Python Classes and objects Practice Test — Class 12 Computer Science

12th Standard Computer Science — Python Classes and objects: Online Practice Test

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Which of the following are the key features of an Object Oriented Programming language?

A.Constructor and Classes B.Constructor and Object C.Classes and Objects D.Constructor and Destructor

Functions defined inside a class are called:

A.Functions B.Module C.Methods D.section

Class members are accessed through which operator?

A.& B.. C.# D.%

Which of the following methods is automatically executed when an object is created?

A.__object__( ) B.__del__( ) C.__func__( ) D.__init__( )

A private class variable is prefixed with:

A.__ B.&& C.## D.**

Which of the following methods is used as a destructor?

A.__init__( ) B.__dest__( ) C.__rem__( ) D.__del__( )

Which of the following class declarations is correct?

A.class class_name B.class class_name<> C.class class_name: D.class class_name[ ]

What is the output of the following program? ```python class Student: def __init__(self, name): self.name=name print (self.name) S=Student("Tamil") ```

A.Error B.Tamil C.name D.self

Which of the following is a private class variable?

A.__num B.##num C.\$\$num D.&&num

Q10

The process of creating an object is called:

A.Constructor B.Destructor C.Initialize D.Instantiation

Q11

Which keyword is used to define a class in Python?

A.Class B.class C.define D.struct

Q12

What is the process of creating an object or instance of a class known as?

A.Class Initialisation B.Class Inheritance C.Class Instantiation D.Class Implementation

Q13

Which operator is used to access class variables and methods through an object in Python?

A.Arrow operator (->) B.Dot operator (.) C.Scope resolution operator (::) D.Colon operator (:)

Q14

What must be the first parameter of any method or function defined inside a Python class?

A.object B.this C.self D.init

Q15

Which special method acts as a constructor in Python classes?

A.__init__() B.__new__() C.__constructor__() D.__del__()

Q16

Which of the following correctly describes how a private member variable is declared in a Python class?

A.Prefixing the variable name with a single underscore (_) B.Prefixing the variable name with a double underscore (__) C.Suffixed with a double underscore (__) D.Declaring it under a private access specifier block

Q17

If a private variable __n2 is declared in class Sample, what happens when you try to print it directly from outside the class using object S?

A.It prints the value of __n2 successfully. B.It prints None because the variable is private. C.Python throws an AttributeError indicating the object has no such attribute. D.Python throws a NameError indicating the variable is not defined.

Q18

How are instance variables defined within a class method in Python?

A.Declared directly at the top of the class block. B.Declared inside a method using the self keyword. C.Declared using the global keyword inside a method. D.Declared without any prefix inside the constructor.

Q19

Which special method is used as a destructor in Python to destroy an object?

A.__init__() B.__destroy__() C.__del__() D.__exit__()

Q20

What is the default access control type for variables and methods defined inside a Python class?

A.Private B.Protected C.Public D.Global

Q21

Consider a class method check(self, num) that takes one parameter in its definition besides self. How many arguments are passed when it is called?

A.Zero B.One C.Two D.Three

Q22

According to Python guidelines, how should class variables be accessed when referenced inside a class method?

A.Prefixed by the class name and dot operator B.Prefixed by the global keyword C.Using the variable name directly without any prefix D.Prefixed with double dollar signs

Q23

What happens if a constructor is defined with parameters, and we instantiate the class without passing any arguments?

A.Python automatically assigns None to all parameters. B.Python raises a TypeError due to missing required positional arguments. C.Python ignores the parameters and instantiates the object successfully. D.Python prompts the user for inputs at runtime.

Q24

How can a programmer manually delete an object reference and invoke its destructor in Python?

A.Using the del keyword followed by the object name B.Calling the __del__() method directly using the object C.Setting the object equal to 0 D.Calling the close() method on the object

Q25

Which of the following is true regarding class variables and instance variables in Python?

A.Class variables have separate copies for every object, while instance variables are shared. B.Both class variables and instance variables have separate copies created for every object. C.Both class variables and instance variables are shared across all objects of the class. D.Class variables are shared by all objects of the class, while instance variables are unique to each object.

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About this Python Classes and objects test

This free online practice test covers Python Classes and objects 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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