A.s.replace(s.indexOf("A"), s.indexOf("C"), "Q");

B.s.replace(s.indexOf("B"), s.indexOf("B"), "Q");

C.s.replace(s.indexOf("A"), s.indexOf("B"), "Q");

D.s.replace(s.indexOf("B"), s.indexOf("C"), "Q");

A.The compilation fails.

B.abc def

C.ab cd ef

D.An ArrayIndexOutOfBoundsException is thrown at runtime.

E.ad be cf

A.357

B.An ArrayIndexOutOfBoundsException is thrown at runtime.

C.235

D.35

E.2357

A.A and B are functionally equivalent.

B.B, because all values provided by the calling code should be enquoted.

C.A, because it is unnecessary to enclose identifiers in quotes.

D.A, because it sends exactly the value of user provided by the calling code.

E.B, because enquoting values provided by the calling code prevents SQL injection.

A.adf

B.abcd

C.abdf

D.The compilation fails.

E.abd