Consider classes as given below. What does o.m(3) return, assuming o has static type A and dynamic typ class A { A m(int i) { return null; } int m() { return 1; } } class B { B m(int i) { return this; } int m (A a) { return 1; } } method invocation will cause compile time error null 1 the object o O

Consider classes as given below. What does o.m(3) return, assuming o has static type A and dynamic typ class A { A m(int i) { return null; } int m() { return 1; } } class B { B m(int i) { return this; } int m (A a) { return 1; } } method invocation will cause compile time error null 1 the object o O

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

OOPs

In today's technology-driven world, computer programming skills are in high demand. The object-oriented programming (OOP) approach is very much useful while designing and maintaining software programs. Object-oriented programming (OOP) is a basic programming paradigm that almost every developer has used at some stage in their career.

Constructor

The easiest way to think of a constructor in object-oriented programming (OOP) languages is:

Question

Consider classes as given below. What does o.m(3) return, assuming o has static type A and dynamic type B?
class A {
A m(int i) { return null; }
int m() { return 1; }
}
class B {
B m(int i) { return this; }
int m(A a) { return 1; }
}
method invocation will cause compile time error
null
the object o
O 1

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