Defensive design section 6

Question 1

What is defensive design

Answer 1

1) anticipate how uses might misuse the program
2) ensure code is maintain
3) reduce the number of errors in code

Question 2

input sanitation

Answer 2

removing any unwanted characters before passing through the data

Question 3

input validation

Answer 3

checking if data meets certain criteria before passing data

Question 4

range check

Answer 4

data is within specific range

Question 5

presence check

Answer 5

checks data has actually been entered

Question 6

check digit

Answer 6

numerical data has been entered accurately

Question 7

Format check

Answer 7

data has correct format

Question 8

look up table

Answer 8

checks data values against acceptable values

Question 9

length check

Answer 9

correct length

Question 10

Authentication

Answer 10

confirm the identity of a user before they’re allowed to access certain places

Question 11

ways to increase security

Answer 11

1) force users to use strong passwords
2) limit the number of failed authentication
3) ask for random selection of characer

Question 12

what is a well maintained programe

Answer 12

makes it easy for other programmers to understand what the code does

Question 13

comments

Answer 13

are useful for explaining what the key features of a program do

Question 14

indentation

Answer 14

can be used to seperate different statements in the program

Question 15

variables

Answer 15

should be named so that refer to what they actually do

Question 16

What does IDE mean

Answer 16

integrated development environment

Question 17

what is an IDE

Answer 17

a piece of software that provides features to help a programmer to develop their program

Question 18

name the the features of the interface

Answer 18

code editor
run time environment
explorer window
output window
error diagnostics
break point

Question 19

What is a code editor, what does it feature.

Answer 19

where the code is written

most will have line numbering, auto-colour coding for things like strings, auto correct e.g.

Question 20

What is a run time environment, how does it help with testing?

Answer 20

allows the code to be run quickly within the IDE

can help identify logic errors in the program

Question 21

What is an explorer window

Answer 21

will help navigate through programs

Question 22

What is an output window

Answer 22

to show the output from a program when it is run

Question 23

What are error diagnostics, how does it help with testing?

Answer 23

help to find and fix errors

tell you the location of the error and suggest ways to fix it

Question 24

What are break points.

Answer 24

common debugging tool, they can stop the program on certain lines so you can gather information like the value of variables as the program is running

Question 25

what are the common features inside an IDE

Answer 25

translator
auto documentation
Graphical user interface (GUI)

Question 26

what does the translator do

Answer 26

will translate the source code into machine code

Question 27

what does Auto documentation do

Answer 27

helps with the maintenance and can extract certain features of a program
this information is stored in a separate doc

Question 28

what does GUI do

Answer 28

helps the programmer design a user interface by building it up graphically rather than having to design it