MEMORY Flashcards
______ CONSISTS OF ELECTRONIC COMPONENTS
memory
What are the functions of that electronic data?
Store instructions waiting to be executed by the processor,
Store data needed by those instructions,
and the results of processing the data
What kind of basic category of items does emory store?
1.operating system software and other
system sftwares
2.Applications
software
3. Data being processed and the resulting information
What are the 2 kinds of memories contained by mobile or computer devices?
volatile:Loses its contents when power is turned off. Eg: RAM
non-volatile:Does not lose contents when power is removed
eg: ROM, flash memory and cmos
What are the 2 common types of RAM
SRAM - static ram
DRAM - dynamic ram
data is stored in ______ in DRAM
Capacitors
Why is DRAM dynamic?
DRAM is called dynamic as constant change or action i.e. refreshing is needed to keep the data intact.
What are the advantages and disadvantages of DRAM?
1.Advantage:Low costs of manufacturing and greater memory capacities.
Disadvantage:Slow access speed and high-power consumption
What are some common DRAM variations?
SDRAM,ddr, ddr2, ddr3, ddr4, RDRAM
What is SRAM constructed with?
transistors
SRAM is ______ in nature as it doe snot require any refreshing to keep data intact
static
SRAM is used in _____- memory
cache
RAM chips reside on ____
memory module
________ memory speeds up the processor of the computer because it stores frequently used instructions and data
cache
_______ memory stores info permanently
Read-only memory
The BOIS system is stored in te ______ memory
ROM
What program needs to be run first when booting a computer?
The BOIS as it loads the OS instruction into the RAM
HDD were first introduced in _____
1956 by IBM
what are the 3 generations of hard drive discs?
- PATA
- SATA
- SSD
_______ memory is a non-volatile type that can be erased and re-written electronically
Flash
Why has flash memory become relevant?
High-Speed Performance -
Flash memory provides faster data access and transfer speeds compared to HDDs
Durability and Reliability-
Flash memory has no moving parts, unlike HDDs, which are susceptible to mechanical failures
Low Power Consumption
Flash memory - consumes less power than HDDs because it does not require spinning disks or mechanical components to operate
Compact Size and Form Factor -
Flash memory chips are compact and lightweight
Silent Operation -
Flash memory operates silently, without the noise generated by spinning disks in HDDs.
Non-Volatile Nature -
Flash memory retains data even when power is removed
______ is the time taken by the processor to read from the memory
Access time
Access time is measured in _____
nanoseconds (one-billionth of a second)
In memory hierarchy what is the rule based on which memory is arranged in a hierarchy?
memory capacity is inversely proportional to memory speed
What is the memory hierarchy in terms of level or positios of each memory?
- cpu
- cache
- main mem
- secondary
- tertiary
What are tertiary storage devices?
largest in size and are present at level 4 and also the cheapest. (1-20tb)
a ____ allows internal devices and those attached to the system unit to communicate with each other
BUS
____ is the number of bits the processor can interpret and execute at any given time
Word size
