Trinity - CPP Interview Preparation Questions

C++ - QUESTIONS : PART 15

Destructor is a member function whose name is same as the class name but is preceded by a ………..

tilde

hash

dot

dollor

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A destructor is used to destroy the objects that have been created by a ………………..

object

class

function

constructor

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Whenever const objects try to invoke non-const member functions, the compiler …………………

return zero value

return null

generate error

return no value

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Allocation of memory to objects at the time of their construction is known as ……………. of objects.

run time construction

dynamic construction

initial construction

static construction

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The process of initializing through a copy constructor is known as ……………

copy process

copy registration

copy initialization

initialization process

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……………….. provides the flexibility of using different format of data at runtime depending upon the situation.

dynamic initialization

run time initialization

static initialization

variable initialization

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An ………………….. with a constructor or destructor cannot be used as a member or a union.

class

object

function

variable

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Can destuctors be private in C++?

Yes

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Like constructors, can there be more than one destructors in a class?

Yes

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Can destructors be virtual in C++?

Yes

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Which among the following is called first, automatically, whenever an object is created?

Class

Constructor

New

Trigger

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Which among the following is not a necessary condition for constructors?

Its name must be same as that of class

It must not have any return type

It must contain a definition body

It can contains arguments

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Which among the following is correct?

class student{ public: int student(){} };

class student{ public: void student (){} };

class student{ public: student{}{} };

class student{ public: student(){} };

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In which access should a constructor be defined, so that object of the class can be created in any function?

Public

Protected

Private

Any access specifier will work

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How many types of constructors are available for use in general (with respect to parameters)?

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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?

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

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

It will not create the object ( as the default constructor is not defined )

It will create the object ( as at least some constructor is defined )

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

True

False

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If class C inherits class B. And B has inherited class A. Then while creating the object of class C, what will be the sequence of constructors getting called?

Constructor of C then B, finally of A

Constructor of A then C, finally of B

Constructor of C then A, finally B

Constructor of A then B, finally C

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C++ - QUESTIONS : PART 15