Free Test Concepts of inheritanc... – C++ Lan...

Q1: What is inheritance in C++?

A. Mechanism to create a new class from an existing class B. Ability to overload functions C. Method of operator overloading D. Concept of encapsulation

Q2: What is single inheritance?

A. A derived class inherits from one base class B. A class inherits from multiple classes C. Base class inherits from derived class D. Class inherits from itself

Q3: How is single inheritance declared in C++?

A. class Derived : public Base {}; B. class Base : public Derived {}; C. class Derived inherits Base {}; D. class Derived extends Base {};

Q4: Which access specifier is commonly used for inheritance?

A. public B. private C. protected D. all of above

Q5: What members are inherited in single inheritance?

A. All non-private members B. Only public members C. Only protected members D. Private members only

Q6: Can constructors be inherited?

A. No, constructors are not inherited B. Yes, all constructors are inherited C. Only default constructors are inherited D. Only copy constructors are inherited

Q7: Which keyword is used to call base class constructor?

A. Base() B. base::Base() C. Base::Base() D. Derived::Base()

Q8: How do you access base class members in derived class?

A. Using scope resolution operator :: B. Using dot operator . C. Using arrow operator -> D. All of above

Q9: Can private members of base class be accessed in derived class?

A. No, private members are not accessible B. Yes, always C. Only with friend class D. Only if public inheritance

Q10: Which type of inheritance models "is-a" relationship?

A. Single inheritance B. Multiple inheritance C. Hierarchical inheritance D. Hybrid inheritance

Q11: If class B inherits class A publicly, how is A's public members treated in B?

A. Public B. Protected C. Private D. Not inherited

Q12: What is the size effect of inheritance on derived class?

A. Derived size >= Base size B. Derived size < Base size C. Derived size = 0 D. Derived size unknown

Q13: Which of these is a benefit of single inheritance?

A. Code reusability B. Security enhancement C. Faster compilation D. Automatic garbage collection

Q14: What happens if base class has virtual functions?

A. Derived class can override them B. Derived class cannot override C. Virtual functions not inherited D. Virtual functions deleted

Q15: Can a derived class add new members?

A. Yes B. No C. Only if base allows D. Only if protected inheritance

Q16: What is the default inheritance mode if none specified?

A. private B. public C. protected D. none

Q17: In single inheritance, if base class destructor is virtual, what about derived?

A. Derived destructor is also virtual B. Derived destructor not virtual C. Derived destructor is deleted D. Derived destructor is private

Q18: How does single inheritance help in polymorphism?

A. Allows overriding base functions B. Prevents object slicing C. Removes function overloading D. Enables multiple inheritance

Q19: Which keyword specifies inheritance type?

A. public, private, protected B. virtual, static C. friend, inline D. auto, register

Q20: What is the main purpose of inheritance in C++?

A. To reuse code and establish a relationship between classes B. To increase program execution speed C. To allocate memory dynamically D. To handle exceptions

Q21: In single inheritance, how many base classes does a derived class have?

A. One B. Two C. Multiple D. None

Q22: Which syntax correctly defines single inheritance?

A. class Derived : public Base {}; B. class Base : public Derived {}; C. class Derived {}; D. class Base : private Derived {};

Q23: Which access specifier in inheritance keeps the base class public members as protected?

A. protected B. private C. public D. friend

Q24: Can a derived class access private members of its base class directly?

A. No B. Yes, always C. Only if using friend class D. Only if inheritance is public

Q25: What is the effect of private inheritance?

A. All base class public and protected members become private B. All members remain public C. Derived class cannot access base members D. Base class becomes private

Q26: How does single inheritance affect object size?

A. Derived object size is greater or equal to base object size B. Derived object size is less than base object C. Derived object size is zero D. Derived object size equals zero

Q27: Which of the following is true about constructors in inheritance?

A. Constructors are not inherited but can be called B. Constructors are inherited automatically C. Base constructors are ignored D. Derived class cannot have constructors

Q28: What is the role of virtual functions in inheritance?

A. Enable runtime polymorphism B. Increase compile-time speed C. Prevent inheritance D. Control memory allocation

Q29: Which keyword is used to prevent further inheritance?

A. final B. static C. virtual D. const

Q30: In single inheritance, which of these relationships is established?

A. "is-a" B. "has-a" C. "uses-a" D. "part-of"

Q31: How does access specifier "public" affect inheritance?

A. Base public members stay public B. Base public members become private C. Base protected members become private D. Base private members become public

Q32: Can a derived class override a base class member function?

A. Yes, if base function is virtual B. No, never C. Only if function is static D. Only if function is inline

Q33: Which of these is not a valid inheritance type in C++?

A. Multilevel B. Multiple C. Multitasking D. Hierarchical

Q34: What happens if base class destructor is not virtual?

A. Derived class destructor might not be called properly B. Destructor is always virtual C. Program crashes D. Destructor is ignored

Q35: Which of the following statements is true for single inheritance?

A. Derived class inherits all accessible members of base class B. Derived class does not inherit any members C. Base class inherits derived class members D. Derived class inherits only constructors

Q36: How can a derived class call a base class function explicitly?

A. Using scope resolution operator B. Using pointer arithmetic C. Using friend function D. Using new operator

Q37: What is object slicing?

A. When derived class object is assigned to base class object B. When base class object is assigned to derived class C. When object is deleted D. When object is created

Q38: Is it possible to inherit constructors in C++11 and later?

A. Yes, using using keyword B. No, never C. Only in C++98 D. Only for destructors

Q39: Which statement is correct about base class pointer?

A. Can point to derived class objects B. Cannot point to derived class objects C. Can point only to base class D. Can only point to void

Quiz for Concepts of inheritance and types of inheritance single