a: Right. 2^(k+1) block size for (2^k)+1 allocation request
b: wrong.
c: wrong. LIFO is also fast.
d: wrong. almost every strategy has external fragmentation problem.
a: wrong. first fit should be fast in this condition
b: wrong. should be order by block size
c: wrong. min spare size not max
d: Right.
b
ref 9.10.3