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Worksheets1.1 System architecture revision
Total questions: 10
Worksheet time: 6mins
Which component performs calculations and decisions?
Control Unit
Program Counter
Accumulator
Arithmetic Logic Unit
The program counter and accumulator are examples of what components of a CPU?
Buses
Registers
Cache
Switches
Describe the purpose of the cache.
Provides quick access to frequently used instructions
Store the operating system
Stores application programs
Stores electricity
State two functions of the control unit in a CPU
Stores frequently used instructions
Carries out calculations
Decodes instructions
Send signals to control the flow of data
Describe the purpose of the memory data register (MDR)
Sends addresses to memory
Holds data that is to be written to memory
Holds data fetched from memory
Controls data flow
State an example of an embedded system and explain why it is a computer.
Washing machine
Shower
Laptop
Heating system
What is the purpose of the program counter?
Holds the numbers for a calculation
Holds the address of the next instruction
Counts how may times a program is run
Stores the data to be decoded
State three factors that affect the speed of a CPU.
Number of cores
Cache size
Size of hard drive
Clock speed
A Von Neumann computer does what cycle?
Fetch decode execute
Fetch run produce
Grab run execute
Grab decode run
Purpose of the CPU
Fetch instructions
Decode instructions
Execute instructions
Grab something form the computer
