A.Option D

B.Option B

C.Option C

D.Option A

A.Sum is 600

B.Compilation fails at line n1.

C.Compilation fails at line n2.

D.A ClassCastException is thrown at line n1.

E.A ClassCastException is thrown at line n2.

A.ns = 50 s = 50 ns = 125 s =125
ns = 100 s =100

B.ns = 50 s = 50
ns = 125 s = 125
ns = 0 s = 125

C.ns = 50 s = 125 ns = 125 s = 125
ns = 0 s = 125

D.ns = 100 s =125
ns = 0 s = 125
ns = 125 s = 125

A.Enables the class implementation to protect its invariants

B.Prevents code from causing exceptions

C.Enables multiple instances of the same class to be created safely

D.Allows a class implementation to change without changing t he clients

E.Protects confidential data from leaking out of the objects

F.Permits classes to be combined into the same package

A.0

B.An exception is thrown at runtime

C.Null

D.Compilation fails