$($a$)$ Write down the logic expression $P=f(A,B,C)$ corresponding to the following

truth table $($simplification of logical expression is not required$)$: $[3]$

$($b$)$ Peter has a laptop computer with $4$GB memory, $64$GB SSD$.$ The laptop is stan$-$

dalone, and there is no network connection. Today, when Peter is working on his

assignment, he found that the LED of the SSD was flashing all the time, and the

system is running very slowly. Explain what is happening in his laptop, why it

is running slowly, and what remedial action can be done. $[4]$

$($c$)$ Consider two processors, codenamed IA$8$ and XT$5.$ IA$8$ runs at $2GHz$ clock rate

while XT$5$ runs at $800MHz.$ Which one is faster? Explain your answer.

$($d$)$ A system uses paging for memory management. Describe briefly how memory

protection is done.

A subscript out of bound error is when an array of size $n$ is declared, int a $[$n$],$

and the element accessed is outside the valid range, such as a $n+1.$ Explain

why sometimes, subscript out of bound error results in Segmentation Fault $($or

memory protection violation$),$ and sometimes not.

$($e$)$ Solid State Drives $($SSD$,$ using flash memory$)$ is becoming more popular to be

used as secondary storage. Suggest two advantages when compared with hard

drives. $[2]$