Hi, I'm Raju, BCA Student, and in today's slide you will get the knowledge about memory and its types

1. Presentedby:
 Raju
 BCA-1st Year, Student
 Skills: Front-endWebDevelopment,Blogger
Memory and Its Types
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2. Memory:
 Memoryisthe most essential elementof a computing system
 Withoutitcomputer can’t performany tasks.
 Basically, memoryis used to store Data,Informationand Programs.
 Data, Informationand Programsthese arestored intheform of 0or 1bit
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3. Primary Memory: Secondary Memory:
i. Also knownasvolatilememory.
ii. It istemporarymemory.
iii. Data cannot store permanently in primary
memory.
iv. In primary memory contents lost when we
turnoffourComputer
v. Example:RAM(RandomAccessMemory)
i. Also knownasnon-volatilememory.
ii. It ispermanentmemory.
iii. Data cans be store permanently in
secondarymemory.
iv. Nodatalosein thecaseofpoweroff.
v. Example:MagneticDisk,OpticalDisk,etc.
Types of Memory:
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4.  Primary Memory:
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5. RAM
 Alsocalled asthe MainMemoryorthe PrimaryMemory.
 RAMstands for Random Access Memory
 The programs and data during execution of a program are stored in this
memory.
 Itisa volatilememoryas thedata loses whenthe power isturnedoff.
 RAM is further classified into two types- SRAM (Static Random Access
Memory)and DRAM(DynamicRandomAccess Memory).
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6. Types of RAM
SRAM
 StandforStaticRAM.
 It isfasterthantheDRAM.
 It is more expensive and more power
consuming.
 No require of refreshing and cannot store
manybitsperchip.
 Generatesmoreheat.
 Used formain cachememory.
DRAM
 StandforDynamicRAM.
 It isslowerthantheSRAM.
 It is cheapen than SRAM and less power
consuming.
 Required of refreshing and can store many
bitsperchip.
 Generateslessheat.
 Usedformain memory.
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7.  ROMstands for ReadOnly Memory.
 It is notvolatile.
 Always retainsits data.
 InROMa user cannot change instructions.
 Usedincalculators and peripheraldevices.
 ROMfurtherclassified into3 types: PROM,EPROM, and EEPROM.
ROM
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8. PROM
 Stand for Programmable Read
Only Memory.
 It can be programmed by the
user.
 In PROM instructions are
burned only once.
 Data and Instructions cannot
changed.
Types of ROM
EPROM
 Stand for Erasable
Programmable Read Only
Memory.
 EPROMcanbe reprogrammed.
 It can be erasedby exposure.
 Alsocalledultraviolet EPROM.
 To reprogram it, erase all the
previousdata.
EEPROM
 Stand for Electrically Erasable
Programmable Read Only
Memory.
 The data can be electrically
erased, then rewritten
electrically.
 No need of ultra violet light
whileerasing.
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9.  Secondary Memory
Types Secondary Memory
Sequential
Access
Magnetic
Disk
Optical
Disk
Flash
Memory
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10. Sequential Access
 Informationinthe fileisprocessed inorder,one recordaftertheother.
 Data can bereadsequentially.
 When we use write command, it will allocate memory and move the pointer to
theendof thefile
 Such a methodis reasonable fortape.
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11. Magnetic Disk
 A magnetic disk uses a magnetization process to read, write, rewrite and access
data.
 The Magnetic disk ismade ofa set ofcircular platters.
 The data in themagnetic diskis randomly accessed.
 Harddisks, zipdisks, arecommon examples ofmagnetic disks.
 The number of bitsstored on each track does not
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12. Optical Disk
 An optical disk uses optical storage techniques and technology to read and write
data.
 Inthe optical disk, the data issequentially accessed.
 Inoptical disk, optical (light)energyisused
 . Itstores data digitallyand uses laser beams toreadand writedata.
 Ituses the optical technology inwhich laser lightiscentred tothe spinning disks.
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13. Flash Memory
 It issometimes called flashRAM,and non-volatile types memory.
 It can be electricallyerasedandreprogrammed.
 It is usedto transferdata between PC &Digital device.
 Flashmemorybasically,found in USB flashdrives,MP3 Players.
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14. Thanks from Geeks Help
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