What is a Primary Storage Device ? Types of Primary Storage Device
- It’s a temporary storage.
- It consists of some chips.
- The data & instruction are resided in this memory when the CPU executing programs.
- This memory can capable to store & retrieved data very quickly.
- Primary memory is only the memory that is directly access to the CPU.
Types of Primary Storage Device :-
RAM –
- The complete name of RAM is random access memory which is also known as Primary memory.
- It is called read/write memory because data can be read as well as write in RAM.
- It is called random access because you can directly access any data from RAM if you know row & column cell.
- The RAM chip is fixed on the mother board & the mother board is designed in such a way that its memory
- capacity can be enhanced by adding more RAM chip.
- RAM is a VOLETILE memory.
- RAM chips are of two types:
DRAM:
- Dynamic Random Access Memory is a volatile memory that allows fast access todata and is ideal for use as the primary store of computer systems.
- However, the information is stored as electrical charges and the charges need tobe constantly refreshed in order for the data to be maintained.
SRAM:
- Static Random Access Memory is also a volatile memory.
- Once data is written into the chip, it is maintained as long as power is supplied toit; it does not need refreshing.
- However, SRAM is slower than DRAM and it is also more expensive.
ROM –
- The complete name of ROM is read only memory.
- The data stored permanently & can’t be altered by the programmer.
- Data stored in RAM chip can be read & used but cannot be changed.
- This memory also known a field storage permanent storage or dead storage.
- It is basically used to store manufacturer programmed & user program.
- Most of the basic operations are carried out by electronic circuits which are known as micro programs.
- These programs are stored in ROM. For ex. System Boot Loader.
- The complete name of ROM is read only memory.
- The data stored permanently & can’t be altered by the programmer.
- Data stored in RAM chip can be read & used but cannot be changed.
PROM –
- Programmable Read Only Memory is a non-volatile memory which allows the user to program the chip with a PROM writer.
- The chip can be programmed once, thereafter, it cannot be altered.
EPROM & EEPROM –
- Erasable Programmable Read Only Memory and Electrically Erasable Programmable Read Only Memory chips can be electrically programmed.
- Unlike ROM and PROM chips, EPROM chips can be erased and reprogrammed.
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Basic Computer Questions
Q : The main system board of the computer is called ____.
(A) Motherboard
(B) Processor
(C) Microchip
(D) None of these
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Q : Which of the following system components is the brain of a computer?
(A) Circuit board
(B) CPU
(C) Memory
(D) Network card
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Q : What is the built-in permanent memory in a computer called?
(A) RAM
(B) ROM
(C) CPU
(D) CD-ROM
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Q : Which of the following is the full form of NTFS?
(A) New Tree File system
(B) New Technology file system
(C) New Table file system
(D) Both B and C
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Q : Which of the following is not a hardware processing chip ?
(A) Processing chip
(B) printer
(C) mouse
(D) Java
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Q : The monitor of a computer is-
(A) storage device
(B) processing device
(C) input device
(D) output device
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Q : Which protocol does Ping use?
(A) TCP
(B) ARP
(C) ICMP
(D) BootP
(E) None of these
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Q : If you wish to extend the length of the network without having the signal degrade, you would use a ___.
(A) Gateway
(B) Router
(C) Modem
(D) Repeater
(E) Resonator
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Q : A series of instructions that tells a computer what to do and how to do it is called a ______.
(A) program
(B) command
(C) user response
(D) processor
(E) None of these
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Q : Verification of a login name and password is known as_____.
(A) Configuration
(B) Accessibility
(C) Authentication
(D) logging in
(E) None of these
Answer ⇒ ??