Python Quiz

How to create a single element tuple

• (1,)

• (1)

• {1}

• [1]

• tuple([1])

Result of the program above is

• ('1', '2', '3', '4', '5')

• (1, 2, 3, 4, 5)

• 12345

• "12345"

What will be the output of the “hello” +1+2+3?

• hello123

• hello

• hello6

• Error

What will be the output of the following Python code?

print("xyyzxyzxzxyy".count('yy'))

• 2

• 0

• 5

• Error

Suppose t = (1, 2, 4, 3), which of the following is incorrect?

• print(t[3])

• t[3] = 45

• print(max(t))

• print(len(t))

What will be the output of the following Python code?

>>>t=(1,2,4,3)

>>>t[1:-1]

• (1, 2)

• (1, 2, 4)

• (2, 4)

• (2, 4, 3)

Assume the following list definition:

>>> a = ['foo', 'bar', 'baz', 'qux', 'quux', 'corge']

Several short REPL sessions are shown below. Which display correct output?

• >>> print(a[-6])

  Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

  IndexError: list index out of range

• >>> a[:] is a

  True

• >>> print(a[4::-2])

  ['quux', 'baz', 'foo']

• >>> print(a[-5:-3])

  ['bar', 'baz']

• >>> max(a[2:4] + ['grault'])

  'qux'

Which of the following are true of Python lists?

• A list may contain any type of object except another list

• A given object may appear in a list more than once

• All elements in a list must be of the same type

• These represent the same list:

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

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

• There is no conceptual limit to the size of a list

You have a list a defined as follows:

a = [1, 2, 7, 8]

Write a Python statement using slice assignment that will fill in the missing values so that a equals [1, 2, 3, 4, 5, 6, 7, 8].

• a[2:2] = [3, 4, 5, 6]

• a[1:2] = [3, 4, 5, 6]

• a[2:3] = [3, 4, 5, 6]

• a[3:5] = [3, 4, 5, 6]

Tuples in Python are mutable

• False

• True