1.Given the following Context Free Grammar, show the derivation for the followingstrings. -> = ; -> -> -> ; -> x -> y -> z -> + -> * -> - ->1 | 2 | 3 | 4 |5 | 6 | 7 | 8 | 9 | 0String to be derived: x = x +y2 - z2.Show a left-derivation for the following grammar based on the for the string aaaab1. S→ AB2. А> ааA4. В > ВЬ3. А >15. В >13.Consider CFG G = ({S}, {a, b, c}, R, S) where R = {S > Sbbs | SacS | a}. Show how the%3Dstring abbaacabba4.What cause ambiguity?

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1. Given the following Context Free Grammar, show the derivation for the following strings. -> = ; -> -> -> ; -> x -> y -> z -> + -> -> - -> 1 | 2 | 3 | 4 | 5 | 6| 7 | 8 | 9 | 0 String to be derived: x = x + y * 2 - z

1. Given the following Context Free Grammar, show the derivation for the following strings. -> = ; -> -> -> ; -> x -> y -> z -> + -> -> - -> 1 | 2 | 3 | 4 | 5 | 6| 7 | 8 | 9 | 0 String to be derived: x = x + y * 2 - z

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

1.
Given the following Context Free Grammar, show the derivation for the following
strings.
<statement> -> <ld> = <Expr>;
<Expr> -> <ld>
<Expr> -> <Num>
<Expr> -> <Expr> <Op> <Expr>;
<ld> -> x
<ld> -> y
<ld> -> z
<Op> -> +
<Op> -> *
<Op> -> -
<Num> ->
1 | 2 | 3 | 4 |5 | 6 | 7 | 8 | 9 | 0
String to be derived: x = x +y
2 - z
2.
Show a left-derivation for the following grammar based on the for the string aaaab
1. S→ AB
2. А> ааA
4. В > ВЬ
3. А >1
5. В >1
3.
Consider CFG G = ({S}, {a, b, c}, R, S) where R = {S > Sbbs | SacS | a}. Show how the
%3D
string abbaacabba
4.
What cause ambiguity?

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