To show that a language is context-free, you could construct a PDA for it. You could also □ (d) a or c (a) give a context-free grammar for it. (c) use closure properties. (b) use the pumping lemma for regular languages.

To show that a language is context-free, you could construct a PDA for it. You could also □ (d) a or c (a) give a context-free grammar for it. (c) use closure properties. (b) use the pumping lemma for regular languages.

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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Intelligent Machines

Machines that use artificial intelligence to learn from the environment and past experiences to perform better in the presence of variability and uncertainty are called intelligent machines. Intelligence develops according to environment and experience. It is human-like behavior. When the computer system or any programmed machine learns from the inputs and corresponding outputs, it can be called an intelligent machine.

Question

To show that a language is context-free, you could construct a PDA for it. You could also
(d) a or c
(a) give a context-free grammar for it.
(c) use closure properties.
(b) use the pumping lemma for regular languages.
□ (e) b or c

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