Cplusplus Programming Constructors Destructors 1 Online Exam Quiz
Cplusplus Programming Constructors Destructors 1 GK Quiz. Question and Answers related to Cplusplus Programming Constructors Destructors 1. MCQ (Multiple Choice Questions with answers about Cplusplus Programming Constructors Destructors 1
How many parameters does a default constructor require?
Options
A : 1
B : 2
C : 0
D : 3
How many types of constructors are there in C++?
Options
A : 1
B : 2
C : 3
D : 4
What is a copy constructor?
Options
A : A constructor that allows a user to move data from one object to another
B : A constructor to initialize an object with the values of another object
C : A constructor to check the whether to objects are equal or not
D : A constructor to kill other copies of a given object.
What is syntax of defining a destructor of class A?
Options
A : A(){}
B : ~A(){}
C : A::A(){}
D : ~A(){};
Why constructors are efficient instead of a function init() defined by the user to initialize the data members of an object?
Options
A : Because user may forget to call init() using that object leading segmentation fault
B : Because user may call init() more than once which leads to overwriting values
C : Because user may forget to define init() function
D : All of the mentioned
How constructors are different from other member functions of the class?
Options
A : Constructor has the same name as the class itself
B : Constructors do not return anything
C : Constructors are automatically called when an object is created
D : All of the mentioned
What happens if a user forgets to define a constructor inside a class?
Options
A : Error occurs
B : Segmentation fault
C : Objects are not created properly
D : Compiler provides a default constructor to avoid faults/errors
What is the role of a constructor in classes?
Options
A : To modify the data whenever required
B : To destroy an object
C : To initialize the data members of an object when it is created
D : To call private functions from the outer world
What is the role of destructors in Classes?
Options
A : To modify the data whenever required
B : To destroy an object when the lifetime of an object ends
C : To initialize the data members of an object when it is created
D : To call private functions from the outer world
When destructors are called?
Options
A : When a program ends
B : When a function ends
C : When a delete operator is used
D : All of the mentioned
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