Table of Contents
- 1 Can destructor be static?
- 2 When static variables are destroyed?
- 3 Which of the following gets called when an object is being created a Constuctor B virtual function C Destructors D Main?
- 4 What is static destructor?
- 5 Does delete call destructor?
- 6 When a derived class object is destroyed the destructors are called in the reverse order of the constructors?
- 7 How are static data members initialized and destroyed?
- 8 What is the Order of destructors in a static program?
Can destructor be static?
A destructor takes no arguments and has no return type. Its address cannot be taken. Destructors cannot be declared const , volatile , const volatile or static .
When static variables are destroyed?
Static objects are declared with the keyword static. They are initialized only once and stored in the static storage area. The static objects are only destroyed when the program terminates i.e. they live until program termination.
Is destructor always called?
The default destructor calls the destructors of the base class and members of the derived class. The destructors of base classes and members are called in the reverse order of the completion of their constructor: The destructor for a class object is called before destructors for members and bases are called.
What happens when destructor is called in C++?
A destructor is called for a class object when that object passes out of scope or is explicitly deleted. A destructor takes no arguments and has no return type. Its address cannot be taken. Destructors cannot be declared const , volatile , const volatile or static .
Which of the following gets called when an object is being created a Constuctor B virtual function C Destructors D Main?
Explanation: Virtual Function gets called when an object is being created. Explanation: Destructor has a same name as the constructor and it is preceded by ~.
What is static destructor?
A static destructor supposedly would run at the end of execution of a process. When a process dies, all memory/handles associated with it will get released by the operating system.
What is constructor and destructor?
Constructors are special class functions which performs initialization of every object. The Compiler calls the Constructor whenever an object is created. Constructors initialize values to object members after storage is allocated to the object. Whereas, Destructor on the other hand is used to destroy the class object.
Which of the following variable is destroyed only when program is terminated?
static object are initialized only once and live until the program terminates. Local object is created each time its declaration is encountered in the execution of program.
Does delete call destructor?
Yes, the destructor will be called for all objects in the array when using delete[] .
When a derived class object is destroyed the destructors are called in the reverse order of the constructors?
When the derived-class object is destroyed, the destructors are called in the reverse order of the constructors—first the derived-class destructor is called, then the base-class destructor is called. A class may be derived from more than one base class; such derivation is called multiple inheritance.
What is constructor and destructor in C Plus Plus?
Is it possible to destruct a class with a static member?
Of course not. First of all, you’ve defined an explicit empty destructor. And if the default destructor did that, you could never destruct instances without risking making the class unusable. A static data member is not part of the subobjects of a class.
How are static data members initialized and destroyed?
Static data members are initialized and destroyed exactly like non-local objects. Objects with a static lifetime will be destructed when the application terminates. Among the various static objects that might be in the program, the destructors are called in the reverse order of how the objects were constructed.
What is the Order of destructors in a static program?
Among the various static objects that might be in the program, the destructors are called in the reverse order of how the objects were constructed. The construction/destruction of object instances has no effect on when a static member is constructed or destroyed.
Will delete PB call the destructor for static member a?
When I call delete pB, B’s destructor will be called. Will this then call the destructor for static member A? The keyword static means that the variable is independent of instances. That’s why you can access static variables and methods without instantiating an object from the class in the first place.