1.1 Systems Architecture

What is the purpose of the CPU?

• Process data and instructions

• Controls components of the computer

• Fetches and executes instructions

• Central Processing Unit

What is the name of the component that performs calculations and decisions?

• Central Processing Unit

• Arithmetic Logic Unit

• Accumulator

• Calculator

The program counter and accumulator are examples of what components of a CPU

• Buses

• Components

• Processors

• Registers

What is the purpose of the cache?

Select all correct answers

• Provides fast access to data and instructions

• Stores frequently used data and instructions

• Contains the address of the instruction being executed at the current time

• Means CPU needs to use RAM less

What functions does the control unit perform?

Choose two answers

• Decodes Instructions

• Performs arithmetic and logic operations

• Sends control signals to control how data moves round the CPU

• Contains the address of the next instruction to be executed

What is the purpose of the memory data register?

• Contains the address of the next instruction to be executed

• Holds data that is fetched from or written to memory

• Holds the current instruction being carried out

• Holds the memory location of data that needs to be accessed

Why is an embedded system a type of computer system?

• You can install software onto it

• It is a built in system that has a single purpose

• It is in a mechanical device

• It has takes an input, processes data and delivers an output

Explain the purpose of the program counter

• Counts programs

• Holds the address of the next instruction

• Allows a program to run

• Keeps count of the number of cycles

What factors affect the speed of a CPU?

Select multiple answers

• Size of Cache

• Number of Cores

• Clock Speed

• Size of RAM

Which are the first 3 registers used in the Fetch - Execute cycle?

• MDR then Acc then PC

• PC then MAR then MDR

• MAR then MDR then Acc

• PC then MAR then Acc