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A

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Q. What happens when delete is used for a NULL pointer?
int *ptr = NULL;
delete ptr;

(A) Compiler Error
(B) Run-time Crash
(C) No Error
(D) None

A

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Q. Which of the following is true about virtual functions in C++?

(A) Virtual functions are functions that can be overridden in derived class with the same signature.
(B) Virtual functions enable run-time polymorphism in a inheritance hierarchy.
(C) If a function is ‘virtual’ in the base class, the most-derived class implementation of the function is called according to the actual type of the object referred to, regardless of the declared type of the pointer or reference. In non-virtual f
(D) All of the above

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Q. Which of the following is true about pure virtual functions?
1) Their implementation is not provided in a class where they are declared.
2) If a class has a pure virtual function, then the class becomes abstract class and an
instance of this class cannot be created.

(A) Both 1 and 2
(B) Only 1
(C) Only 2
(D) Neither 1 nor 2

A

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Q. Which of the two features match each other?

(A) Inheritance and Encapsulation
(B) Encapsulation and Polymorphism
(C) Encapsulation and Abstraction
(D) Abstraction and Polymorphism

A

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Q. What is default access specifier for data members or member functions declared within a class without any specifier, in C++?

(A) Private
(B) Protected
(C) Public
(D) Depends on Compiler

A

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Q. If a function can perform more than 1 type of tasks, where the function name remains same, which feature of OOP is used here?

(A) Encapsulation
(B) Inheritance
(C) Polymorphism
(D) Abstraction

A

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Q. Which feature in OOP is used to allocate additional function to a predefined operator in any language?

(A) Operator Overloading
(B) Function Overloading
(C) Operator Overriding
(D) Function Overriding

A

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Q. Which among the following best defines abstraction?

(A) Hiding the implementation
(B) Showing the important data
(C) Hiding the important data
(D) Hiding the implementation and

A

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Q. A base class is also known as class.

(A) Basic
(B) Inherited
(C) Super
(D) Sub

A

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Q. If class A is derived from another derived class B which is derived from class C, which class will have maximum level of abstraction?

(A) Class A
(B) Class B
(C) Class C
(D) All have the same level of abstraction

C++ MCQs with answers Page - 119

Q. What happens when delete is used for a NULL pointer?
int *ptr = NULL;
delete ptr;

Q. Which of the following is true about virtual functions in C++?

Q. Which of the following is true about pure virtual functions?
1) Their implementation is not provided in a class where they are declared.
2) If a class has a pure virtual function, then the class becomes abstract class and an
instance of this class cannot be created.

Q. Which of the two features match each other?

Q. What is default access specifier for data members or member functions declared within a class without any specifier, in C++?

Q. If a function can perform more than 1 type of tasks, where the function name remains same, which feature of OOP is used here?

Q. Which feature in OOP is used to allocate additional function to a predefined operator in any language?

Q. Which among the following best defines abstraction?

Q. A base class is also known as class.

Q. If class A is derived from another derived class B which is derived from class C, which class will have maximum level of abstraction?

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C++ MCQs with answers Page - 119

Q. What happens when delete is used for a NULL pointer? int *ptr = NULL; delete ptr;

Q. Which of the following is true about virtual functions in C++?

Q. Which of the following is true about pure virtual functions? 1) Their implementation is not provided in a class where they are declared. 2) If a class has a pure virtual function, then the class becomes abstract class and an instance of this class cannot be created.

Q. Which of the two features match each other?

Q. What is default access specifier for data members or member functions declared within a class without any specifier, in C++?

Q. If a function can perform more than 1 type of tasks, where the function name remains same, which feature of OOP is used here?

Q. Which feature in OOP is used to allocate additional function to a predefined operator in any language?

Q. Which among the following best defines abstraction?

Q. A base class is also known as class.

Q. If class A is derived from another derived class B which is derived from class C, which class will have maximum level of abstraction?

Add MCQ in this Category

Browse Categories

Q. What happens when delete is used for a NULL pointer?
int *ptr = NULL;
delete ptr;

Q. Which of the following is true about pure virtual functions?
1) Their implementation is not provided in a class where they are declared.
2) If a class has a pure virtual function, then the class becomes abstract class and an
instance of this class cannot be created.