计算机考试试题及答案解析

单项选择题

1.publicinterfaceA{
2.publicvoiddoSomething（Stringthing）；
3.}
1.publicclassAImplimplementsA{
2.publicvoiddoSomething（Stringmsg）{}
3.}
1.publicclassB{
2.publicAdoit（）{
3.//morecodehere
4.}
5.
6.publicStringexecute（）{
7.//morecodehere
8.}
9.}
1.publicclassCextendsB{
2.publicAImpldoit（）{
3.//morecodehere
4.}
5.
6.publicObjectexecute（）{
7.//morecodehere
8.}
9.}
Whichstatementistrueabouttheclassesandinterfacesintheexhibit？（）
A.publicinterfaceA{
B.publicvoiddoSomething（Stringthing）；
C.}
D.publicclassAImplimplementsA{
E.publicvoiddoSomething（Stringmsg）{}
F.}
G.publicclassB{
H.publicAdoit（）{
I.//morecodehere
J.}
K.
L.publicStringexecute（）{
M.//morecodehere
N.}
O.}
P.publicclassCextendsB{
Q.publicAImpldoit（）{
R.//morecodehere
S.}
T.
U.publicObjectexecute（）{
V.//morecodehere
W.}
X.}
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