Chapter 8

Question 1

Variable

Answer 1

A named memory location that can store data. The data can change whilst a program is running.

Question 2

Constant

Answer 2

A named memory location that can store data. The data cannot change whilst a program is running.

Question 3

Identifier

Answer 3

A name given to a variable, constant, data structure or subroutine

Question 4

Assignment

Answer 4

A type of programming statement that stores data in a variable or constant

Question 5

Data types

Answer 5

string; any characters including letters, numbers, and/or symbols integer; whole numbers real; decimal number single; decimal number double; decimal number boolean; true or false char; a single character

Question 6

Data type

Answer 6

Characteristics of a piece of data

Question 7

Casting

Answer 7

Converting data from one data type to another data type

Question 8

Output

Answer 8

Data that is displayed to the user, usually on screen

Question 9

Concatenation

Answer 9

Joining two or more strings together

Question 10

Input

Answer 10

The user entering data into the program, usually from a keyboard

Question 11

Arithmetic operator

Answer 11

A symbol that performs a mathematical function (including DIV and MOD)

Question 12

Sequence

Answer 12

The first of three programming constructs. Instructions are run in the order theyre written

Question 13

Selection

Answer 13

The second of three programming constructs. A condition is checked and this determines which code is run or not run. IF statements and CASE statements.

Question 14

Logical operators

Answer 14

A symbol that performs a comparison resulting in true or false. <>, <=, >=,…

Question 15

Boolean operator

Answer 15

A symbol that joins many logical comparisons, can be AND, NOT or OR

Question 16

Iteration/loop

Answer 16

The third of three programming constructs. Code is run multiple times, either a finite number of times (Count controlled), until a condition is true(Post condition), or while a condition is true(pre condition)

Question 17

Nested statement

Answer 17

A construct(selection or iteration) that is inside another construct

Question 18

Subroutine

Answer 18

A self contained piece of code that has an identifier and can be called from elsewhere in a program

Question 19

procedure

Answer 19

A subroutine that doesnt return a value to the program that called it

Question 20

function

Answer 20

A subroutine that returns a value to the program that called it

Question 21

Parameter

Answer 21

A value that is sent to a subroutine

Question 22

Scope

Answer 22

The sections in the code where the variable or constant can be accessed

Question 23

Global scope

Answer 23

The variable or constant can be accessed from anywhere in the program

Question 24

Local scope

Answer 24

The variable or constant can only be accessed in the subroutine it is declared within

Question 25

Library routine

Answer 25

a pre written subroutine that can be called from within a program (ROUND, RANDOM)

Question 26

Maintainable program

Answer 26

A program that has key features to help it be understood at a later data

Question 27

How to have a maintainable program:

Answer 27

Meaningful identifiers, comments(text within a program to define its function, not executed when the program is run), subroutines(help to reduce redundant code, can be reused in the program, help to split the code down into sections)