Object Oriented Programming MCQs

Page No. 32

What will be the output of the following code?


aPoint 1: 100, 100 Point 2: 200, 200


bPoint 1: 200, 200 Point 2: 100, 100


cPoint 1: 100, 100 Point 2: 100, 100


dPoint 1: 200, 200 Point 2: 200, 200



Does use of object reference in assignment or passing means copy of the object is being used?


aNo, because the copy would create a new temporary variable


bNo, because the copy would not help to make changes to main object


cYes, because the reference directly means using address


d Yes, because the reference directly means the constructors are involved



Whenever an object is assigned to a variable or passed to a method ________________


aActually the objects aren’t used


bActually only the objects are used


cActually a pointer to an object is used


dActually copy of object is used



What is reference to an object?


a It is address of an object


bIt is address of where the variables and methods of object are stored


cIt is pointer having address of an object


d It is address of only variables and not the methods of an object



In java, ____________________ takes care of managing memory for objects dynamically.


aFree collector


bDust collector


cMemory manager


dGarbage collector


View Answer Garbage collector

Which function is called whenever an object goes out of scope?`


aDestructor function


b Constructor function


cDelete function


dFree function


View Answer Destructor function

Which of the following function can be used for dynamic memory allocation of objects?


amalloc()


bcalloc()


ccreate()


dmalloc() and calloc()


View Answer malloc() and calloc()

Using new is type safe as _______________________


aIt require to be specified with type of data


bIt doesn’t require to be specified with type of data


c It requires the name of data


d It allocated memory for the data



Is an array of characters always a string?


aYes, always


b Yes, if each character is terminated by null


cNo, since each character is terminated by null


dNo, never


View Answer No, never

Two dimensional array can’t be initialized with the declaration.


aTrue


bFalse


cA & B


dNone of these


View Answer False

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