Consider the grammar below. -> | ; -> = ce> -> + | - | -> | const -> a | b |C d In the rightmost derivation of "a=const; b=a", what is the 7th sentential form? (the first one is ) Select one: a. = ; a = b O b. = ; b = a O c.; = O d.; = a O e.;b = a

Consider the grammar below. -> | ; -> = ce> -> + | - | -> | const -> a | b |C d In the rightmost derivation of "a=const; b=a", what is the 7th sentential form? (the first one is ) Select one: a. = ; a = b O b. = ; b = a O c.; = O d.; = a O e.;b = a

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 grammar below.
<ss> -> <s> | <s> ; <ss>
<s> -> <V> = <e>
<e> -> <e> + <t> | <e> - <t> | <t>
<t> -> <v>| const
<v> -> a | b| c|d
In the rightmost derivation of "a=const ; b=a", what is the 7th
sentential form? (the first one is <ss>)
Select one:
a.<v> = <e>; a = b
b.<v> = <e>;b = a
C.<s>; <v> = <e>
d.<s>; <v> = a
e.<s> ; b = a

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