Q1) What is the o/p of following program? public class Widening1 { public void f1(Object o1) { System.out.println("Inside f1 with object as argument"); } public void f1(String s) { System.out.println("Inside f1 with String as argument"); } public static void main(String[] args) { new Widening1().f1(null); } } Answers a) Inside f1 with String as argument b) Inside f1 with object as argument c) Compilation error d) Runtime error

Q1) What is the o/p of following program? public class Widening1 { public void f1(Object o1) { System.out.println("Inside f1 with object as argument"); } public void f1(String s) { System.out.println("Inside f1 with String as argument"); } public static void main(String[] args) { new Widening1().f1(null); } } Answers a) Inside f1 with String as argument b) Inside f1 with object as argument c) Compilation error d) Runtime error

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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1 class MetOv{ 2- void sum(int i, int j){ 3 System.out.println(i); } 4 void sum(String c,String d){ 5 System.out.println(c+d); } 6- void sum(double x,double y){ 7 System.out.println(x+y); 8 }} 9 10 - public class Run{ 11 public static void main(String[] args) 12- { 13 Metov a=new Metov (); 14 a.sum("JA","VA"); 15 a.sum(5.0,10.e); 4. 16 17 }} Answer:
a.Turkeys of Thanksgiving coming! b.Thanksgiving coming! c.Thanksgiving of Turkeys d.None of the above
using System; class main { publicstaticvoid Main(string[] args) { Random r = new Random(); int randNo= r.Next(1,11); Console.Write("Hi, my name is Stevie. I am thinking of a number from 1 to 10.\nGuess which number I am thinking of? "); int guess = Convert.ToInt32(Console.ReadLine()); if (guess == randNo) { Console.WriteLine("You guessed correctly!"); } else { Console.WriteLine("I was thinking of the number "+randNo+"\nSorry! Play again."); } } } this is a guessing game program for a random number between 1-10 in C#. how can code be added to tell you if your guess is too high or too low from the chosen random number?
Consider the following piece of code. (The numbers on the left margin denote line numbers.) line#01 public class funcRef {02 private int n;03 public funcRef (int m) {n = m;}04 public static void func (funcRef t) {t.n++;}05 public static void main (String [] args) {06 funcRef t1, t2;07 t1 = new funcRef(20);08 t2 = t1;09 System.out.print(t2.n);10 func(t1);11 System.out.print(t2.n);12 func(t1);13 System.out.print(t1.n);14 func(t2);15 System.out.print(t1.n);16 func(t2);17 System.out.print(t1.n);18 System.out.print(t1.n);19 return;20 }21 } Out of the following, tick the true statements and leave the false statements unticked.(More than one of the statements could be true. You get full marks only for marking all the statements correctly. There are no partial marks.) A. The output of the program will be 202022222222. B. When func(t1) is called in line…
2-7 Given the code below, which lines are valid and invalid.
2- Trace the following code and write the output: class Test1 { Test1(int x) { System.out.println("Test Calls " + x); class Test2 { Testi t1 = new Test1(10); Test2(int i) { t1 = new Test1(i); } public static void main(String[] args) { Test2 t2 = new Test2(5);
Question 7 Analyze the following code. // Program 1: public class Test{ public static void main(String[] args) { Object a1 = new A0); Object a 2 = new A0); System.out.println(a1.equals(a2)); } } class A { int x; public boolean equals(Object a) { = ((A)a).x; return this.x == } } // Program 2 public class Test{ public static void main(String[] args) { Object a 1 = new A0); Object a 2 = new A0); System.out.println(a1.equals(a2)); } class A { int x; public boolean equals(A a) { return this.x == a.x; } } Program 1 displays true and Program 2 displays true Program 1 displays false and Program 2 displays true Program 1 displays true and Program 2 displays false O Program 1 displays false and Program 2 displays false
public class Test { public static void main(String[] args) { int count = 1; while (count < 10) { } } } System.out.print(count % 2 ++count; // end while // end main == 1 ? "X" : "Y");
Explain how the given program works. using System; class Program{ static void Main() { string text = "civic"; string reverse = ""; bool result; for(int x = text.Length - 1; x >= 0; x--){ reverse = reverse + text[x]; } result = text.Equals(reverse, StringComparison.CurrentCultureIgnoreCase) ? true:false; Console.WriteLine("Given text: {0}", text); Console.WriteLine("Reverse text: {0}", reverse); Console.WriteLine("Result: {0}", result); }}
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Consider the following code:Which one of the following is true public class Main { String name; public void disp() { System.out.printin("Its education system"); } public static class school extends Main { static void dsip() { System.out.printIn("Its school education system"); } } public static void main(String[] args) throws Exception { school s= new school(); s.disp(); } } It prints " Its education system" It prints " its school education system" Error None of the above