Section 4 - Computer Systems Flashcards
What are the 3 logic gates?
And, or, not
What is software?
Software is any program that runs on the compute
What is hardware?
Hardware is any physical component that makes up the computer
What are the 2 main categories in software?
System software and application software
What is Von Neumann architecture?
A program is stored in main memory and instructions are fetched and executed sequentially,
What is within the cpu?
Arithmetic logic unit, control unit, clock and bus
What does the arithmetic logic unit do?
It carries out the following functions
- logical operations
- shift operations
- arithmetic operation
What does the control unit do?
It does the following:
- it controls the execution of instructions in the correct sequence
- it decoded instructions
- it regulates and controls processor timing using regular pulses from the system clock
- it sends and receives control signals to and from other devices within the computer
What does the clock do?
The system clock controls processor timing, it synchronises all cpu operations
What does the bus do?
The buses pass data between the different components of the cpu
What is the fetch execute cycle?
Fetch an instruction from main memory \/
What is random access memory?
RAM is used to hold programs currently being executed, and the data the programs are using. This is temporary storage
What is read only memory? (ROM)
You cannot write over the contents once it has been created however it is permanent storage
What is cloud storage?
Saving data to an off site storage system maintained by a third party
