Q4

MCQ1 mark, −0.25

Which one of the following are essential features of an object-oriented programming language? I and II only I and IV only I, II and IV only I, III and IV only

(A)

Abstraction and encapsulation

(B)

Strictly-typedness

(C)

Type-safe property coupled with sub-type rule

(D)

Polymorphism in the presence of inheritance

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