Not counting things that "damage" the brain (a blow to the head, drugs),
certain (strong) magnetic field can effect memory.
magic. and duct tape
1.Inbuilt memory is something thats inbuilt to the processor,meaning the processor can access it directly. 2.Then therez external memory that requires an input/output module to access it by the processor.In it: (a)Outboard storage:Now this type doesnt reqiure an external device to touch it directly(ex-magnetic disk) (b)Offline storage:This type requires an external device to touch it directly to access(ex-magnetic tape)
Secondary memory is often referred to as external memory because it is not directly accessible by the CPU and is typically located outside the primary storage (RAM). This type of memory includes devices like hard drives, solid-state drives, and USB drives, which store data persistently even when the power is off. Unlike primary memory, which is fast and temporary, secondary memory offers larger storage capacity and retains data long-term. Thus, it serves as an external repository for data and applications that the CPU can access as needed.
Depending on the PDA there are external memory storage which features an additional memory card that you are attached to the the PDA.
Yes, the CPU is directly addressable by the memory.
external fragmentation
yes
Internal memory on a computer is kept on the hard drive. The hard drive holds the memory for all things downloaded to the computer, and all web sites visited. External memory is usually kept on a device like a USB memory stick or a CD. External memory can be accessed by plugging it into the computer.
hardware
The major difference between main memory and auxiliary memory is that main memory is directly accessed by CPU but the auxiliary memory is not accessed by the CPU directly.For this the data is first transferred to main memory from auxiliary memory and then from main memory the data is transferred to the CPU for further processing. Some examples of auxiliary memory would be disks, external hard drives, USB drives, etc.
RAM
External fragmentation describes the situation where free memory blocks are scattered throughout the memory space, which can make it challenging to find contiguous blocks of memory for larger programs or data. This can slow down the memory allocation process and waste memory resources. Techniques such as compaction or paging are used to reduce external fragmentation and ensure efficient memory utilization.