Section 9 Chapter 54 - Backaus Naur Form

Question 1

Syntax for defining a syntactic variable for all digits

Answer 1

::= 0|1|2|3|4|5|6|7|8|9

Question 2

Syntax for defining a syntactic variable for any natural number

Answer 2

::= |

Question 3

Syntax diagram

Answer 3

Graphical representation of backus-naur

Question 4

How to represent a terminal element in a syntax diagram

Answer 4

Ellipse

Question 5

Terminal element

Answer 5

An element that cannot be broken down

Question 6

Symbol for non-terminal element

Answer 6

Rectangle

Question 7

Why BNF can represent languages that cannot be represented by a regular expression

Answer 7

It can handle recursive definitions