高階ICT-SYST-015
A CPU has two cores. Which statement is the careful one?
A. Every program always runs exactly twice as fast.
B. Two cores mean the computer no longer needs RAM.
C. A core is a type of cable used only for printers.
D. Two cores can work on suitable tasks at the same time, but one single-threaded program does not automatically finish in half the time.✓ 答案
解說
Extra cores help when work can be split. A program that runs as one sequence still follows that sequence, so the speed-up is not automatic.