Q2. Consider the following grammar:S- asb | Sb|ɛa. Give a one-sentence description of the language generated by thisgrammar.b. Show that this grammar is ambiguous by giving a single string thatcan be parsed in two different ways. Draw both parse trees.Q3. Design a CFG for a conditional statement. The syntax of a conditionalstatement is defined as following:IF(Expr)stmtELSEstmtIn other words, it is the concatenation of.• the keyword, IF• an opening parenthesis, (• an expression, Expr• a closing parenthesis, )• a statement, stmt• a keyword, ELSE• Finally, another statement, stmt

2. Given: A production rule set for grammar is provided. We need to define the language that can be…

Q2. Consider the following grammar: S- asb| Sb|ɛ a. Give a one-sentence description of the language generated by this grammar. b. Show that this grammar is ambiguous by giving a single string that can be parsed in two different ways. Draw both parse trees.

Q2. Consider the following grammar: S- asb| Sb|ɛ a. Give a one-sentence description of the language generated by this grammar. b. Show that this grammar is ambiguous by giving a single string that can be parsed in two different ways. Draw both parse trees.

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

Q2. Consider the following grammar:
S- asb | Sb|ɛ
a. Give a one-sentence description of the language generated by this
grammar.
b. Show that this grammar is ambiguous by giving a single string that
can be parsed in two different ways. Draw both parse trees.
Q3. Design a CFG for a conditional statement. The syntax of a conditional
statement is defined as following:
IF
(Expr)
stmt
ELSE
stmt
In other words, it is the concatenation of.
• the keyword, IF
• an opening parenthesis, (
• an expression, Expr
• a closing parenthesis, )
• a statement, stmt
• a keyword, ELSE
• Finally, another statement, stmt

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