A.28false29 true

B.285 < 429 true

C.compilation fails

D.true true

A.400 200

B.Compilation fails.

C.400 400

D.200 200

A.Reference type is Y; object type is Y.

B.Reference type is X; object type is Z.

C.Reference type is Z; object type is Z.

D.Reference type is Z; object type is Y.

A.10

B.A compile time error occurs

C.20

D.10

A.[Robb, Bran, Rick, Bran]

B.[Robb, Rick, Bran]

C.[Robb, Rick]

D.An exception is thrown at runtime.