bulkmail,
i've taken CCNA, BSCI. there is a conversion question. you might get it depends on one's luck. conversion is simple however.
for example if i have a hex number of 9F
since each hex symbol represents 4 bits of binary data
hex 9
bin 1001
hex F
bin 1111
so simply combine them
hex 9F
bin 10011111
if i need to convert that into decimal (base 10), it requires little more time, though not too much.
dec 128 64 32 16 8 4 2 1
bin 1 0 0 1 1 1 1 1
dec = 128 + 16 + 8 + 4 + 2 + 1 = 159
if you already know this please disregard.
this is simplest way that i know to explain conversion.