Week 7 Quiz

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

Consider the following nested list definition:

x = [10, [3.141, 20, [30, 'baz', 2.718]], 'foo']

A schematic for this list is shown above:

What is the expression that returns the 'z' in 'baz'?

• x[1][2][1]

• x[1][2][1][2]

• x[1][2][2]

• x[1][1][2]

Suppose you have the following tuple definition:

t = ('foo', 'bar', 'baz')

Which of the following statements replaces the second element ('bar') with the string 'qux':

• t[1] = 'qux'

• t(1) = 'qux'

• t[1:1] = 'qux'

• It’s a trick question—tuples can’t be modified.

Pick the odd one in connection with collection data type

• List

• Tuple

• Dictionary

• Loop

Which of the following function is used to count the number of elements in a list ?

• count( )

• find( )

• len( )

• index( )

Let list1=[2,4,6,8,10] the print(list1[-2]) will result in

• 10

• 8

• 4

• 6

What is the use of type( ) function in python ?

• To create a tuple

• To know the type of an element in tuple

• To know the data type of the Python object

• To create a List

If list=[10,20,30,40,50] then list[2]=35 will result

• [35,10,20,30,40,50]

• [10,20,30,40,50,35]

• [10,20,35,40,50]

• [10,35,30,40,50]

If list=[17,23,41,10] then list.append(32) will result

• [32,17,23,41,10]

• [17,23,41,10,32]

• [10,17,23,32,41]

• [41,32,23,17,10]

Which of the following python function can be used to add more than one element within an existing list ?

• append( )

• append_more( )

• extend( )

• more( )