int[ ] ={5,6,7,8,9} What is the value of a[3]?

8 9 7 6

Which of the following cannot be used with the keyword virtual?

constructor class destructor member functions

Which one of the following is not a valid reserved keyword in C++

Implicit Public Explicit Private

The default visibility mode while inheriting is ?

private protected public Depends

Why reference is not same as a pointer?

All of the mentioned A reference can never be null. Reference doesn't need an explicit dereferencing mechanism. A reference once established cannot be changed.