Question 1

Question 1Why are tuples called immutable types?

Accepted Answer

Tuples are called immutable types because we cannot change elements of a tuple in place.

Question 2

Question 2What are mutable counterparts of tuple?

Accepted Answer

Lists are mutable counterparts of tuple.

Question 3

Question 3What are different ways of creating a tuple?

Accepted Answer

Tuples can be created by the following ways:By placing a sequence of values separated by comma within parentheses.Example:tup = (1, 2, 3)By placing a sequence of values separated by comma without parentheses (parentheses are optional).Example:tup = 1, 2, 3By using the built-in tuple type object (tuple( )) to create tuples from sequences as per the syntax given below:T = tuple(<sequence>)where sequence can be any type of sequence object like strings, tuples, lists, etc.Example:tup = tuple([1, 2, 3, 4])

Question 4

Question 4What values can we have in a tuple? Do they all have to be the same type*?

Accepted Answer

No, all the elements of the tuple need not be of the same type. A tuple can contain elements of all data types.

Question 5

Question 5How are individual elements of tuples accessed?

Accepted Answer

The individual elements of a tuple are accessed through their indexes given in square brackets as shown in the example below:Example:tup = ("python", "tuple", "computer")
print(tup[1])Outputtuple

Question 6

Question 6How do you create the following tuples?(a) (4, 5, 6)(b) (-2, 1, 3)(c) (-9, -8, -7, -6, -5)(d) (-9, -10, -11, -12)(e) (0, 1, 2)

Accepted Answer

(a) tup = (4, 5, 6)(b) tup = (-2, 1, 3)(c) tup = (-9, -8, -7, -6, -5)(d) tup = (-9, -10, -11, -12)(e) tup = (0, 1, 2)

Question 7

Question 7If a = (5, 4, 3, 2, 1, 0) evaluate the following expressions:(a) a[0](b) a[1](c) a[a[0]](d) a[a[-1]](e) a[a[a[a[2]+1]]]

Accepted Answer

(a) 5(b) 4(c) 0(d) 5(e) 1Explanation:The first index of tuple a is 5. Therefore, a[0] ⇒ 5The second index of tuple a is 4. Therefore,a[1] ⇒ 4a[0] represents first index of tuple a which is 5.Now the expression a[a[0]] has become a[5] which implies 0.a[-1] represents last index of tuple a which is 0.Now the expression a[a[-1]] has become a[0] which represents first element of a i.e. 5.a[2] represents third index of tuple a which is 3. Addition of 3 and 1 gives 4. Now the expression a[a[a[a[2]+1]]] has become a[a[a[4]]] where a[4] represents fifth index of tuple a i.e., 1.Now the expression a[a[a[4]]] has become a[a[1]] where a[1] represents second index of tuple a i.e., 4.Now the expression a[a[1]] has become a[4] where a[4] represents fifth index of a i.e. 1.

Question 8

Question 8Can you change an element of a sequence? What if a sequence is a dictionary? What if a sequence is a tuple?

Accepted Answer

Yes, we can change any element of a sequence in python only if the type of the sequence is mutable.Dictionary — We can change the elements of a dictionary as dictionary is a mutable sequence. For example:d = {'k1':1, 'k2':4}d['k1'] = 2Here, we are changing the value of first key-value pair of dictionary d. Now dictionary d will be : {'k1':2, 'k2':4}Tuple — We cannot change the elements of a tuple as tuple is an immutable sequence.For example:tup = (1, 2, 3, 4)tup[0] = 5The above expression will give an error.TypeError: 'tuple' object does not support item assignment

Question 9

Question 9What does a + b amount to if a and b are tuples?

Accepted Answer

Given a and b are tuples, so in this case the + operator will work as concatenation operator and join both the tuples.For example:a = (1, 2, 3)b = (4, 5, 6)c = a + bHere, c is a tuple with elements (1, 2, 3, 4, 5, 6)

Question 10

Question 10What does a * b amount to if a and b are tuples?

Accepted Answer

If a and b are tuples then a * b will throw an error since a tuple can not be multiplied to another tuple.TypeError: can't multiply sequence by non-int of type 'tuple'

Question 11

Question 11What does a + b amount to if a is a tuple and b is 5?

Accepted Answer

If a is tuple and b is 5 then a + b will raise a TypeError because it is not possible to concatenate a tuple with an integer.For example:a = (1, 2)b = 5c = a + bOutputTypeError: can only concatenate tuple (not "int") to tuple

Question 12

Question 12Is a string the same as a tuple of characters?

Accepted Answer

No, a string and a tuple of characters are not the same even though they share similar properties like immutability, concatenation, replication, etc.A few differences between them are as follows:1. in operator works differently in both of them. Below example shows this difference. Example:my_string = "Hello"     
my_tuple = ('h','e','l','l','o')    
print("el" in my_string)
print("el" in my_tuple) 
OutputTrue  
False
2. Certain functions like split( ), capitalize( ), title( ), strip( ), etc. are present only in string and not available in tuple object.

Question 13

Question 13Can you have an integer, a string, a tuple of integers and a tuple of strings in a tuple?

Accepted Answer

Yes, it is possible to have an integer, a string, a tuple of integers and a tuple of strings in a tuple because tuples can store elements of all data types.For example:tup = (1, 'python', (2, 3), ('a', 'b'))

Question 14

Question 1Tuples are immutable data types of Python.

Accepted Answer