1.1.2 types of processor

Question 1

what is the difference between concurrent processing and parallel processing

Answer 1

parallel is pslitting up tasks between core and processing them simultaneously
concurrent processing is processing tasks seemingly at the same time
dedicate processor time to the tasks

Question 2

describe two limitations of parallel processing [4]

Answer 2

An algorithm must be suitable for parallel processing - unequal process time may mean some processors are unused.

more complex CU - more time spent managing the processes

potential deadlock - one process requires the output of another

Question 3

other than graphics give two examples where GPU is better than CPU

Answer 3

Machine learning - calculations need to be done on large dat sets
modelling calculations

Question 4

compare CISC and RISC [4]

Answer 4

CISC
has much more modes of addressing memory
Has much more instructions
multiple FDE cycles per instruction
RISC
1 to 1 relationship with instructions and FDE cycles
complex instructions can be made with multiple simple instructions
can do pipelining becuase all instructions are uniform

Question 5

what devices are RISC processors used

Answer 5

low power devices like phones
smart TV
Tablets

Question 6

Pros of RISC

Answer 6

RISC uses a reduced instruction set
so needs less complex hardware
So uses less power