Computer science

Computer science

1. Fetch-execute cycle

2. binary

3. operating systems

   • manages the CPU - runs applications and executes and cancels processes
   • multi-tasks - allows multiple applications to run at the same time
   • managesmemory - transfers programs into and out of memory, allocates free space between programs, and keeps track of memory usage.
   • checks security (username and password)
   • gives an interface

4. CPU

   • components
     • Registers
     • cache memory
     • control unit
     • ALU

5. storage types

   • primary
     • volatile
     • fast
     • expensive per gigbyte
   • secondary
     • non-volatile
     • cheap per gigabyte
     • slow