Object Oriented Programming MCQs

Page No. 16

Can constructors be overloaded in derived class?


aYes, always


bYes, if derived class has no constructor


cNo, programmer can’t do it


dNo, never


View Answer No, never

Which among the following best describes constructor overloading?


aDefining one constructor in each class of a program


bDefining more than one constructor in single class


cDefining more than one constructor in single class with different signature


dDefining destructor with each constructor



The destructor can be called before the constructor if required.


aTrue


bFalse


cA & B


d None of these


View Answer False

The destructors ____________


aHave a return type


bMay have a return type


cOf derived classes have return type


dDoesn’t have a return type



The constructor _____________


aHave a return type


bMay have a return type


cOf derived classes have return type


dDoesn’t have a return type



Which among the following is true for destructors?


aDestructors can be overloaded


bDestructors can be define more than one time


cDestructors can’t be overloaded


dDestructors are overloaded in derived classes



If a class have 4 constructors then it must have 4 destructors also.


aTrue


bFalse


cA & B


d None of these


View Answer False

For explicit call _________________


a The destructor must be private


bThe destructor must be public


c The destructor must be protected


dThe destructor must be defined outside the class



Number of destructors called are ____________


aAlways equal to number of constructors called


bAlways less than the number of constructors called


cAlways greater than the number of constructors called


dAlways less than or equal to number of constructors



Destructor calls ________________ (C++)


aAre only implicit


b Are only explicit


c Can be implicit or explicit


dAre made at end of program only



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