Quick Answer: Which Of The Following Gives The Correct Count Of The Constructors That A Class Can Define?

Which of the following is the correct about class constructor?

Q 18 – Which of the following is the correct about class constructor.

A – A class constructor is a special member function of a class that is executed whenever we create new objects of that class.

B – A constructor has exactly the same name as that of class and it does not have any return type..

Which is the correct statement for default constructor?

Which is the correct statement for default constructors? Explanation: The closest answer to the question is that a default constructor is a constructor with zero arguments.

What is the first statement of a default constructor?

Calling the constructor for the superclass must be the first statement in the body of a constructor. If you are satisfied with the default constructor in the superclass, there is no need to make a call to it because it will be supplied automatically.

What is true constructor?

What is true about constructor? Explanation: Constructor returns a new object with variables defined as in the class. Instance variables are newly created and only one copy of static variables are created. … Explanation: No instance can be created of abstract class.

Which of the following statement is correct about destructor?

Correct Answer A destructor has no return type.

What is the return type of constructors Mcq?

1. What is the return type of Constructors? Explanation: Constructors does not have any return type, not even void.

How many default constructors can a class have?

one default constructorA class can only have one default constructor.

How many times a constructor is called?

How many times can a constructor be called during lifetime of the object? As many times as we call it. Only once.

Can a class have virtual destructor?

Destructors in the Base class can be Virtual. Whenever Upcasting is done, Destructors of the Base class must be made virtual for proper destrucstion of the object when the program exits. NOTE: Constructors are never Virtual, only Destructors can be Virtual.

How many constructors can a class define?

You can have 65535 constructors in a class(According to Oracle docs). But IMPORTANTLY keep this in your mind. We achieve this only by CONSTRUCTOR OVERLOADING ( https://beginnersbook.com/2013/05/constructor-overloading/ ). You can create many constructors but with different signatures.

Which of the following statement is correct a constructor is called?

Which of the following statement is correct? A constructor is called at the time of declaration of an object. A constructor is called at the time of use of an object. A constructor is called at the time of declaration of a class.

Can a class have multiple constructors?

There can be multiple constructors in a class. However, the parameter list of the constructors should not be same. This is known as constructor overloading.

Why constructor has no return type?

So the reason the constructor doesn’t return a value is because it’s not called directly by your code, it’s called by the memory allocation and object initialization code in the runtime. Its return value (if it actually has one when compiled down to machine code) is opaque to the user – therefore, you can’t specify it.

What is constructor and its types?

A constructor is a special type of function with no return type. Name of constructor should be same as the name of the class. We define a method inside the class and constructor is also defined inside a class. A constructor is called automatically when we create an object of a class.

What is Constructor with example?

When a class or struct is created, its constructor is called. Constructors have the same name as the class or struct, and they usually initialize the data members of the new object. In the following example, a class named Taxi is defined by using a simple constructor. … For more information, see Instance Constructors.

How many default constructors can a class have quizlet?

It is not possible to have more than one default constructor.

What type of value does sizeof return?

When sizeof() is used with the data types, it simply returns the amount of memory allocated to that data type. The output can be different on different machines like a 32-bit system can show different output while a 64-bit system can show different of same data types.

What are the ways in which a constructor can be called?

The constructors can be called explicitly or implicitly. The method of calling the constructor implicitly is also called the shorthand method. If we want to initialize fields of the class with your own values, then use a parameterized constructor.

Which type of constructor can’t have a return type?

No, constructor does not have any return type in Java. Constructor looks like method but it is not. It does not have a return type and its name is same as the class name. Mostly it is used to instantiate the instance variables of a class.

Why is the customer called a co constructor?

Explanation: It is called when an instance of the class is created. … It is because java compiler creates a default constructor if your class doesn’t have any.

Can constructor be private?

Yes, we can declare a constructor as private. If we declare a constructor as private we are not able to create an object of a class. We can use this private constructor in the Singleton Design Pattern.