Python

Question 1

Sign to use for comments.

Answer 1

#

Question 2

Function that can help you identify a variable’s data type.

Answer 2

print(type()) which can give back <class ‘float’/‘str’/‘bool’>
ex.:x=42
print(type(x))
<class ‘int‘>

Question 3

How to write “2^3”?

Answer 3

print(2**3)

Question 4

What does % do?

Answer 4

It calculates the remainder after left/right (exemple: print(5%2) will make 1 while print(2%4) will make 2 because 4 is bigger than 2.

Question 5

How to use calculator mode?

Answer 5

print()

Question 6

Storing a value in a variable.

Answer 6

Declaration

Question 7

Whole number

Answer 7

Integer

Question 8

Numbers with decimals

Answer 8

Floats

Question 9

Non-numerical data

Answer 9

strings

Question 10

“True” and “False” variation

Answer 10

boolean

Question 11

money_in=100
print(money_in)

Answer 11

100

Question 12

money_in=100
money_out=50
profit=money_in-money_out
print(profit)

Answer 12

50

Question 13

How can you write: “I completed 3 courses!“

Answer 13

print(‘I completed‘+str(3)+‘courses!‘)

Question 14

How can you convert a string into an integer?

Answer 14

You use int()
ex.:print(int(‘2‘)+2)
4

Question 15

How can you convert a string into a float?

Answer 15

You use float()
ex.:print(float(‘2‘)+2.0)
4.0

Question 16

How can you convert objects to a boolean value?

Answer 16

You use bool()
ex.:print(bool(2), bool(0), bool(‘hello‘))
True False True

Question 17

How can you print “alright alright alright“?

Answer 17

print(‘alright‘*3)

Question 18

Adding strings together using the ‘+‘ operator.

Answer 18

Concatenation
ex.:‘Data‘+‘Camp‘
DataCamp

Question 19

What is the first element of a zero-indexing?

Answer 19

0

Question 20

How can you count backwards when selecting elements near the end of a list?

Answer 20

You use negative indexes
ex.: x=[‘h‘, ‘b‘, ‘i‘, ‘k‘]
print(x[-1])
print(x[-3])
k
b

Question 21

How can you make a list?

Answer 21

You use ‘[]‘.
l=[‘a‘, ‘b‘, ‘c‘]
print(l[0])
print(l[1])
a
b

Question 22

How can you select multiple elements from a list?

Answer 22

Slicing: l[start:end]

Question 23

What is excluded when you make a list?

Answer 23

The end index
ex.:l=[‘a‘, ‘b‘, ‘c‘, ‘d‘, ‘e‘]
print(l[1:3])
print(l[2:3])
[‘b‘, ‘c‘]
[‘c‘]

Question 24

What if I wanna take the first 2, do I need to include the index?

Answer 24

No
ex.: l=[‘a’, ‘b’, ‘c’, ‘d’, ‘e’]
print (l[:2])
print (l[2:])
[‘a’,’b’]
[‘c’, ‘d’, ‘e’]

Question 25

What is a list?

Answer 25

A collection of elements

Question 26

l=[2, 4, 6]
print(type(l))

Answer 26

<class ‘list’>

Question 27

a=1
b=a
a=2
print(b)

Answer 27

1

Question 28

a=[1, 2]
b=a
a[0]=2
print(b)

Answer 28

[2, 2]

Question 29

a=1
b=a
a=2
print(b)

Answer 29

1

Question 30

a=[1,2]
b=a[:]
c=list(a)
a[0]=2
print(a,b,c)

Answer 30

[2,2] [1,2] [1,2]

Question 31

l=[[7, 6], [8, 9], [10, 11]]
print (l[1])

Answer 31

[8, 9]

Question 32

l[[7, 6], [8,9], [10, 11]]
print(l[1][0])

Answer 32

8

Question 33

l=[[7,6], [8, 9], [10, 11]]
print(l[-1][1:])

Answer 33

11

Question 34

l=[5, 6, 4, 2]
l[2]=100
print(l)

Answer 34

[5, 6, 100, 2]

Question 35

l=[5, 6, 4, 2]
l[0:2]=[1,2]
print(l)

Answer 35

[1, 2, 4, 2]

Question 36

How to delete elements from a list?

Answer 36

You use “del()”
ex.: l=[2, 3, 6, 8, 10]
del(l[3])
print(l)
[2, 3, 6, 10]
print(l[3])
10

Question 37

How can you combine two lists?

Answer 37

Use the “+”operators.
ex.: l=[5, 8]
print(l+[1, 2])
[5, 8, 1, 2]
a=[1, 3, 5]
b=[2, 4, 6]
print(a+b)
[1, 3, 5, 2, 4, 6]

Question 38

How can you combine two lists?

Answer 38

You use “+”.
ex.: l=[5, 8]
print(l+ [1, 2])
[5, 8, 1, 2]
a=[1, 3, 5]
b=[2, 4, 6]
print(a+b)
[1, 3, 5, 2 , 4, 6]

Question 39

How can you delete elements from a list?

Answer 39

You use the “del()”function.
l=[2, 3, 6, 8, 10]
del(l[3])
print(l)
[2, 3, 6, 8, 10]
print(l[3])
10

Question 40

How can you round a float?

Answer 40

You use the “round”function.
Ex.: x= round(3.1415, 2)
print (x)
3.14

Question 41

l=[2, 3, 6, 8, 10]
del(l[3])
print(l)

Answer 41

[2, 3, 6, 10]

Question 42

How can you round a number?

Answer 42

You use the “round()”function.

Question 43

x=round(3.1415, 2)
print(x)

Answer 43

3.14

Question 44

How can you capitalize a word?

Answer 44

You use the “capitalize()”function.

Question 45

greet= “hello”
print(greet. capitalize())
print(greet)

Answer 45

Hello
hello

Question 46

How can you add an element to a list?

Answer 46

You use “.append()”function.

Question 47

l=[‘cat’, ‘rat’, ‘mat’]
l.append(‘bat’)
print(l)

Answer 47

[‘cat’, ‘rat’, ‘mat’, ‘bat’]

Question 48

How can you use a package?

Answer 48

You import it using the format “import package”.

Question 49

The “numpy”package contains code for what?

Answer 49

Array computing

Question 50

What does “array”mean in computer science?

Answer 50

Data structure consisting of a collection of elements (values or variables), of same memory size, each identified by at least one array index or key.

Question 51

How can you import numpy?

Answer 51

You write “import numby”.

Question 52

n=numpy.array([1, 2, 3])
print(n)

Answer 52

[1, 2, 3]

Question 53

How to add a name to a function?

Answer 53

You use the function “as”.

Question 54

import numpy as np
n=np.array([4, 5, 6])
print (n)

Answer 54

[4, 5, 6]

Question 55

x=round(1.356)
print(x)

Answer 55

1

Question 56

How can you sort the elements of a list in ascending order?

Answer 56

You use the “sorted()”.

Question 57

a=sorted([4, 7, 2])
print(a)

Answer 57

[2, 4, 7]