data types and structures

Question 1

integer(int)

Answer 1

data type for storing rational numbers e.g. x=5

Question 2

string(str)

Answer 2

data type for storing characters and must have quotation marks around it e.g. myName=’‘John’

Question 3

float

Answer 3

data type for storing irrational numbers e.g. pi=3.142

Question 4

boolean (bool)

Answer 4

data type for storing true or false statements e.g. flag=True

Question 5

how would you display a data type (Integer, String, Float, Boolean) on screen?

Answer 5

use the print() function

Question 6

how would you collect data from the user?

Answer 6

use input() function e.g. myName= input(“Enter your name”)

Question 7

how would you display “welcome, (users input)” onto the screen

Answer 7

#create a variable for the users name e.g. "myName"
#ask the user to input the value 
#print your statement

myName=input(“Enter your name”)
print(“welcome”,myName)

Question 8

data

Answer 8

a value or set of values e.g. 37, HELLO

Question 9

data structure

Answer 9

a way of storing data in a computers memory so that it can be used efficiently e.g. Array, Linked List, Stack, Queue, Tree, Graph

Question 10

linear data structure

Answer 10

elements are stored in a linear sequence

e.g. Array, Linked List, Stack, Queue

Question 11

non-linear data structure

Answer 11

no specific sequence for storage of data

e.g. Tree, Graph

Question 12

static data structure

Answer 12

data structure with a a fixed memory size e.g. Array

Question 13

dynamic data structure

Answer 13

data structure where memory can be updated e.g. linked list

Question 14

homogenous data structure

Answer 14

a data structure where data of the same type can be stored e.g. Array

Question 15

non-homogenous data structure

Answer 15

a data structure where data of different types can be stored e.g. Linked List

Question 16

one dimensional array

Answer 16

a data structure that stores a sequence of elements only in one dimmension

Question 17

two dimensional array

Answer 17

an array within an array

Question 18

what is a list in python?

Answer 18

A list is a data structure that is a changeable, ordered sequence of elements.

Each element or value that is inside of a list is called an item.

lists are defined by having values between square brackets [ ]

Question 19

what method would you use too add one element to a list

Answer 19

append():

Question 20

what method would you use to give the overall length of a list?

Answer 20

len(list):

Question 21

what method would you use to add a component to a list at a required position?

Answer 21

insert():

Question 22

what method would you use to sort a list in ascending order

Answer 22

sort():

Question 23

what method would you use to remove an element at an acquired position?

Answer 23

pop():

Question 24

what would we get when we add the strings “birth” + “day” = ?

Answer 24

“birthday”

Question 25

len(“birthday”) would give you?

Answer 25

8 because that is how long the string is

Question 26

carry out the arithmetic 5**5 / 10

Answer 26

312.5

Question 27

why do we need Boolean values?

Answer 27

we want to find out if things are true or not

the computer keeps track of whether different events have happened or not