6The construct cobegin Statement1; Statement2; coend means Statement1 and Statement2 are to be executed in parallel. The only tw

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问题 6The construct cobegin Statement1; Statement2; coend means Statement1 and Statement2 are to be executed in parallel. The only two atomic actions in this construct are loading thevalue of a variable and storing into a variablE.For the program segment x:=0; y:=O; cobegin begin x:=l; y:=y+x; end; begin y:=2; x:=x+3; end coend Which of the following indicate(s) possible values for the variables when the segment finishes execution? Ⅰ.x=1,y=2  Ⅱ.x=1,y=3  Ⅲ.x=4,y=6

选项 A、Ⅰ
B、Ⅰ and Ⅱ
C、Ⅰ and Ⅲ
D、Ⅱand Ⅲ

答案D

解析
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