Programming

Question 1

Order of development methologies

Answer 1

Analysis, Design,Implementation, testing, documentation, evaluation

Question 2

analysis (Sytstem anayist)

Answer 2

what customer wants,when,how much going to pay,leagl,insurence

Question 3

design

Answer 3

pseudo code, flowcharts, structure diargrams

Question 4

implementation

Answer 4

start to code

Question 5

testing

Answer 5

try program, test it

Question 6

documentation

Answer 6

user manual, service instructions, tests

Question 7

evaluation

Answer 7

• efficient?,
• do it better?,
• learn things,
• what can gain for next time,
• meet customer requirements

Question 8

iteration

Answer 8

when you go back to a stage to change something

Question 9

functional requirements

Answer 9

what is the system going to do to meet requiremnts, consits of inputs,processes,outputs

Question 10

design stage

Answer 10

create series of steps that can be converted to code during implemtation, consider functional requirements

Question 11

structre diagrams

Answer 11

visual design technique, start at top when reading, then do each branch before moving onto next

Question 12

flowcharts

Answer 12

visual desgin technique, more detail than structure diagrams

Question 13

pseduo code

Answer 13

• written,
• iniditation code,
• similar to english language,
• hints towards programming language but without restricions

Question 14

real data type

Answer 14

decimal data type

Question 15

point of data types

Answer 15

computer need to know whether storing graphics,numbers,words therefore have to advise data type for varible

Question 16

naming conventions when naming a varible

Answer 16

must start with a lowercase letter, cannot contain spaces, can have numbers and symbols,must be meaningful

Question 17

what is the + in code?

Answer 17

Concationations

Question 18

nesting an if statement

Answer 18

times when logical to nest if statements, means second if will only fun if first true

Question 19

fixed loop

Answer 19

repeats a set of intructions a specific number of times

Question 20

conditional loop

Answer 20

runs till conition is met or while condition true

Question 21

simple conditions

Answer 21

only one condition being checked

Question 22

complex conditions

Answer 22

multiple conditions being checked

Question 23

logic operators

Answer 23

and, or, not

Question 24

and operator

Answer 24

both must be true

Question 25

or operator

Answer 25

one must be true

Question 26

not operator

Answer 26

reveres the truth value

Question 27

functions

Answer 27

random, length, round

Question 28

random function

Answer 28

provides a random value from between the limits, need to import random at start

Question 29

length function

Answer 29

returns the length of string, numbers of items in a list or array

Question 30

round function

Answer 30

only works with real(decimal numbers) rounds to a certain number of decimal places

Question 31

boolean varible

Answer 31

holds one of two values, true or false, must be wrote with capital, used to control decisions in a program

Question 32

boolean flag

Answer 32

boolean flag used to signal if something has happend or not, often used to track status or trigger actions

Question 33

array

Answer 33

* used to store multiple values in a single varible, * groups related values * , makes code shorter, cleaner, easier to manage

Question 34

creating arrays

Answer 34

colors=["red","green","blue"]

Question 35

changing a value

Answer 35

colors[1]="yellow"

Question 36

adding a new item

Answer 36

colors.append("purple")

Question 37

removing an item

Answer 37

colors.remove("yellow")

Question 38

length of array

Answer 38

array_length=len(colors) print(array_length)

Question 39

looping through array

Answer 39

for i in range(len(colors)) print(colors[i])

Question 40

why test

Answer 40

to ensure meets end user requirments, always use same data type

Question 41

three conditions need to test

Answer 41

normal, extreme,exeptional

Question 42

normal

Answer 42

data that should be accepted

Question 43

extreme

Answer 43

sits on boundries of data being entered

Question 44

exeptional

Answer 44

should not be accepted

Question 45

types of errors

Answer 45

syntax,execution,logic

Question 46

execution error

Answer 46

prevents the program from running, e.g refering to a varible that is not declared

Question 46

syntax error

Answer 46

breaking rules of language, e.g not closing brackets

Question 47

types of programming

Answer 47

machine code, high level language

Question 47

how to make code readable

Answer 47

interanl commentry, white space, meaningful varible names, inditation

Question 47

logic error

Answer 47

does not stop the program from running, and & or mixed up

Question 48

readablity of code

Answer 48

ensure code is readable so that other programmers can understand

Question 49

high level language

Answer 49

similar to english, needs to be translated before run

Question 49

machine code

Answer 49

understood by computer, binary

Question 49

translators

Answer 49

before code run needs to be translated into machine code, interperters and compilers

Question 50

interperter

Answer 50

does not produce object code, translates and executes each line of the program

Question 51

advantages of interperters

Answer 51

errors highlighted imidentally so easier to fix, can run partial code or under developed code

Question 52

disadvantages of interperters

Answer 52

translation not saved, if code repeated (loop) translated many times

Question 53

compiler

Answer 53

translates entire program at once, lists errors

Question 54

advantages of compilers

Answer 54

if no errors does not need to be translated again, translator program no longer required once translated

Question 55

disadvatages of compilers

Answer 55

if syntax errors will not run, errors may be harder to correct as not idteifed till whole code translated