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GATE Computer Science (CS) 2021 Shift 1 Solved Paper

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Question : 11

Total: 65

Suppose that L₁ is a regular and L₂ is a context-free language, Which one of the following languages is NOT necessarily context-free?

L₁ ⋅ L₂
L₁ ∪ L₂
L₁ ∩ L₂
L₁ - L₂

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