We can use the SIM Application Toolkit (STK) to both read and write to a SIM.
read: moving data from file to memory write: moving data from memory to file
Optical media.
please read data structure (schaum series) books
Pick one: ROM, PROM, EPROM write-protected magnetic disk/tape, CD-ROM, DVD-R write-protected partition/file, other user's or sysadmin's file code-segment, read-only data-segment, other user's or kernel's code- or data-segment
error reading
The read and write control lines running through the data buses have control signals. The microprocessor can read data from memory or write data to the memory so the data buses are bidirectional. One direction is needed to write the data while another direction is required for the read command to fetch the data.
read: moving data from file to memory write: moving data from memory to file
how can study of programming methods to read data from / write data to a USB port
So that the processor can both read and write data.
Read/write pad
Files that can only be read (data can be retirieved) are called read-only files. You cannot write any data into a read-only file (you cannot edit it).
No, it will not. For sim cards you have to have special reader which is of the same form factor, and has appropriate voltages in order to read/write information.
optical media
No. A sim card holds data for its self. On the other hand wi-fi holds data for its self. Meaning excess fees of a sim cards data is not possible unless the sim card is in the phone, ipad, tablet etc..
read, write
Read/Write Heads
since data can be read /write from/to the microprocessor, hence data bus is bidirectional. if data is required read from microprocessor then it will be pointing to a memory location by the address bus, by indicating which location data its required to read. similarly to write a data to a location, again the microprocessor will be to that particular location by holding that address in address bus. hence it will be unidirectional.