Question 36

Is parity correct

00000010 0

Answer 36

No

Question 37

Is parity correct

01100100 1

Answer 37

Yes

Question 38

Registered Memory

Answer 38

additional register between RAM and controller
Also known as “buffered” memory
Mostly used on servers

Question 39

Multi-channel memory

Answer 39

Install in pairs/trios
Should be exactly same modules
Often coloured differently

Question 40

Single-sided vs double-sided

Answer 40

Ranks; groups of memory on a module that can be independently accessed

Physically if chips on one side or both