Answered: Consider the following context-free…

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

Consider the following context-free grammar.

S→aBa∣B

B→bbC∣cc∣ε

C→cC∣bBcCb∣ε

Notice that the start variable is not on the right hand side of any replacement rule. This question addresses how the grammar will be changed when applying the second step of converting it to Chomsky normal form -- namely, removing ε-rules.

Which of the following rules would be added to the grammar when the ε-rules are removed? Select all that apply.

Question 2 options:

S→ε

S→bb

B→bb

C→c

C→bcb

Expert Solution

Step 1

For converting into Chomsky normal form, we have to remove the ,
We can use

Cc
Bbb
Cbcb

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