It depends on the serial bit rate versus the parallel strobe cycle time but, in general, a parallel interface is faster than a serial interface. However, modern USB, Firewire, and SATA interfaces are very fast, and might be considered faster.
Parallel port
At a time one or more data can be transfered though parallel ports
No, bluetooth is a serial interface.
cheaper because of fewer wires and other parts needed.
parallel port if you want to know why go to it140 if you know what that is.
It is less costly to design ever faster serial lines than to create and build the necessary circuitry to keep faster parallel channels properly aligned. This is why Parallel ATA and Parallel SCSI have migrated to Serial ATA (SATA) and Serial SCSI (SAS).
external serial ATA is six times faster
yes
The RS 232 interface is one of the standards used in serial communications. It uses serial signals (as opposed to parallel) to connect computers to devices like printers and modems.
Parallel data transmission is faster compared to serial data transmission. The speed of a parallel link is equal to the number of bits sent multiplied by the bit rate of each individual path.
A CD drive can interface with a mother board using an EIDE, SATA or SCSI interface.
The functions of an interface is to connect two different items together and make them work. The most common interfaces are Parallel, Serial, USB, Infrared and PS/2.
It means an 8 bit parallel I/O interface, as opposed to 8251 which is a serial I/O.
External serial ATA known as eSATA is up to six times faster than USB or Firewire.