Define ambiguity
A grammar that produces more than one parse tree for some sentence is said to be ambiguous. An ambiguous grammar is one that produces more than one leftmost or more…
Define context-free language
Given a grammar G with start symbol S, we can use the ==> relation to define L(G) , the language generated by G. We say a string of terminals w…
Write a grammar to define simple arithmetic expression
Grammar to define simple arithmetic expressionexpr ->expr op exprexpr ->(expr)expr -> – exprexpr ->idop -> + | – | * | / | ^
Define parse trees
The graphical representation for derivations that filters out the choice regarding replacement order. This representation is called the parse trees. It represents the hierarchical syntactic structure of sentences that is…
Define context-free grammar
The syntactic specification of a programming language can be formed by a notation called a context-free grammar, which is also called a BNF (Backus- Naur form ) description. Context-free grammars…
What is Deterministic Automata?
A finite automaton is deterministic ifa. It has no transition of input E .b. For each state s and input symbol a, there is at most one edge labeled a leaving…
Define finite automata
A better way to convert a regular expression to a recognizer is to construct a generalized transition diagram from the expression. This diagram is called a finite automaton
Regular expression over ∑={a,b,c} that represent all string of length 3
Regular expression over ∑={a,b,c} that represent all string of length 3 => (a+b+c)(a+b+c)(a+b+c)