笔试题（architecture design）

architecture design
are two images,the first image has a person in front of ablackboard in a classroom and the second image has a person in front ofa lush two images are compressed using the jpeg algorithm.
first image will have larger file size.
second image will have a larger file size.
would you round a 10b number,x,at the 3rd(上角)bit?
a.(x>>2)<<2.
b.(x>>3)<<3.
c.((x+4)>>2)<<2
d.((x+4)>>2)<<3
e.((x+8)>>2)<<3
f.((x+8)>>3)<<3
happens if the number in 2 is negative?
A ignore
it absolute ,do the operation in 2,and add sign back
of the above
would you multiply a 4 in hardware?
4 adders each is offset from the provious adder by 1bit.
a booth multip;ier with 4b coefficient.
wires.
a barrel shifter.
is a fifo?what is a filo?which one is a queue? Which one is a stack?
is a queue and filo is a stack.
is the name of a dog. Filo is the name of a cat.
is a stack and filo is a queue.
would you design a barrel shifter?
multiple stages of 2乘2 multiplexers
a crossbar switch that can switch any inputs to any outputs
a clos network
muxes to switch between all combinations of hardwired shifts.