AQA A Level Computer Science - 4.7 Fundamentals of Computer Organization and Architecture Questions with Correct Answers

Embedded computer system Correct Answer A dedicated computer system with a limited or non-existent user interface and designed to operate completely, or largely, autonomously from within other machinery. Hardware Correct Answer The physical part of the computer system Software Correct Answer The set of instructions which make the computer system do something useful Input Device Correct Answer A piece of hardware that allows data to be transmitted to the CPU Output Device Correct Answer A piece of hardware that translates signals from the computer into a human-readable form or into a form suitable for re-processing by the computer at a later stage Storage Device Correct Answer A piece of hardware which can store data outside the processor in a form which is suitable for input back in to the processor Peripheral Device Correct Answer A piece of hardware which is can be connected to the central processing unit. Control Unit Correct Answer The Control Unit has 3 main jobs:Fetch-Decode-Execute cycle, Synchronises the system using the inbuilt clock, sends controls signals to other parts of the processor to manage execution Memory Unit Correct Answer Where everything the processor is going to use is stored. Stores all data currently in use - Program instructions ,Data needed to carry out instructions, Parts of the OS ALU Correct Answer The Arithmetic and Logic Unit, Arithmetic operations ,Logical decisions , Acts as a gateway t