Module 3

Question 1

Virtual memory

Answer 1

If there is not enough system RAM, the memory space can be extended using disk storage

This is swap space

Total amount of addressable memory (system RAm plus swap space) is referred to as virtual memory/RAM

Question 2

What is virtual memory

Answer 2

Area on hard disk which can hold pages of memory

Question 3

Data and programs can only be used when moved to RAM

Question 4

RAM types

Answer 4

DRAM

SDRAM

DDR SDRAM

Question 5

DRAM

Answer 5

Needs constant refreshing
Without refreshing, the data in memory disappears

Question 6

SDRAM

Answer 6

Older technology
Synchronised to system clock

Question 7

DDR SDRAM
Double data rate

Question 8

How many bits its in a byte

Answer 8

8

Question 9

DDR 3 maximum size

Answer 9

16 GBs

Question 10

DDR 4 maximum size

Answer 10

64 GBs

Question 11

DDR 5

Answer 11

128 GBs

Question 12

Memory module

Answer 12

A printed circuit board that holds a group of memory chips that act as a single unit

Question 13

DIMM

Answer 13

Packaging for system memory
Different pin configurations for different RAM types

Question 14

Where are memory modules located

Answer 14

In slots on motherboard

Question 15

Are memory modules removable and replaceable

Answer 15

Yes

Question 16

No of pins on DDR3

Answer 16

240

Question 17

No of pins on DDR4

Answer 17

288

Question 18

SODIMM

Answer 18

Memory that is Half the size of DIMMS
Comes ion 32- or 64-bit data paths
Found in laptops/imac

Laptop RAM

Question 19

Single channel memory

Answer 19

Memory with one 64-bit bus between the CPU and RAM

Question 20

Dual channel memory

Answer 20

Memory controller with 2 pathways to CPU- 128-bits of data transferred

Remember the motherboard has to be able to support dual,triple etc

Question 21

For dual, triple, quad channels to work

Answer 21

Motherboard and DIMM must support the technology

Motherboard manufacturer colour-codes DIMM slots to shown you how to configure channeling

Question 22

Setting up dual channeling

Answer 22

Pair of DIMMS in a channel must be equally matched din size speed ad features

Use same manufacturer ( recommended)

Question 23

Setting up triple channeling

Answer 23

3 DIMMS populated with 3 matching DDR3 DIMMS

Question 24

Which DDRs DIMMS can use dual channel

Answer 24

ALL DIMMS

Question 25

Which DIMMS can use triple channel

Answer 25

ONLY DDR3

Question 26

Which DIMMS can use quad channels

Answer 26

DDR 3, 4 and 5

Question 27

Memory compatibility issues

Answer 27

DIMM format must match the motherboard Most vendors recommend installing the largest module inn the lowest numbered slot Modules from different vendors can be mixed-could cause problems For best performance modules should be the same speed Different speeds can be mixed but lowest speed will be used

Question 28

Why is synchronous DRAM so-called

Answer 28

Works at the same speed as the motherboard

Question 29

Configuring a system with dual channel memory. 2 modules and 4 slots. Which slots do you use?

Answer 29

Check system guide

Question 30

How is laptop system memory packages

Answer 30

SODIMM

Question 31

Additional memory was installed in a user’s system, now it won’t reboot. What should you do

Answer 31

Verify correct memory type was installed on the system and in the correct configuration Check that the new memory module is seated properly in its slot. Try swapping memory around in the memory slots.