Lists, Tuples, Sets and Dictionary Practice Test

12th Standard Computer Science — Lists, Tuples, Sets and Dictionary: Online Practice Test

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Pick odd one in connection with collection data type

A.List B.Tuple C.Dictionary D.Loop

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

A.10 B.8 C.4 D.6

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

A.count() B.find() C.len() D.index()

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

A.[35, 10, 20, 30, 40, 50] B.[10, 20, 30, 40, 50, 35] C.[10, 20, 35, 40, 50] D.[10, 35, 30, 40, 50]

If List=[10, 20, 30, 40, 50] then List.append(32) will result

A.[32, 10, 20, 30, 40, 50] B.[10, 20, 30, 40, 50, 32] C.[10, 20, 32, 40, 50] D.[10, 20, 30, 40, 50]

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

A.append() B.append_more() C.extend() D.more()

What will be the result of the following Python code? S=[x**2 for x in range(5)] print(S)

A.[0, 1, 2, 4, 5] B.[0, 1, 4, 9, 16] C.[0, 1, 4, 9, 25] D.[1, 4, 9, 16, 25]

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

A.To create a Tuple B.To know the type of an element in tuple. C.To know the data type of python object. D.To create a list.

Which of the following statement is not correct?

A.A list is mutable B.A tuple is immutable. C.The append() function is used to add an element. D.The extend() function is used in tuple to add elements in a list.

Q10

Let setA = {3,6,9}, setB = {1,3,9}. What will be the result of the following snippet? print(setA|setB)

A.{3,6,9,1,3,9} B.{3,9} C.{1} D.{1,3,6,9}

Q11

Which of the following set operation includes all the elements that are in two sets but not the one that are common to two sets?

A.Symmetric difference B.Difference C.Intersection D.Union

Q12

The keys in Python dictionary are specified by

A.= B.; C.+ D.:

Q13

Which of the following Python methods can be used to duplicate all items of a list into a new list without modifying the original list?

A.list.dup() B.list.copy() C.list.clone() D.list.backup()

Q14

If a Python list is defined as MyList = [2, 10, 15, 20, 10], what will be the output of MyList.index(10)?

A.1 B.4 C.0 D.2

Q15

In Python, creating a tuple with a single element is called a "Singleton" tuple. Which of the following is the correct way to define a singleton tuple with the value 50?

A.T = (50) B.T = 50 C.T = (50,) D.T = [50]

Q16

Which of the following statement is true regarding the execution speed of iterating over Tuples compared to Lists in Python?

A.Iterating lists is faster than tuples. B.Iterating tuples is faster than lists. C.Both have identical iteration speeds. D.Iterating speed depends only on the length, not the data type.

Q17

Consider the Python expression: S = [x**3 for x in range(1, 5) if x % 2 == 0]. What will be the final contents of the list S?

A.[1, 8, 27, 64] B.[8, 64] C.[1, 27] D.[2, 4]

Q18

What will be the output when the following Python code is executed? S1 = {10, 20, 30} S2 = {20, 30, 40} print(S1 ^ S2)

A.{20, 30} B.{10, 40} C.{10, 20, 30, 40} D.{10, 20, 30}

Q19

Which Python list function removes all the elements of a list but retains the empty list structure itself?

A.remove() B.pop() C.clear() D.del

Q20

What is the output of the following dictionary deletion operation? Dict = {'Reg_No': '1221', 'Name': 'Tamilselvi'} Dict.clear() print(Dict)

A.None B.{'Reg_No': '', 'Name': ''} C.{} D.NameError: name 'Dict' is not defined

Q21

Which of the following set operations is correctly paired with its corresponding Python operator?

A.Union: & B.Intersection: | C.Difference: - D.Symmetric Difference: *

Q22

If a Python list is Numbers = [10, 20, 30, 40, 50], what will be the result of the slice operation Numbers[-3:-1]?

A.[30, 40, 50] B.[30, 40] C.[20, 30, 40] D.[40, 50]

Q23

Which of the following statement is correct about dictionary keys in Python?

A.Keys must be enclosed in square brackets and can be duplicated. B.Keys can be duplicated and are case-insensitive. C.Keys must be unique, are case-sensitive, and can be of any valid Python type. D.Keys can only be integer values starting from zero.

Q24

What will be stored in x after executing the following Python code? MyTuple = (10, 20, 30) x = MyTuple + (40,)

A.(10, 20, 30, 40) B.(10, 20, 30, 40,) C.(10, 20, 30, (40,)) D.TypeError: can only concatenate tuple to tuple

Q25

Which Python function can convert a List or a Tuple into a Set, thereby eliminating duplicate elements?

A.to_set() B.set() C.unique() D.cast_set()

Q26

What is the correct output when the following Python code is run? list1 = [5] * 3 print(list1)

A.[15] B.[5, 5, 5] C.[[5], [5], [5]] D.TypeError: unsupported operand type for *

Q27

Consider the following dictionary comprehension: Dict = {x: x * x for x in range(1, 4)}. What is the value of Dict[3]?

A.3 B.6 C.9 D.1

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About this Lists, Tuples, Sets and Dictionary test

This free online practice test covers Lists, Tuples, Sets and Dictionary from the 12th Standard Computer Science (Samacheer Kalvi) syllabus. Choose the number of questions and an optional time limit, then answer and submit — everything is checked in your browser, with the correct answers and a worked explanation shown at the end. For the full solutions to every question in this set, see the solved MCQs page.

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