Python Concepts/Quizzes/Basic data types

1

With the following Python code

>>> "Hello" + 'World' + """!"""

the following applies:

True	False
		Single, double and 3 quotation marks all define a string
		3 strings are concatenated
		3 double quotation marks enable you to write a string spanning multiple lines.
		There is an error

2

The following Python code

>>> [1, 2, 'stock', 4]

constructs a

	Set
	List
	An error as there cannot be different data types in such a data structure
	Dictionary

3

The following Python code

>>> colors = ('red', 'yellow', 'blue', 'black')

is a

	Set
	Dictionary
	List
	Tuple

4

The following Python code

>>> {'stock': 'NVO', 'wikipedia': 'Novo_Nordisk'}

is a

	Set
	Array
	Named array
	Dictionary

5

The following Python code

>>> a = [[4, 5], [6, 7], [8, 9]]

may result in

a[1]	type(a)	a[2][2]	a(2,2)
				<type 'list'>
				4
				[6, 7]
				[4, 5]
				Error
				Other result

6

The following Python code

>>> c = {'stock': 'NVO', 'wikipedia': 'Novo_Nordisk'}

may result in

c.keys()	c.items()	c.values()
			['wikipedia', 'stock']
			['Novo_Nordisk', 'NVO']
			[('wikipedia', 'Novo_Nordisk'), ('stock', 'NVO')]
			{'stock', 'wikipedia'}

7

The following Python code

>>> a = range(5)
>>> b = a
>>> a[3] = 77

results in

	b = [0, 1, 2, 3, 4]
	b = [1, 2, 3, 4, 5]
	b = [0, 1, 2, 3, 4, 5]
	b = [0, 1, 2, 77, 4]
	b = [1, 2, 3, 77, 5]
	b = [0, 1, 2, 77, 4, 5]
	b = [0, 1, 77, 3, 4]
	b = [1, 2, 77, 4, 5]
	b = [0, 1, 77, 3, 4, 5]

8

The following Python code

>>> 'Result: ' + 23

results in

	A string where the arguments are concatenated: 'Result: 23'
	31
	An error as you cannot append an integer on a string
	A list: ['Results: ', 23]

9

To append a string and an integer

Ok	Errors
		'Result: ' + 23
		'Result: ' + str(23)
		'Result: %d' % 23
		sprintf('Result: %d', 23)
		'Result: {result}'.format(**{'result': 23})

10

Consider the following data structure definition:

>>> names = {1: 'Anders', 2: "Bente", 3: "Charles"}

True	False
		You can only have strings as keys in Python dictionaries
		You can get the "Bente" value with names[2]
		You can get the "Bente" value with names{2}
		If you do "for name in names: print(name)" the names will be printed
		If you do "for key, value in names: print(value)" the names will be printed
		If you do "for key, value in names.items(): print(value)" the names will be printed