Computer Organisation and Architecture (AQA A-Level)

Select two internal computer hardware components

• Address, control and data bus

• I/O controllers

• USB ports

• The user interface

Current day processors function using three main operations. In order they are

• Fetch, decode and execute

• Execute, fetch and decode

• Clear, Fetch and execute

• Fetch, assemble and execute

The processor is connected to the main memory and other internal computer components. They are the

• Address, Data and control buses

• Address, input and control buses

• Address, Data and output buses

• Input, output and control buses

The address bus is

• Uni-directional and controlled by the CPU

• Bi-directional and controlled by the CPU

• Uni-directional and controlled by the memory

• Uni-directional and controlled by the memory

The data bus is

• A bi-directional path between internal components

• A uni-directional path between internal components

• A tri-directional path between internal components

• A bi-directional buffer between internal components

If a bus has 24 lines, it has an addressable range (or maximum number of addressable cells) of

• ~16.7M

• ~65.5K

• ~17.6M

• ~4.3B

What is the purpose of the I/O controller in the computer?

• provides the connection between external devices to the processor (via the data bus)

• provides the connection between internal devices to the processor (via the data bus)

• provides the barrier between external devices to the processor (via the control bus)

• provides the connection between the internal memory and the processor (via the address bus)

The von Neumann architecture stores data and program code in the same internal memory. There is another architecture that stores data and program code in separate memories. What is this architecture called?

• Harvard

• Hartford

• Hacienda

• Haiku

The mathematical calculation component internal to the processor is called the

• Arithmetic Logic Unit

• Calculator

• Arithmetic Calculus Module

• Mathematical Logic System

The system clock provides

• the frequency of the CPU operations

• the time of day

• the speed the ???

• ???