Section 2

Question 1

What is a variable?

Answer 1

Is used in programming to store data

Question 2

What is a constant?

Answer 2

Is a variable that cannot be changed during the execution of the program

Question 3

Data Type: String

Answer 3

zero or more characters in a quote mark

Question 3

Data Type: Real/Float

Answer 3

Decimals

Question 4

Data Type: Boolean

Answer 4

Only accepting true or false

Question 5

What is camelCase and its advantages?

Answer 5

To separate words by making first letter of second word capitalized
Advantages are: Easier to remember Consistent

Question 6

What is snake_case?

Answer 6

Where all words are in lowercase and are separated by an underscore
E.G. max-number-of-players
Could be used to name functions

Question 7

What is PascalCase?

Answer 7

Each word separated by capitalizing the first letter of each word?

Question 8

String conversion: int(input(

Answer 8

Allows integer to be an input or part of string

Question 9

String conversion: float(input(

Answer 9

Allows decimal to be an input or part of string

Question 10

String conversion: str

Answer 10

Just means string

Question 11

To add

Answer 11

+

Question 12

To subtract

Answer 12

-

Question 13

To multiply

Answer 13

*

Question 14

To divide

Answer 14

/

Question 15

MOD(modulus)

Answer 15

%(finds the remainder)

Question 16

DIV(quotient)

Answer 16

// finds the quotient (the number before the decimal point)

Question 17

Exponentiation

Answer 17

^/** used to find the power

Question 18

not equal to

Answer 18

!=

Question 18

Equal to

Answer 18

==

Question 19

less than

Answer 19

<

Question 20

less than equal to

Answer 20

<=

Question 21

greater than

Answer 21

>

Question 22

greater than equal to

Answer 22

> =

Question 23

Selection

Answer 23

if and else statements

Question 24

condition controlled iteration

Answer 24

While, endwhile

Question 25

Iteration

Answer 25

A for end for loop is a definite count controlled loop

Question 26

Data Structure: Array

Answer 26

A structure used to hold multiple Items of the same type e.g. day=["MON","TUES","WED"]

Question 27

Two-Dimensional Arrays

Answer 27

Sales[58,56,43,67][etc,etc,etc][etc,etc,etc]

Question 28

String manipulation: What does concatenating mean?

Answer 28

Joining together

Question 29

String manipulation: Index

Answer 29

Starts at 0

Question 30

String Manipulation: If student name = "Jumal" in terms of index what position is letter J?

Answer 30

studentName[0] = "J"

Question 31

Substrings: how to isolate part of a string? e.g. productCode="GAR201834" Isolate into GAR2018

Answer 31

productType = productCode[0:3] year=productCode[3:7] print("productType=",productType) print("Year=",year) This will print: Product type=GAR Year=2018

Question 32

How to find length of string?

Answer 32

len(mystring)=length of my strength It includes all characters and even spaces

Question 33

Find first n characters of a string?

Answer 33

nChars= myString[0:n]

Question 34

Subroutines

Answer 34

Named block of code, separated from the main program two types: functions and procedures functions returns a value to a variable with a specified call

Question 35

Advantages of subroutines

Answer 35

-debugging and maintaining is easier as they are short code -Subroutines can be easily tested to be correct separately -particular subroutine can be called several times saved in a library and used in other programs

Question 36

How to generate a random number?

Answer 36

First off import random for any random operation Then random.randint(a,b) a,b = between two numbers

Question 37

Robust and secure programming

Answer 37

Data validation techniques used to check validity of data the user has entered

Question 38

Testing

Answer 38

ensure only input or execution of program works properly

Question 39

Techniques for Robust and secure programming

Answer 39

-Length Check: string entered must be greater or equal to minimum length -Presence Check: string should not be empty -Range Check: data must lie within given range -Authentication: test if person is who they say to be e.g. fingerprint, facial recognition, password

Question 40

Techniques for Testing

Answer 40

-Syntax error: prevent program running because of spelling or grammar mistake -Logic error: harder to spot.May run but may crash or give an incorrect or unexpected output

Question 41

Selecting and using suitable test data: Normal Data

Answer 41

using examples of typical data that the program is designed to handle

Question 42

Selecting and using suitable test data: Boundary data

Answer 42

which includes both ends of the allowed range as well as invalid data

Question 43

Selecting and using suitable test data: Erroneous data

Answer 43

data of the wrong type e.g. non-numeric characters numeric field