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Q.
Assume the statements S1 and S2 given as:S1: Given a context free grammar, there exists an algorithm for determining whether L (G) is infinite.
S2: There exists an algorithm to determine whether two context free grammars generate the same language.
Which of the following is true?

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1.
Which of the following statement is false?
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2.
Consider the following context free languages:
L1 = {0^i 1^j 2^k | i+j = k}
L2 = {0^i 1^j 2^k | i = j or j = k}
L3 = {0^i 1^j  | i = 2j+1}
 Which of the following option is true?
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Which of the following does the given Mealy machine represents?

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Which of the following language(s) generates more than one parse tree for a string ?

L1 = {a^nb^mc^md^n ? {a, b, c, d}* | n, m ? 0} 
      ? {a^nb^nc^md^m ? {a, b, c, d}* | n, m ? 0} 

L2 = {a^nb^mc^m ? {a, b, c}* | n, m ? 0} 
      ? {a^nb^nc^m ? {a, b, c}* | n, m ? 0}

L3 = {a^nb^mc^p ? {a, b, c}* | n ? m; n, m ? 0} 
      ? {a^nb^mc^p ? {a, b, c}* | m ? p; n, m ? 0}
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A CFG is close under ________
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