An operation that alters the state of an object is known as a constructor operation.

When we call a constructor method among different given constructors. We match the suitable constructor by matching the name of constructor first, then the number and then the type of parameters to decide which constructor is to be overloaded. The process is also known as?

A

Method overriding

B

Inheritance

C

Polymorphism

D

Encapsulation

If a programmer defines a class and defines a default value parameterized constructor inside it. He has not defined any default constructor. And then he try to create the object without passing arguments, which among the following will be correct?

A

It will not create the object (as parameterized constructor is used)

B

It will create the object (as the default arguments are passed)

Default constructor must be defined, if parameterized constructor is defined and the object is to be created without arguments.

A

True

B

False

If a class have default constructor defined in private access, and one parameter constructor in protected mode, how will it be possible to create instance of object?

A

Define a constructor in public access with different signature

B

Directly create the object in the subclass

C

Directly create the object in main() function

D

Not possible

Which keyword is used to refer baseclass constructor to subclass constructor?

A

This

B

Static

C

Base

D

Extend

For constructor overloading, each constructor must differ in ___________ and __________

A

Number of arguments and type of arguments

B

Number of arguments and return type

C

Return type and type of arguments

D

Return type and definition

Copy constructor is a constructor which ________________

A

Creates an object by copying values from any other object of same class

B

Creates an object by copying values from first object created for that class

C

Creates an object by copying values from another object of another class

D

Creates an object by initializing it with another previously created object of same class

Which is a good alternative instead of having one zero argument constructor and one single argument constructor with default argument?

A

No constructor defined

B

One default value constructor

C

Defining the default constructor

D

Using one constructor with two arguments

Constructor-based DI is accomplished when the container invokes a class constructor with ____________

A

A number of arguments

B

No argument

C

Just one argument

D

Null objects

Which keyword is used to call the constructor of the superclass in a subclass constructor?

A

super

B

this

C

extends

D

constructor

An operation that alters the state of an object is known as a constructor operation.

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