23-12-2017, 04:11 PM
PRIMARY MEMORY
*Memory which is also known as the main memory
Ans : Primary memory
*Primary memory is classified into RAM and ROM
*Which of the following memory needs periodic refresh ?
(a)SRAM
(b) DRAM
(c ) ROM
(d)All of the above
Ans : (b)
Interrupts
*An event external to the currently executing process that causes a change in the normal flow of instruction execution is called interrupts On getting an interrupt, CPU
(a)Finishes the current instruction and moves to interrupt service routine
(b)Immediately moves to interrupt service routine without completing current instruction
(c )Release the control on ILO lines and memory lines
(d)make the peripheral device, which requested the interrupt wait for fixed interval of time
Ans : (b)
RAM & ROM
*Memory which is usually termed as main memory of the system
Ans : RAM
*RAM is a volatile memory. Because it loses its data when computer is turned off.
*RAM is a temporary memory.
*RAM is located on the motherboard.
*ROM is a non - volatile memory because it doesn’t lose its data even after computer is turned off.
*We can’t change the data stored in ROM.
Types of RAM
*VRAM (Video RAM) - Special purpose 4 memory used by Video adapters to store image data for a computer display
*SGRAM (Synchronous Graphics RAM)- It is a clock synchronized RAM that is 4 used for Video Memory.
*MDRAM (Multibank Dynamic RAM). It is a high perfomance RAM that divides memory into multiple 32KB parts or banks that can be accessed individually.
*RDRAM (Rambus Dynamic RAM) - It is a video RAM.
*SDRAM is faster than regular DRAM because - it runs synchronously with the system clock
