問題詳情
2 電腦系統內的程序（process），會處於三種不同狀態（state）：準備（ready）、正在執行（running） 及等候（waiting）。程序的狀態會在三種不同狀態之間變換，請問下列那一個狀態的變換是不可能 發生的？
(A)從正在執行狀態，變換到準備狀態
(B)從準備狀態，變換到等候狀態
(C)從等候狀態，變換到準備狀態
(D)從正在執行狀態，變換到等候狀態
(A)從正在執行狀態，變換到準備狀態
(B)從準備狀態，變換到等候狀態
(C)從等候狀態，變換到準備狀態
(D)從正在執行狀態，變換到等候狀態
參考答案
無參考答案
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