Back to the 2022 paper

Module 2: Context-free languages and pushdown automata

20222m

If L1L1 and L2L2 are context free languages, L1−L2L1 - L2 is ___________ context-free.
(i) always
(ii) sometimes
(iii) never
(iv) None of these

Similar questions

AI LearningWeb Platform

Coursify — Personal AI Course Generator

Struggling with a difficult subject or concept? Turn any engineering topic into a structured course with interactive lessons, quizzes, and research-backed explanations.