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
Related questions
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?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd5eb70a9-29a2-4038-8709-4ec0c3e17286%2Fd185563b-9300-45e5-b6f7-9ae745601352%2Fdlz19r_processed.jpeg&w=3840&q=75)
Transcribed Image Text: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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