5. Implementing Software Solutions

Question 1

What are relational operators?

Answer 1

Operators which compare values to make a decision.
E.g., <, >, ==, != etc.

Question 2

Characteristics of a railroad diagram?

Answer 2

• Left to right
• Follow tracks that could be used by a train
• Single entry and exit points
• Can be linked to subroutines

Question 3

Elements of an EBNF statement?

Answer 3

=: is defined as
{}: repeatable elements which may be optional
[]: optional elements
(): grouped elements
<>: language element which are predefined
|: “or”