Topic 1

Question 1

Python counts from

Answer 1

0

Question 2

CPU stands for… and is composed off …
It’s composed of 2 types of storage: …

Answer 2

Central processing unit
Control unit and arithmetic logic unit (ALU)
primary and secondary unit

Question 3

3 coding components

Answer 3

Sequence of instructions
Control of flow
A way to stop

Question 4

Algorithm

Answer 4

Step by step instructions on how to complete a task

Question 5

Program

Answer 5

A set of instructions represented in the form of a programming language

Question 6

int represents … and common uses are …

Answer 6

whole numbers (-2, 0, 2)
counting purposes

Question 7

float represents … and common uses are …

Answer 7

real numbers (3.14)
numeric calculations

Question 8

str represents … and common uses are …

Answer 8

sequence of characters (“hello”)
keys, input/output

Question 9

bool represents … and common uses are …

Answer 9

true or false
control flow in programs

Question 10

NoneType represents … and common uses are …

Answer 10

(None)
return type of a function that appears to not return anything

Question 11

**

Answer 11

power

Question 12

*

Answer 12

multiplication

Question 13

/

Answer 13

division

Question 14

+

Answer 14

addition

Question 15

-

Answer 15

subtraction

Question 16

%

Answer 16

modulus

Question 17

Can ints and floats be mixed in arithmetics?

Answer 17

Yes, python will automatically convert int to float if needed

Question 18

== vs =

Answer 18

== is an equality operator, compares 2 values, returns true if values are equal
= is an assignment operator, used to assign a value to a variable not compare

Question 19

!=

Answer 19

not equal to

Question 20

< / >

Answer 20

smaller / larger than

Question 21

<= / >=

Answer 21

smaller than / larger than or equal to

Question 22

== / != / < / > / <= / >= return … values

Answer 22

boolean (true / false)

Question 23

boolean operators

Answer 23

and (returns true if all values are true), or (returns true if at least 1 value is true)

Question 24

Any … of some type is evaluated to true when we use bool ()
print (bool (“Text”)) –>
print (bool (“”)) –>
print (bool (102)) –>
print (bool (0)) –>

Answer 24

non-empty or non-zero value
True
False
True
False

Question 25

Strings are ... objects

Answer 25

non-scalar

Question 26

type function is ...

Answer 26

a built in function that takes an object as input and returns what type it is (e.g. string)

Question 27

print("Apples" == "apples") --> print("Apples" < "apples”) --> print("Apples" > "apples") -->

Answer 27

False True False ASCII converts letter to numbers and A lower than a

Question 28

lexical order

Answer 28

the arrangement of a set of items with a recursive algorithm, such as the entries in a a dictionary whose order depends on their first letter unless these are the same in which case it is the second which decides, and so on

Question 29

str has a length corresponding to ...

Answer 29

the number of characters in the sequence

Question 30

the len() function ...

Answer 30

Checks the length of the function

Question 31

name = "Python" print(name[0]) print(name[1]) print(name[2]) print(name[3]) print(name[4]) print(name[5]) print("Value of name is: ", name) print("Memory ID of name is: ", id(name)) name = "C++" print("Value of name is: ", name) print("Memory ID of name is: ", id(name))

Answer 31

P y t h o n Value of name is: Python Memory ID of name is: 140487979014320 Value of name is: C++ (reassigment) Memory ID of name is: 140487979638192

Question 32

Are primitive data types (such as a string) mutable or immutable?

Answer 32

immutable

Question 33

An object is considered mutable if ... and immutable if ...

Answer 33

its state or value can be modified after it is created its value cannot be changed after it has been created

Question 34

Trying to change Hello to Hallo (e to a) str1 = "Hello" str1[1] = ”a" Would return ... because

Answer 34

TypeError: 'str' object does not support item assignment because string is immutable Would need to reassign string from Hello to Hallo Strings can"t be broken in parts

Question 35

Define helper function

Answer 35

Define helper function from pytest import approx def error_message(actual, expected): return f'Actual {actual} != Expected {expected}'

Question 36

primitive data types you bind them to a variable

Answer 36

int, float, bool, None, string

Question 37

what function accesses the memory address of an object

Answer 37

id()

Question 38

what function converts memory address to hex code

Answer 38

hex()

Question 39

what operator compares whether 2 variables point to the same memory id

Answer 39

is

Question 40

f you want to access the value of more than one index, you can use

Answer 40

[index_start : index_end] where index_start and index_end are integers Note that this will give you the values starting from index_start and until index_end - 1

Question 41

what function sorts strings by their lexical order

Answer 41

sorted()