Programming languages ii - Modularity and scope

Question 1

Difference between function and procedure?

Answer 1

A function returns a value while a procedure does not.

Question 2

Modularity

Answer 2

Degree of relatively independent components (modules).

Question 3

Module

Answer 3

Part of a program.

Can contain one/several subroutines, functions or procedures.

Question 4

Library

Answer 4

Pre-compiled subroutines incorporable into a program.

Question 5

Global variable

Answer 5

Variable accessed within the whole duration of the program.

Question 6

Local Variable

Answer 6

Defined & can only be used within one part of the program.

Question 7

Scope

Answer 7

Section of code which variable can be used & has a value.

Question 8

Function

Answer 8

Block of code within a program
Unique identifiable name,
zero or more parameters
returns single value

Question 9

Procedure

Answer 9

Block of code within a program
Unique identifiable name,
zero or more parameters when called

Question 10

Argument

Answer 10

Data provided to function / procedure when called

Question 11

Pre-conditions

Answer 11

A condition that always must be true just prior to the execution of some section of code.