Object Oriented Programming MCQs

Page No. 21

Which among the following is correct to call a private member from outside the class?


aobject.memberfunction( parameters );

✖


bobject->memberfunction( parameters );

✖


c object->memberfunction( parameteres); or object.memberfunction( parameters );

✖


dNot possible

✓


View Answer Not possible

If a function has to be called only by using other member functions of the class, what should be the access specifier used for that function?


aPrivate

✓


bProtected

✖


cPublic

✖


dDefault

✖


View Answer Private

If a class have default constructor defined in private access, and one parameter constructor in protected mode, how will it be possible to create instance of object?


aDefine a constructor in public access with different signature

✓


bDirectly create the object in the subclass

✖


cDirectly create the object in main() function

✖


dNot possible

✖


View Answer Define a constructor in public access with different signature

. Protected access is same as default access that is given implicitly in java if no specifier is mentioned.


aTrue

✖


bFalse

✓


cA & B

✖


d None of these

✖


View Answer False

Which among the following can use protected access specifier?


aMembers which may be used in other packages

✖


bMembers which have to be secure and should be used by other packages/subclass

✓


cMembers which have to be accessed from anywhere in the program

✖


dMembers which have to be as secure as private but can be used by main() function

✖


View Answer Members which have to be secure and should be used by other packages/subclass

If protected members are to be accessed from outside the class then__________


aMembers must be inherited publicly in subclass

✖


bMembers must accessed using class pointers

✖


cMembers must be accessed as usual

✖


dMembers must be made public

✓


View Answer Members must be made public

If protected inheritance is used then _____


aPublic members become public in subclass

✖


bProtected members become public in subclass

✖


cProtected members become protected in subclass

✖


dProtected and Public members become protected in subclass

✓


View Answer Protected and Public members become protected in subclass

If all the members are defined in protected specifier then? (Constructors not considered)


aInstance of class can’t be created

✖


bInstance of class can be created anywhere

✓


cInstance of class can be created only in subclasses

✖


dInstance of class can be created only in main() function

✖


View Answer Instance of class can be created anywhere

Protected members differ from default members as _______


aProtected members can be accessed outside package using inheritance, but default can’t

✓


bDefault members can be accessed outside package using inheritance, but protected can’t

✖


cProtected members are allowed for inheritance but Default members are not allowed

✖


dBoth are same

✖


View Answer Protected members can be accessed outside package using inheritance, but default can’t

If the protected members are to be made accessible only to the nearest subclass and no further subclasses, which access specifier should be used in inheritance?


aThe sub class should inherit the parent class privately

✓


bThe sub class should inherit the parent class as protected

✖


cThe sub class should inherit the parent class as public

✖


dThe sub class can use any access modifier

✖


View Answer The sub class should inherit the parent class privately

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