12.08 - Stepwise refinement

Question 1

What is stepwise refinement?

Answer 1

Stepwise refienement is the method of breaking down the steps of an outline solution into smaller steps until it is detailed enough.

Question 2

What is the use of stepwise refinement?

Answer 2

It is used to solve bigger problems by breaking them down into smalled steps using stepwise refinement.

Question 3

How to make the solution programmable?

Stepwise refinement

Answer 3

the steps need to be broken down into basic constructs such as sequences, assignment, selection, repetition, input and output

Question 4

What are modules?

Answer 4

They are another method of developing a solution by decomposing the problem into sub tasks. Each sub task can be considered a module that is refined seperately.They are procedured and functions that group together a number of steps and give them an identifier

Question 5

What are procedures?

Answer 5

Procedures group together a number of steps and give them a name that can be used to refer the group of steps.

Question 6

What are functions?

Answer 6

Functions group together a number of steps and give them a name that produces and returns a value that is used in an expression

Question 7

How should modules be designed?

Answer 7

They should be designed to be self-contained and not rely on external variables

Question 8

How should all variables required by a module be passed to it?

Answer 8

Using parameters

Question 9

What are local variables?

Answer 9

Variables used only within a module

Question 10

What are global variables?

Answer 10

All variables