Consider the following languages L₁ = { ww | w ∈ {a, b}* } L₂ = { wwᴿ | w ∈…

GATE · 2001 · CS · Question 2 subparts

Consider the following languages

L₁ = { ww | w ∈ {a, b}* }

L₂ = { wwᴿ | w ∈ {a, b}*, wᴿ is the reverse of w }

L₃ = { 0²ⁱ | i is an integer }

L₄ = { 0ⁱ² | i is an integer }

Which of the languages are regular?

  1. A.

    Only L₁ and L₂

  2. B.

    Only L₂, L₃ and L₄

  3. C.

    Only L₃ and L₄

  4. D.

    Only L₃

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