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Q 1 . [ 1 0 Points ] Let L be any language over an alphabet Sigma . Prove or disprove L + is
Q Points Let L be any language over an alphabet Sigma Prove or disprove L
is nite
only if L
Q Points Draw a DFA for the language over input alphabets Sigma that accepts
strings a starting with b ending with c starting with and ending with
Q Points Let Sigma For each of the following languages design a DFA with
minimal number of states that accept the language.
i Draw a DFA that accepts the string or
ii Draw a DFA that accepts all strings but
Q Points Design a DFA that accepts all unsigned binary integers that are less than
Examples:
Q Points Design a DFA that accepts all positive decimal integers divisible by
Examples:
Q Points Let G be a grammar with the start variable S and the following productions:
S aA lambda
A bbS
i Give a simple description of the language LG generated by grammar G above.
ii Show a derivation of the string w abbabb from G
iii Suppose L w : w in LG and w What is L
R the reverse of L
Q Points Design a DFA that accepts every string w over the alphabet a b c in
which no two consecutive symbols are the same.
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