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Let S --> aA | Bb C --> a B--> b, A --> aBAD | SBBb
a. Describe which nonterminals are useless?
b. Write down the algorithm for finding useless/productive nonterminals
c. Describe how this gives you the algorithm for whether language generated by grammar is empty.
Give a construction that assumes you are given a DFA for L and show how to construct an NFA (with or without ε-moves) to recognize sort(L).
Design a Mealy FSM with the input A and an output Z. If 10101 shows up on A, then in same cycle 1 must show up on Z, else Z is 0.
Considering a single programmed operating system, what is the minimal total time required to complete executions of the two processes? You should explain your answer with a diagram.
Create a recursive java method maximum that calculate the maximum element of a linked list of integers.The solution must be simplified and should not use class Node or head
How the problem would be encountered in attempting to represent the following statements in Predicate logic. it should be possible to: John only likes to see French movies.
Show that the language F = {a^i b^j c^k | i, j, k greater than or equal to 0 and if i = 1 then j = k} is not regular. Show, however, that it satisfies the statement of the pumping lemma
Write a grammar for the language consisting of strings that have n copies of the letter a followed by same number of copies of the letter b, where n>0
Write down the set of token types to be returned by your lexical analyzer. Describe regular expressions for this set of token types.
We know by rice's theorem that none of the following problems are decidable. However,are they recursively enumerable,or non-RE? IS L(M) infinite?
Suppose f is a function that returns the result of reversing the string of symbols given as its input, and g. What ambiguity exists in the statement x?
Consider the language L = L1 ∩ L2, where L1 = {ww^R : w ∈ {a, b}* and L2 = {a^n b*a^n: n ≥ 0}. Write the first four strings in the lexicographic enumeration of L?
Create a standard 1-tape Turing machine M to calculate the function sub3. Specifically, calculate sub3 of a natural number represented in binary.
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