Python

Question 1

Where is the python interpreter usually installed?

Answer 1

The Python interpreter is usually installed as /usr/local/bin/python3.4 file path.

Question 2

How do you set the python interpreter path to C:\python3.4

Answer 2

set path=%path%;C:\python3.4

Question 3

When inside the python terminal, how do you quit?

Answer 3

quit()

Question 4

How do you start a comment in python?

Answer 4

#

Question 5

What are the symbols of add, subtract, multiply, divide and remainder in python?

Answer 5

+, -, *, /, and %

Question 6

Just as in BODMAS, python respects parenthesis.
which will be treated first: (50 - 5*6) / 4 ?

Answer 6

The Multiplication in the bracket, followed by the subtraction and the total will be divided by 4

Question 7

5 ** 2 ?

Answer 7

25

Question 8

> > > width = 20
height = 5 * 2
width * height

Answer 8

200

Question 9

How do you escape single quotes in ‘doesn’t’ ? to give “doesn’t”

Answer 9

‘doesn't’

Question 10

s = ‘First line.\nSecond line.’ without print(), produces what?

Answer 10

‘First line.\nSecond line.’

Question 11

s = ‘First line.\nSecond line.’ with print(s), produces what?

Answer 11

First line.
Second line.

Question 12

What does r in print(r’C:\some\name’) does?

Answer 12

If you don’t want characters prefaced by \ to be interpreted as special characters, you can use raw strings by adding an r before the first quote
output: C:\some\name

Question 13

String Literals allow multi-line comments, how do you write them?

Answer 13

”””\
Usage: thingy [OPTIONS]
-h Display this usage message
-H hostname Hostname to connect to
“””

Question 14

3 * ‘un’ + ‘ium’ produces?

Answer 14

‘unununium’
# 3 times ‘un’, followed by ‘ium’

Question 15

‘Py’ ‘thon’ returns what?

Answer 15

‘Python’ because of the string literal. A variable and a string literal would not work

Question 16

A variable text with a string literal in parenthesis:
text = (‘Put several strings within parentheses ‘
‘to have them joined together.’), returns what?

Answer 16

‘Put several strings within parentheses to have them joined together.’

Question 17

word = ‘Python’
word[0] # character in position 0
Returns what?

Answer 17

‘P’

Question 18

word = ‘Python’
word[5] # character in position 5
Returns what?

Answer 18

‘n’

Question 19

word = ‘Python’
word[-1] # last character
Returns what?

Answer 19

‘n’

Question 20

word = ‘Python’
word[-2] # second-last character
Returns what?

Answer 20

‘o’

Question 21

word = ‘Python’
word[-6]
Returns what?

Answer 21

‘P’

Question 22

word = ‘Python’
word[0:2] # characters from position 0 (included) to 2 (excluded)
Returns what?

Answer 22

‘Py’

Question 23

word = ‘Python’
word[2:5] # characters from position 2 (included) to 5 (excluded)
Returns what?

Answer 23

‘tho’

Question 24

s[:i] + s[i:] = s
word = ‘Python’
word[:2] + word[2:]
Returns what?

Answer 24

‘Python’

Question 25

word = 'Python' word[:4] + word[4:] Returns what?

Answer 25

'Python'

Question 26

One way to remember how slices work is to think of the indices as pointing between characters, with the left edge of the first character numbered 0. Then the right edge of the last character of a string of n characters has index n. Draw a diagram using 'Python' sliced

Answer 26

+---+---+---+---+---+---+ | P | y | t | h | o | n | +---+---+---+---+---+---+ 0 1 2 3 4 5 6 -6 -5 -4 -3 -2 -1

Question 27

'J' + word[1:] changes what letter in 'Python' ?

Answer 27

'Jython'

Question 28

word[0] = 'J' What does this give you?

Answer 28

TypeError: 'str' object does not support item assignment

Question 29

word[2:] = 'py' What does this give you?

Answer 29

TypeError: 'str' object does not support item assignment

Question 30

word[:2] + 'py' changes what letter in 'Python' ?

Answer 30

'Pypy'

Question 31

s = 'supercalifragilisticexpialidocious' Output: 34 How do we get this?

Answer 31

len(s)

Question 32

>>> squares = [1, 4, 9, 16, 25] >>> squares Output?

Answer 32

[1, 4, 9, 16, 25]

Question 33

>>> squares = [1, 4, 9, 16, 25] squares[0] # indexing returns the item Output?

Answer 33

1

Question 34

>>> squares = [1, 4, 9, 16, 25] >>> squares[-1] Output?

Answer 34

25

Question 35

>>> squares = [1, 4, 9, 16, 25] >>> squares[-3] Output?

Answer 35

[9, 16, 25]

Question 36

>>> squares = [1, 4, 9, 16, 25] >>> squares[:] Output?

Answer 36

[1, 4, 9, 16, 25]

Question 37

>>> squares = [1, 4, 9, 16, 25] squares + [36, 49, 64, 81, 100] Output?

Answer 37

[1, 4, 9, 16, 25, 36, 49, 64, 81, 100]

Question 38

>>> cubes = [1, 8, 27, 65, 125] # something's wrong here >>> 4 ** 3 # the cube of 4 is 64, not 65! Correct this!

Answer 38

cubes[3] = 64 # replace the wrong value >>> cubes [1, 8, 27, 64, 125]

Question 39

>>> cubes = [1, 8, 27, 65, 125, , ] Missing Values, what happened? Output = [1, 8, 27, 64, 125, 216, 343]

Answer 39

>>> cubes.append(216) # add the cube of 6 >>> cubes.append(7 ** 3) # and the cube of 7 >>> cubes [1, 8, 27, 64, 125, 216, 343]

Question 40

>>> letters = ['a', 'b', 'c', 'd', 'e', 'f', 'g'] >>> letters ['a', 'b', 'c', 'd', 'e', 'f', 'g'] >>> # replace some values >>> letters[2:5] = ['C', 'D', 'E'] >>> letters Output?

Answer 40

Output = ['a', 'b', 'C', 'D', 'E', 'f', 'g']

Question 41

['a', 'b', 'C', 'D', 'E', 'f', 'g'] >>> # now remove them >>> letters[2:5] = [] >>> letters Output?

Answer 41

Output = ['a', 'b', 'f', 'g']

Question 42

>>> letters = ['a', 'b', 'c', 'd', 'e', 'f', 'g'] >>> letters[:] = [] >>> letters output?

Answer 42

[]

Question 43

>>> letters = ['a', 'b', 'c', 'd'] >>> len(letters)

Answer 43

4

Question 44

>>> a = ['a', 'b', 'c'] >>> n = [1, 2, 3] >>> x = [a, n] >>> x What is x?

Answer 44

x = [['a', 'b', 'c'], [1, 2, 3]]

Question 45

>>> a = ['a', 'b', 'c'] >>> n = [1, 2, 3] >>> x = [a, n] >>> x[0] Output?

Answer 45

['a', 'b', 'c']