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Aptitude | GATE CS 1998 | Question 70
Answer the following:
a. Let G1 = (N, T, P, S1) be a CFG where, N= {S1A, B}, T= {a,b} and P is given by
S1 → aS1b S1 → aBb
S1 → aAb B → Bb
A → aA B → b
A → a
What is L(G1)?
b. Use the grammar in part(a) to give a CFG for L2 = {ai bj ak bl | i, j, k, l ≥ 1, i= j or k=l} by adding not more than 5 production rule.
c. Is L2 inherently ambiguous?
Answer
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