FUNDAMENTALS OF COMPUTER

COMPUTER HARDWARE COMPONENTS FUNCTIONS

COMPUTER MEMORY AND PROCESSING DEVICES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Out of these, Which is not an access mode?
A
Sequential
B
Random
C
Direct
D
Volatile
Explanation: 

Detailed explanation-1: -ROM is a Non-volatile memory. Whereas Volatile memory is the memory that can not be retrieved after having been power cycled.

Detailed explanation-2: -non-volatile memory include read-only memory (see ROM), flash memory, most types of magnetic computer storage devices (e.g. hard disks, floppy discs and magnetic tape), optical discs, and early computer storage methods such as paper tape and punched cards.

Detailed explanation-3: -ROM (Read-Only Memory) is nonvolatile: data stored in ROM maintains integrity after loss of power. A computer Basic Input Output System (BIOS) firmware is stored in ROM.

Detailed explanation-4: -Volatile Memory is used to store computer programs and data that CPU needs in real time and is erased once computer is switched off. RAM and Cache memory are volatile memory. Where as Non-volatile memory is static and remains in the computer even if computer is switched off. ROM and HDD are non-volatile memory.

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