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PDA can be represented with the help of

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1.
Consider the NPDA ?Q = {q0, q1, q2}, ? = {0, 1}, ? = {0, 1, ?}, ?, q0, ?, F = {q2}?, where (as per usual convention) Q is the set of states, ? is the input alphabet, ? is stack alphabet, ? is the state transition function, q0 is the initial state, ? is the initial stack symbol, and F is the set of accepting states, The state transition is as following
Which one of the following sequences must follow the string 101100 so that the overall string is accepted by the automaton? 
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2.
Regarding the power of recognition of languages, which of the following statement is false?
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3.
PDA is more powerful than
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4.
Push down automata accepts which language?
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5.
Which of the following languages are context-free?

L1 = {ambnanbm ? m, n ? 1}
L2 = {ambnambn ? m, n ? 1}
L3 = {ambn ? m = 2n + 1}
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