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GATE 2017 · CS2 - Afternoon
Theory of ComputationPush Down Automata: CFL & DCFLmediumMCQ1 mark
Let L1, L2 be any two context-free languages and R be any regular language. Then which of the following is/are CORRECT? I. L1 ∪ L2 is context-free. II. ~L1 is context-free. III. L1 - R is context-free. IV. L1 ∩ L2 is context-free.
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