Object Oriented Programming MCQs

Page No. 31

In how many ways can an object be passed to a function?


a1

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b 2

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c3

✓


d4

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View Answer 3

Can reference to an object be returned from a method?


aYes, always possible

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bYes, but not always

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c No, never possible

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dNo, Not possible because referred element would be destroyed

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View Answer Yes, but not always

Invoking a method on a particular object is ____________ sending a message to that object.


aDifferent from

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bSame as

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cSomewhat similar

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dPart of

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View Answer Same as

Java handles memory dynamically and references are deleted as soon as they are out of scope.


aTrue

✓


bFalse

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cA & B

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dNone of these

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View Answer True

How many objects can be referenced from the same variables?


a One at a time

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bMany at a time

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cMany using array name

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d7 at max at same time

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View Answer One at a time

How to refer to method of nested class?


aenclosingClassObject.innerClassObject.method();

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b innerClassObject.method();

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cmethod();

✓


depends on where the method is being called

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View Answer method();

Which of the members are referred by this pointer usually (Java)?


aMembers of class where this is used

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bMember of the parent class where this is used

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cMembers that are passed as argument to the object

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d Pointers are not applicable in java

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If a reference variable is declared final then _________________


aIt can never be reassigned to refer to a different object

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bIt can be assigned to refer to any object anytime

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cIt can never be assigned with any object

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dIt can be assigned with 2 or more objects simultaneously

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Can a super class object give reference to a subclass method?


aNo, it is not possible

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bMaybe, it is possible

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cNo, it’s not possible

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dNo, It’s not possible in few cases only

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Is there any explicit use of pointers in java that would be applicable to objects?


aYes, we use reference for this purpose

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bYes, we use java arrays for this purpose

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cNo, implicit pointing is possible

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dNo, direct class names should be used

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