If the following compiles, what will be displayed when main () is executed?public class Doctor {protected double billableRate = 100.0;public double getBill() {return billableRate;public class Surgeon extends Doctor(@Overridepublic double getBill() {return billableRate* 2.5;public class MedicalBillDriver(public static void displayBill( Doctor doc ) {System.out.println( doc.getBill() );public static void main( String(] args ) (Doctor physician = new Doctor (;Surgeon earSurgeon = new Surgeon ();di splayBill{ physician );di splayBill earSurgeon );100.0100.0100.0O 100.0250.0Nothing, it will not compile with passing a Surgeon object to displayBill)Nothing, it will not compile without a constructor in both the Doctor and theSurgeon classNothing, it will throw a run-time exception on the polymorphic call indisplayBill)

Doctor class has a member variable, billableRate = 100.0 with access modifier protected. That means…

If the following compiles, what will be displayed when main () is executed? public class Doctor{ protected double billableRate = 100.0; public double getBil1 () { return billableRate; public class Surgeon extends Doctor{ @Override public double getBil1(){ return billableRate * 2.5; public class MedicalBillDriver( public static void displayBill ( Doctor doc ) { System.out.println( doc.getBill (D ); public static void main( String(] args) ( Doctor physician = new Doctor(); Surgeon earSurgeon = new Surgeon (); di splayBill( physician ), di splayBill earSurgeon ); { 100.0 100.0 100.0 100.0 250.0 Nothing, it will not compile with passing a Surgeon object to displayBill() Nothing, it will not compile without a constructor in both the Doctor and the Surgeon class Nothing, it will throw a run-time exception on the polymorphic call in displayBill)

If the following compiles, what will be displayed when main () is executed? public class Doctor{ protected double billableRate = 100.0; public double getBil1 () { return billableRate; public class Surgeon extends Doctor{ @Override public double getBil1(){ return billableRate * 2.5; public class MedicalBillDriver( public static void displayBill ( Doctor doc ) { System.out.println( doc.getBill (D ); public static void main( String(] args) ( Doctor physician = new Doctor(); Surgeon earSurgeon = new Surgeon (); di splayBill( physician ), di splayBill earSurgeon ); { 100.0 100.0 100.0 100.0 250.0 Nothing, it will not compile with passing a Surgeon object to displayBill() Nothing, it will not compile without a constructor in both the Doctor and the Surgeon class Nothing, it will throw a run-time exception on the polymorphic call in displayBill)

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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2-7 Given the code below, which lines are valid and invalid.