Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A: We can build an object from a class containing a pure virtual function. Reason R: A class containing a pure virtual function is called an abstract class. In the light of the above statements, choose the most appropriate answer from the options given below
C++ Pure Virtual Function and Abstract Class Rules
This question concerns object-oriented programming concepts in C++, specifically focusing on pure virtual functions and abstract classes.
Assertion A Analysis
Assertion A states that an object can be built from a class containing a pure virtual function.
- A pure virtual function is declared in a base class using the syntax $virtual void func() = 0;$.
- A class that contains one or more pure virtual functions is called an abstract class.
- Abstract classes are designed to be base classes for other classes and cannot be instantiated directly. You cannot create objects of an abstract class type.
- Therefore, Assertion A is incorrect.
Reason R Analysis
Reason R states that a class containing a pure virtual function is called an abstract class.
- This is the standard definition of an abstract class in C++.
- The presence of at least one pure virtual function forces the class to be abstract, meaning it cannot be instantiated.
- Therefore, Reason R is correct.
Conclusion
Based on the analysis, Assertion A is incorrect, while Reason R is correct. This aligns with the choice stating that A is incorrect but R is correct.
Important Questions from Assertions and Reasons
In this question, two statements are given – one labeled as Assertion (A) and the other labeled as Reason (R) respectively. Assuming that all the information given in the assertion is true, analyze both the reasons along with it and decide which of them is/are correct and whether R is the correct description of A.
Assertion: Oral polio vaccine should be given to all children below the age of 5 years; But children over the age of 5 do not need to take the dose.
Reason: In India, almost all complications of poliomyelitis are found in children below the age of 5.
For the Assertion (A) and Reason (R) given below, choose the correct option from the following :
Assertion (A): Buddhism considers suicide as the best way to attain salvation.
Reason (R): Buddhism claims that the world is full of sorrow and pain.
In the question given below, two statements are marked as Assertion (A) and Reason (R). Mark your answer according to the code given in the alternatives.
Assertion (A) : There has been a huge loss of property in Japan last year.
Reason (R) : Japan was hit by Tsunami last year.
In the question given below, there are two statements marked as Assertion (A) and Reason (R). Mark your answer as per the codes in options.
Assertion (A): Iron rusts when exposed to water.
Reason (R): Iron reacts with the oxygen molecules present in water.
An assertion (A) and a reason (R) are given below.
Assertion (A): Forest cover in the country has gradually decreased.
Reason (R): Encroachment by humans is one of the concerns for the forest department.
Choose the correct option.
A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true, but R is not the correct explanation of A
C. A is true, but R is false
D. A is false, but R is true
