Eliminate \varepsilon, unit, and useless productions from the grammar: — PYQDeck

PyQdeckBEU PYQ Archive Subjects

Back to the 2023 paper

Module 2: Context-Free Languages (CFL) and PDA

20237m

Eliminate $\varepsilon$ , unit, and useless productions from the grammar:

A → bA | Bba | aa
B → aba | b | D
C → CA | AC | B
D → a | $\varepsilon$

Search Google Ask AI

Similar questions

Formal Language & Automata TheoryBegin with the grammar: S \to ASB / \epsilon A \to aAS / a B \to SbS / A / bb (i) Eliminate \epsilon-productions. (ii) Eliminate unit productions in the resulting grammar. (iii) Eliminate any useless symbol in the resulting grammar. (iv) Put the resulting grammar into CNF.202214m Compiler DesignProve that the following grammar is ambiguous on string 'aab': S \rightarrow aS \mid aSbS \mid \varepsilon20257m Compiler DesignDiscuss ambiguity in grammar. Show that the given grammar is ambiguous: S \rightarrow ABA A \rightarrow aA \mid \varepsilon B \rightarrow bB \mid \varepsilon20257m FORMAL LANGUAGE & AUTOMATA THEORYShow that the following grammar is ambiguous: S \rightarrow SS | aSb | bSa | \epsilon20257m

PreviousDesign a PDA (empty stack and final state both) for L = \{ WW^r \mid W \in \{a,b\}^* \}.NextDefine Chomsky Normal Form. Convert the CFG: S → aSb | ab | Aa A → aab to CNF.