Object Oriented Programming MCQs

Page No. 15

Which constructor will be called from the object obj2 in the following program?


aA(int x)


bA(int y)


cA(int y, int x)


dA(int y; int x)


View Answer A(int y, int x)

Which among the following is not valid in java?


aConstructor overloading


bRecursive constructor call


cDefault value constructors


dString argument constructor



If programmer have defined parameterized constructor only, then __________________


aDefault constructor will not be created by the compiler implicitly


bDefault constructor will be created by the compiler implicitly


cDefault constructor will not be created but called at runtime


dCompile time error



Why do we use constructor overloading?


aTo use different types of constructors


bBecause it’s a feature provided


cTo initialize the object in different ways


dTo differentiate one constructor from another



Which among the following function can be used to call default constructor implicitly in java?


athis( )


bthat( )


csuper( )


d sub( )


View Answer this( )

When is the constructor called for an object?


aAs soon as overloading is required


bAs soon as class is derived


cAs soon as class is created


dAs soon as object is created



Which among the following is false for a constructor?


aConstructors doesn’t have a return value


bConstructors are always user defined


cConstructors are overloaded with different signature


dConstructors may or may not have any arguments being accepted



Which constructor will be called from the object created in the code below?


aDefault constructor


bParameterized constructor


cCompile time error


dRun time error


View Answer Compile time error

Which among the following is possible way to overload constructor?


aDefine default constructor, 1 parameter constructor and 2 parameter constructor


bDefine default constructor, zero argument constructor and 1 parameter constructor


cDefine default constructor, and 2 other parameterized constructors with same signature


dDefine 2 default constructors



Does constructor overloading include different return types for constructors to be overloaded?


aYes, if return types are different, signature becomes different


bYes, because return types can differentiate two functions


cNo, return type can’t differentiate two functions


dNo, constructors doesn’t have any return type



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