$[33]$

Explain the four principal approaches to multithreading?

$1\mathrm{.}2$ Describe the two protocols used to track the status of the shared data block and how.

the status is maintained in both schemes.

$1\mathrm{.}3\mathrm{.}1$ Explain the concept of RISC.

$(10)$

$1\mathrm{.}3\mathrm{.}2$ What are some typical characteristics of a RISC inter $(6)$

$(5)$