Session3 module6 7 class inheritance polymorphism

ACCP I10 SEMESTER 2
PCS – PROGRAMMING IN C#
MODULAR QUIZ
FOR
Session 03
1. Which of these statements about object-oriented programming and objects are true and
which statements are false?
A. Object-oriented programming focuses on the data-based approach.
B. An object stores its state in variables and implements its behavior through methods.
C. Classes contain objects that may or may not have a unique identity.
D. Declaration of classes involves the use of the class keyword.
E. Creating objects involves the use of the new keyword.
2. Can you match the object-oriented programming (OOP) terms against their
corresponding descriptions?
A.
Represents the behavior of an object.
B.
Represents an instance of a class.
C.
Represents the state of an object.
D.
Defines the state and behavior for all objects belonging to a particular entity.
E.
Describes an entity.
Description
 Method
 Object
 Field
 Class
3. Which of these statements about methods are true and which statements are false?
A. A static method can directly refer only to static variables of the class.

B. A method definition includes the return type as null if the method does not return any
value.
C. A method name begins with the & symbol or an underscore.
D. A static method uses the static keyword in its declaration.
E. A method declaration can specify multiple parameters to be used in the method.
4. Can you match the keywords used for access modifiers against their corresponding
descriptions?
A. Allows access to the member by all classes
B. Allows access to the members only in the same assembly
C. Allows access to the members only within the class
D. Provides the most permissive access level


E. Allows access to the base class members in the derived classes
Access modifier
 public
 internal
 private
 protected
5. Which of these statements about method overloading and the this keyword are true and
which statements are false?
A. The return types of the overloaded methods should be the same.
B. Overloaded methods should contain parameters of the same type.
C. The ref and out keywords should not be part of the signature of overloaded methods.
D. Overloaded methods should have the same method name but with different casing.
E. The this keyword is used to pass the current object as a parameter to a method.
6. Can you match the terms about constructors and destructors against their corresponding
description?
A. Initializes static data members within a class.
B. Initializes variables and is automatically invoked when an object

of a class is created.
C. Manages memory for objects.
D. Initializes variables of a class to zero.
E. Implements statements that are to be executed during the
garbage collection process.

1. Default constructor
2. Garbage collector
3. Static constructor
4. Destructor
5. Constructor

7. Which of these statements about constructors and destructors in C# are true and which
statements are false?
A. A constructor can have return types like int and void.
B. A class can have more than one constructor.
C. A static constructor can contain the public access modifier.
D. A destructor can contain the private access modifier.
E. A static constructor can refer to static variables only.
8. Can you match the terms, keywords and modifiers related to inheritance against their
corresponding descriptions?
A. Is used to invoke methods.
B. Is used to create new objects.
C. Is used to access base class members only
by the derived class.
D. Is used to execute the inherited methods
of the derived class.
E. Is used to access the constructor of the
base class.

1. new operator
2. new modifier
3. dot operator
4. base keyword
5. protected keyword


9. Which of these statements about method overriding are true and which statements are
false?
A. A method is overridden with the same name and signature as declared in the base
class.
B. A method that is overriding the method defined in the base class is preceded by the
virtual keyword.
C. A base class method is preceded with the override keyword in order to override it in
the derived class.
D. A method is known as overridden derived method when it is overridden in the derived
class.
E. A method is overridden by invoking it in the derived class.
10. Which of these statements about sealed classes are true and which statements are false?
A. The seal keyword is used to declare a class as sealed.
B. A sealed class is used to ensure security by preventing any modification to its existing
methods.
C. A sealed class is also referred to as final class in C#.
D. A sealed class is a class whose data members cannot be modified.
E. A sealed class is used to support the functioning of the virtual keyword.
11. Which of these statements about polymorphism are true and which statements are false?
A. Polymorphism supports the existence of a single class in multiple forms.
B. Polymorphism implements multiple methods with different names but with the same
signature.
C. Compile-time polymorphism allows the compiler to identify the methods to be

executed.
D. Run-time polymorphism allows you to execute overridden methods.
E. Run-time polymorphism supports methods with different signatures.


Answers
Question

Answer

1

a, b, d, e

2

A  method, B  object, C  field,
D  class, E  class
a, d, e

3

5

A  public, B  internal, C  private,
D  public, E  protected
e

6

A  3, B  5, C  2, D  1, E  4

7

b, e

8

A  3, B  1, C  5, D  2, E  4

9

a

10

b, d

11

d

4