an instance of a class.

6.

6.

a)

Emulators

An emulator is an application that emulates real
mobile device software, hardware and operating
systems, allowing us to test and debug our
applications.

Emulator ‏کا‎ usually provided by device
manufacturer.

Emulators are written in machine-level assembly
languages.

Emulators are more suitable for debugging.

Often an emulator comes as a complete re-
implementation of the original software ,

C) MEMORY DEVICES

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Simulators

A simulator is a less complex application that simulates
internal behavior of a device, but does not emulate
hardware and does not work over the real operating
system,

A simulator may be created by the device manufacturer
01 by some other company.

Simulators are written in high level languages,
Simulators can be difficult for debugging purpose.

Simulator is just a partial re-implementation of the
Original software .

SRAM, DRAM, EEPROM, FLASH, Cache Memory, Virtual Memory Static RAM
(SRAM)

The word static indicates that the memory retains its contents as long as power is being

supplied. However, data is lost when the power gets down due to volatile nature.

SRAM chips use a matrix of 6-transistors and no capacitors. Transistors do not require

power to prevent leakage, so SRAM need not have to be refreshed on a regular basis

and require less power.

Because of the extra space in the matrix, SRAM uses more chips than DRAM for the

same amount of storage space, thus making the manufacturing costs higher. SoSRAM

is used as cache memory and has very fast access.