what is secondary storage?
storage devices which store data when the computer is not in use
what does volatile mean?
currently held data is lost when the power is switched off
what are some properties of primary storage?
all volatile with the exception of ROM, very fast access speeds, the CPU can access primary storage much faster than secondary can
why is secondary storage needed?
to store data when the computer is off
what is the media?
what storage type the device is stored on
where does the computer store data when it is turned off and why?
the hard drive as it is non-volatile and read and write so it can be changed when the computer is switched back on.
what is the drive?
the device that reads and writes data
what does non-volatile mean?
currently held data is saved when the power is switched off
what are processors?
CPUs
what is primary storage ?
the immediate memory that the processors have access to.
Name 3 solid State storage devices.
solid state drive, USB sticks, SD cards
Name 3 magnetic storage devices.
HDD, floppy disk, magnetic tape
Name 3 optical storage devices.
DVD, CD, Blu-ray
What is the definition of Character sets?
collections of characters that a computer recognises from binary representation
What is the difference between ASCII and Extended ASCII?
ASCII holds 7 bit values whereas Extended ASCII holds 8 bit values
What is the difference between ASCII and Unicode?
ASCII covers the character set of all English letters and symbols and stores 7 bit values, whereas Unicode covers every symbol from major languages and stores 16 bit values
