William "Chops" Westfield schreef op 03-Jan-15 om 12:05 PM:

Making good multiple-choice questions is *very* hard. Been there, done=20
that (and I still do), got the scars to show.

> A recommended power supply may usually be replaced with one
> a) having the same voltage rating, but a higher current rating.
> b) having the same current rating, but a higher voltage rating.
> c) having the same power specification.
> d) having the same efficiency.

c can be read as "having the same voltage and current rating", which=20
would make it correct too. I suggest to add "(in Watts)"

>
> A recommended capacitor may usually be replaced with one having a
> a) higher voltage rating but the same capacitance.
> b) a higher capacitance but the same voltage rating.
> c) the same ripple current specification.
> d) the same technology (tantalum, ceramic, etc.)

I don't like this one, it leans too heavily on "usually".

>
> An interrupt request on a microprocessor is usually responded to
> a) within several instruction times
> b) within several microseconds
> c) within several milliseconds
> d) when the microprocessor is no longer busy

I guess you mean a to be correct, but this is rather=20
technology-dependent. I would not count b as wrong.

> Which is fastest in a microcontroller:
> a) register accesses
> b) cache memory accesses
> c) IO pin access
> d) SSD access

In a lot of uc's registers, memory and pins are equally fast...


> Which algorithm would be rated as "fastest":
> a) Constant
> b) linear
> c) N log N
> d) N^2

make that "fastest for large data sets", otherwise it is it is=20
undecidable (depends on the constant factor).

>
> Other than speed, the metric most often important in evaluating an algori=
thm is:
> a) memory consumption.
> b) code space.
> c) source code language.
> d) use of floating point operations.

Yuk! this depends *very* much on the area of application! I guess a=20
should be RAM consumption, or is it ambigu by design?


Wouter van Ooijen
--=20
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