List, dictionary and tuple

1. Examples for list data type

• [1,2,3,4,5]

• ['S','H','R','U','T','H','I']

• {1:"a",2:"b",3:"c",7:"d"}

• ('A','B','C','D')

What’s the main difference between Python lists and tuples?

• Lists can hold any data type and tuples can only contain int and str objects.

• Lists are immutable and tuples are mutable.

• Lists are mutable and tuples are immutable.

• Lists are faster and tuples are slower.

  Check Your Answer »

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

• count( )

• find( )

• len( )

• index( )

Which of the following statement is not correct

• A list is mutable

• A tuple is immutable

• The append function is used to add an element

• The extend function is used in tuples to add elements in a list

Suppose d = {“john”:40, “peter”:45}, what happens when we try to retrieve a value using the expression d[“susan”]?

• Since “susan” is not a value in the set, Python raises a KeyError exception

• It is executed fine and no exception is raised, and it returns None

• Since “susan” is not a key in the set, Python raises a KeyError exception

• Since “susan” is not a key in the set, Python raises a syntax error

Which of these pieces of code would return the name "Harry" from the following list?

nameList = ["John", "Harry", "Jesse", "John", "Harry", "Harry"]

• nameList()

• nameList[1]

• NameList(4)

• nameList["4"]

List items have an index number. In the following list, which item has the index number of 3?

["John", "Harry", "Jesse", "John", "Harry", "Harry"]

• "John"

• "Harry"

• "Jesse"

Which one of the following statements is incorrect?

• Tuples are a bit like Lists, but the items inside them can be changed.

• Once a tuple is set up it always stays the same.

• A tuple contains items separated by commas and surrounded by brackets.

• Tuples are useful to collect several bits of the data together.

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]