Which of the below listed statements are true? (select all that apply) Select one or more: O The Pumping lemma for regular languages is used to prove non-regularity of languages. O Every context-free language (CFL) is at the same time a regular language (RL). O The language oi13, where i,j > o is regular. O A grammar is ambiguous, if for every accepting word, there exists exactly one possible derivation.

Which of the below listed statements are true? (select all that apply) Select one or more: O The Pumping lemma for regular languages is used to prove non-regularity of languages. O Every context-free language (CFL) is at the same time a regular language (RL). O The language oi13, where i,j > o is regular. O A grammar is ambiguous, if for every accepting word, there exists exactly one possible derivation.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Which of the below listed statements are true?
(select all that apply)
Select one or more:
O The Pumping lemma for regular languages is used to prove non-regularity of languages.
O Every context-free language (CFL) is at the same time a regular language (RL).
O The language oi13, where i,j > o is regular.
O A grammar is ambiguous, if for every accepting word, there exists exactly one possible derivation.

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