Object Oriented Programming MCQs

Page No. 87

Delete operator _________________


aCan be used on pointers with null value

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b Can be used on pointers with void value

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cCan be used on pointer with value 0

✓


dCan be used on pointer with any value

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If delete is used to delete an object which was not allocated using new _______________


a Then out of memory error arises

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bThen unreachable code error arises

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cThen unpredictable errors may arise

✓


dThen undefined variable error arises

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Which type of value has resulted from the delete operator?


avoid

✓


b void pointer

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cnull pointer

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dnull

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View Answer void

Does delete return any value?


aYes, positive value

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bYes, negative value

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cYes, zero value

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d No

✓


View Answer No

If an object is allocated using new operator ____________


at should be deleted using delete operator

✓


bIt can’t be deleted using delete operator

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cIt may or may not be deleted using delete operator

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dThe delete operator is not applicable

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What is a delete operator?


aDeallocates a block of memory

✓


bDeallocates whole program memory

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c Deallocates only primitive data memory

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d Deallocates all the data reserved for a class

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How are automatic variables different from the instance variables?


aAutomatic variables are initialized automatically but instances are not

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bAutomatic variables are given zero values initially and not instances

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cInstance variables have to be initialized explicitly and automatic implicitly

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dInstance variables are initialized implicitly while automatic are not

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In Perl, using which operator are the local variables created?


aDot

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bArrow

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cScope resolution

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dmy

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View Answer my

Which error is produced if the automatic variables are used without declaration?


a Undefined symbol

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bMemory error

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cType mismatch

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dStatement missing

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View Answer Undefined symbol

The automatic variables _________________________


aMust be declared after its use

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bMust be declared before using

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cMust be declared, can be anytime

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dMust not be initialized

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