OOP · Abstraction Mechanisms interview questions

1. A.an implicit pointer inside a non-static method referring to the object on which it was called
2. B.a class-level member shared by all objects rather than stored per instance
3. C.a virtual method declared with = 0 that forces derived classes to provide an implementation
4. D.a special method that runs when an object is created to initialize its state

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1. A.public access modifier
2. B.this pointer
3. C.friend function
4. D.constructor

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1. A.constructor — a visibility level making a member accessible from anywhere outside the class
2. B.constructor — a virtual method declared with = 0 that forces derived classes to provide an implementation
3. C.constructor — an implicit pointer inside a non-static method referring to the object on which it was called
4. D.constructor — a special method that runs when an object is created to initialize its state

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1. A.an implicit pointer inside a non-static method referring to the object on which it was called
2. B.a non-member function granted access to the private and protected members of a class
3. C.a visibility level allowing access within the class and its derived classes
4. D.a special method that runs when an object is destroyed to release its resources

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1. A.abstract class
2. B.abstract class vs interface
3. C.destructor
4. D.pure virtual function

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1. A.destructor — a special method that runs when an object is destroyed to release its resources
2. B.destructor — an abstract class can hold state and concrete methods, while an interface is a pure behavioral contract
3. C.destructor — a visibility level allowing access within the class and its derived classes
4. D.destructor — a constructor that initializes a new object as a copy of an existing object of the same class

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1. A.a visibility level restricting a member to access only within its own class
2. B.a visibility level making a member accessible from anywhere outside the class
3. C.a virtual method declared with = 0 that forces derived classes to provide an implementation
4. D.a purely abstract contract of method signatures that implementing classes must define

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1. A.abstract class vs interface
2. B.public access modifier
3. C.interface
4. D.copy constructor

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1. A.public access modifier — a non-member function granted access to the private and protected members of a class
2. B.public access modifier — an implicit pointer inside a non-static method referring to the object on which it was called
3. C.public access modifier — a visibility level making a member accessible from anywhere outside the class
4. D.public access modifier — a class that cannot be instantiated and may hold both concrete and unimplemented methods

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1. A.a visibility level restricting a member to access only within its own class
2. B.a purely abstract contract of method signatures that implementing classes must define
3. C.a visibility level allowing access within the class and its derived classes
4. D.a visibility level making a member accessible from anywhere outside the class

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1. A.private access modifier
2. B.static member
3. C.abstract class vs interface
4. D.friend function

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1. A.private access modifier — an implicit pointer inside a non-static method referring to the object on which it was called
2. B.private access modifier — a purely abstract contract of method signatures that implementing classes must define
3. C.private access modifier — a visibility level restricting a member to access only within its own class
4. D.private access modifier — a visibility level allowing access within the class and its derived classes

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1. A.a constructor that initializes a new object as a copy of an existing object of the same class
2. B.a special method that runs when an object is created to initialize its state
3. C.a visibility level allowing access within the class and its derived classes
4. D.a class-level member shared by all objects rather than stored per instance

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1. A.destructor
2. B.protected access modifier
3. C.public access modifier
4. D.pure virtual function

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1. A.protected access modifier — a visibility level allowing access within the class and its derived classes
2. B.protected access modifier — a class-level member shared by all objects rather than stored per instance
3. C.protected access modifier — a class that cannot be instantiated and may hold both concrete and unimplemented methods
4. D.protected access modifier — a non-member function granted access to the private and protected members of a class

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1. A.an abstract class can hold state and concrete methods, while an interface is a pure behavioral contract
2. B.a visibility level allowing access within the class and its derived classes
3. C.a non-member function granted access to the private and protected members of a class
4. D.a class that cannot be instantiated and may hold both concrete and unimplemented methods

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1. A.abstract class
2. B.public access modifier
3. C.destructor
4. D.friend function

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1. A.abstract class — an implicit pointer inside a non-static method referring to the object on which it was called
2. B.abstract class — a class that cannot be instantiated and may hold both concrete and unimplemented methods
3. C.abstract class — a virtual method declared with = 0 that forces derived classes to provide an implementation
4. D.abstract class — a visibility level allowing access within the class and its derived classes

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1. A.a visibility level making a member accessible from anywhere outside the class
2. B.a virtual method declared with = 0 that forces derived classes to provide an implementation
3. C.a purely abstract contract of method signatures that implementing classes must define
4. D.a visibility level restricting a member to access only within its own class

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1. A.private access modifier
2. B.constructor
3. C.interface
4. D.abstract class

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1. A.interface — a special method that runs when an object is destroyed to release its resources
2. B.interface — a purely abstract contract of method signatures that implementing classes must define
3. C.interface — a visibility level restricting a member to access only within its own class
4. D.interface — a class that cannot be instantiated and may hold both concrete and unimplemented methods

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1. A.a special method that runs when an object is destroyed to release its resources
2. B.a virtual method declared with = 0 that forces derived classes to provide an implementation
3. C.an abstract class can hold state and concrete methods, while an interface is a pure behavioral contract
4. D.a non-member function granted access to the private and protected members of a class

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1. A.protected access modifier
2. B.static member
3. C.pure virtual function
4. D.public access modifier

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1. A.pure virtual function — a virtual method declared with = 0 that forces derived classes to provide an implementation
2. B.pure virtual function — a constructor that initializes a new object as a copy of an existing object of the same class
3. C.pure virtual function — a purely abstract contract of method signatures that implementing classes must define
4. D.pure virtual function — a visibility level making a member accessible from anywhere outside the class

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1. A.a class-level member shared by all objects rather than stored per instance
2. B.a visibility level restricting a member to access only within its own class
3. C.a constructor that initializes a new object as a copy of an existing object of the same class
4. D.a visibility level making a member accessible from anywhere outside the class

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1. A.interface
2. B.this pointer
3. C.copy constructor
4. D.pure virtual function

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1. A.copy constructor — a constructor that initializes a new object as a copy of an existing object of the same class
2. B.copy constructor — an abstract class can hold state and concrete methods, while an interface is a pure behavioral contract
3. C.copy constructor — an implicit pointer inside a non-static method referring to the object on which it was called
4. D.copy constructor — a purely abstract contract of method signatures that implementing classes must define

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1. A.an abstract class can hold state and concrete methods, while an interface is a pure behavioral contract
2. B.a virtual method declared with = 0 that forces derived classes to provide an implementation
3. C.a class-level member shared by all objects rather than stored per instance
4. D.a visibility level making a member accessible from anywhere outside the class

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1. A.static member
2. B.constructor
3. C.protected access modifier
4. D.interface

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1. A.static member — a special method that runs when an object is created to initialize its state
2. B.static member — a visibility level allowing access within the class and its derived classes
3. C.static member — a class-level member shared by all objects rather than stored per instance
4. D.static member — an abstract class can hold state and concrete methods, while an interface is a pure behavioral contract

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