Contents

- 1 Is regular grammar unambiguous?
- 2 Can regular language be unambiguous?
- 3 What is language ambiguous grammar?
- 4 Which grammar is always unambiguous?
- 5 What do you mean by regular grammar?
- 6 What is ambiguous grammar can a regular grammar be ambiguous?
- 7 What is ambiguous and unambiguous grammar?
- 8 How do you find unambiguous grammar?
- 9 Is every regular grammar LL 1?
- 10 What is regular languages and regular grammar?
- 11 What is regular grammar with example?
- 12 What is unambiguous language?
- 13 How is an ambiguous grammar different from an unambiguous grammar?
- 14 Which is an example of an inherently ambiguous language?
- 15 Can a grammar be made ambiguous by adding duplicates?
- 16 What does it mean when a string is ambiguous?

## Is regular grammar unambiguous?

if a grammar is regular then it will be Context free also [as per chomsky hierarchy] it may be or may be not ambiguous depending on grammar. But it is sure any ambiguous regular grammar can be converted into unambiguous regular grammar.

## Can regular language be unambiguous?

A regular language is a 1-unambiguouslanguage if it is denoted by some 1-unambiguous regular expression. We give a Kleene theorem for 1-unambiguous languages and characterize 1-unambiguous regular languages in terms of structural properties of the minimal deterministic automata that recognize them.

## What is language ambiguous grammar?

A grammar is said to be ambiguous if there exists more than one leftmost derivation or more than one rightmost derivation or more than one parse tree for the given input string. If the grammar is not ambiguous, then it is called unambiguous. If the grammar has ambiguity, then it is not good for compiler construction.

## Which grammar is always unambiguous?

Explanation: Deterministic CFGs are always unambiguous , and are an important subclass of unambiguous CFGs; there are non-deterministic unambiguous CFGs, however. Explanation: The closure property of a context free grammar does not include iteration or kleene or star operation. 4.

## What do you mean by regular grammar?

Definition: Regular Grammar A regular grammar is a mathematical object, G, with four components, G = (N, Σ, P, S), where. N is a nonempty, finite set of nonterminal symbols, Σ is a finite set of terminal symbols , or alphabet, symbols, P is a set of grammar rules, each of one having one of the forms. A → aB.

## What is ambiguous grammar can a regular grammar be ambiguous?

In computer science, an ambiguous grammar is a context-free grammar for which there exists a string that can have more than one leftmost derivation or parse tree, while an unambiguous grammar is a context-free grammar for which every valid string has a unique leftmost derivation or parse tree.

## What is ambiguous and unambiguous grammar?

## How do you find unambiguous grammar?

A grammar can be unambiguous if the grammar does not contain ambiguity that means if it does not contain more than one leftmost derivation or more than one rightmost derivation or more than one parse tree for the given input string….Unambiguous grammar will be:

- S → AB.
- A → Aa | a.
- B → b.

## Is every regular grammar LL 1?

Computer Science Engineering (CSE) Question And LL(1) parses only unambiguous grammar, so statement P is False. Statement Q is true is for every regular set, we can have a regular grammar which is unambiguous so it can be parse by LR parser.

## What is regular languages and regular grammar?

Regular Grammar : A grammar is regular if it has rules of form A -> a or A -> aB or A -> ɛ where ɛ is a special symbol called NULL. Regular Languages : A language is regular if it can be expressed in terms of regular expression. Note : Two regular expressions are equivalent if languages generated by them are same.

## What is regular grammar with example?

For example, = {a, b}, V = { S } and P = { S -> aS, S -> bS, S -> } is a regular grammar and it generates all the strings consisting of a’s and b’s including the empty string.

## What is unambiguous language?

: clearly expressed or understood : not ambiguous.

## How is an ambiguous grammar different from an unambiguous grammar?

Ambiguous grammar. Jump to navigation Jump to search. In computer science, an ambiguous grammar is a context-free grammar for which there exists a string that can have more than one leftmost derivation or parse tree, while an unambiguous grammar is a context-free grammar for which every valid string has a unique leftmost derivation or parse tree.

## Which is an example of an inherently ambiguous language?

While some context-free languages (the set of strings that can be generated by a grammar) have both ambiguous and unambiguous grammars, there exist context-free languages for which no unambiguous context-free grammar can exist. An example of an inherently ambiguous language is the union of with .

## Can a grammar be made ambiguous by adding duplicates?

This language also has the unambiguous grammar, consisting of a single production rule: …meaning that the unique production can only produce the empty string, which is the unique string in the language. In the same way, any grammar for a non-empty language can be made ambiguous by adding duplicates.

## What does it mean when a string is ambiguous?

The existence of multiple derivations of the same string does not suffice to indicate that the grammar is ambiguous; only multiple leftmost derivations (or, equivalently, multiple parse trees) indicate ambiguity. is an unambiguous grammar for the language { 0+0, 0+1, 1+0, 1+1 }.