engineering recuitment GATE CSE 2023-24 Test Series Theory of Computation Context Free Languages and Pushdown Automata Context Free Languages
If L1 and L2 are context free language, then which of the following is not necessarily a context free language?
1
\({L_1} \cap \;{L_2}\)
2
\(L_1^* \cup \;L_2^*\)
3
\({L_1}.{L_2}\)
4
\(\overline {{L_1} \cup {L_2}} \)