Concept drill
language-recognition
GATE CSE & IT · Context-Free Languages · 2019-2026
2
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elite explanations
2
years appeared
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Hopcroft-Ullman / Dragon Book
Automata, languages, parsing, syntax-directed translation
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All concepts →2026 PYQ
Let $\Sigma=\{a, b, c, d\}$ and let $L=\left\{a^i b^j c^k d^l \mid i, j, k, l \geq 0\right\}$. Which of the following constraints ensure(s) that the language $L$ is context-free?
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2019 PYQ
Which one of the following languages over $\Sigma=\{a, b\}$ is NOT context-free?
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