JAVA – Telegram

JAVA

class Parent{
public int index=1;
}
public class Program extends Parent
{
public Program(int index){
index=index;
}
public static void main(String[] args) {
Program p=new Program(10);
System.out.println(p.index);
}
}

189 views09:55

JAVA

Options for above program

Anonymous Quiz

25 voters194 views09:56

JAVA

public class Program
{
int val;
public Program(int _val){
val=_val;
}
public static void main(String[] args) {
Program p=new Program();
Program p=new Program(10);
}
}

200 views17:23

JAVA

Options for above program

Anonymous Quiz

35%

Compilation error due to missing default constructor

20%

Compilation error due to constructor having a return type

35%

Compilation error due to missing parameterized constructor

10%

No Compilation Error. Object a has Val value of 0(zero) while object b has val value of 20

20 voters206 views17:26

JAVA

import java.util.ArrayList;
public class Program
{
public static void main(String[] args) {
ArrayList a=new ArrayList();
a.add("C");
a.add("E");
a.add("B");
a.add("D");
a.add("A");
a.add("Z");
a.add("M");
a.remove(1);
a.remove(3);
a.add(2,a.get(3));
a.add(a.size()+" ");
a.remove(3);
System.out.println(a);
}
}

204 views17:31

JAVA

Options for above program

Anonymous Quiz

28 voters202 views17:33

JAVA

import java.util.ArrayList;
public class Program
{
public static void main(String[] args) {
String s1="Hello World";
String s2=new String("Hello World");
String s3=s2.intern();
System.out.println((s1==s2)+" "+(s2==s3)+" "+(s1==s3));
}
}

213 views17:37

JAVA

Options for above program

Anonymous Quiz

29 voters217 views17:38

JAVA

import java.util.ArrayList;
public class Program
{
public static void main(String[] args) {
int i=0;
char[] chArray=new char[20];
chArray={'a','b','c'};
System.out.println(chArray[i = +2]});
}
}

222 views17:41

JAVA

Options For above program

Anonymous Quiz

28 voters227 views17:42

JAVA

218 views15:57

JAVA

Consider the following code fragment
Rectangle r1 = new Rectangle();
r1.setColor(Color.blue); Rectangle r2 = r1; r2.setColor(Color.red); After the above piece of code is executed, what are the colors of r1 and r2 (in this order)?

Anonymous Quiz

30%

Color.blue Color.red

17%

Color.blue Color.blue

35%

Color.red Color.red

17%

Color.red Color.blue

None of the above.

23 voters230 views16:15

JAVA

What is the type and value of the following expression? (Notice the integer division)
-4 + 1/2 + 2*-3 + 5.0

Anonymous Quiz

27 voters252 views16:16

JAVA

Goalkicker

Free .NET Framework Book

Getting started with .NET Framework, Strings, DateTime parsing, Dictionaries, Collections, ReadOnlyCollections, Stack and Heap, LINQ, ForEach, Reflection, Expression Trees, Custom Types, Code Contracts, Settings, Regular Expressions (System.Text.RegularExpressions)…

365 views11:27

JAVA

public class Program
{
public static String toString(){ System .out.println("Hello"); return ""; } public static void main(String[] args) { System.out.println(toString ); } }

Anonymous Quiz

Program@7fh2bd8(object class toString method is being called)

10%

No Output

30 voters232 views12:38

JAVA

Consider the two methods (within the same class)
public static int foo(int a, String s)
{
s = "Yellow";
a=a+2;
return a;
}
public static void bar()
{
int a=3;
String s = "Blue";
a = foo(a,s);
System.out.println("a="+a+" s="+s);
}
public static void main(String args[])
{
bar();
}
What is printed on execution of these methods?

231 views16:15

JAVA

Mastering OOP: A Practical Guide To Inheritance, Interfaces, And Abstract Classes — Smashing Magazine
https://www.smashingmagazine.com/2019/11/guide-oop-inheritance-interfaces-abstract-classes/

Smashing Magazine

Mastering OOP: A Practical Guide To Inheritance, Interfaces, And Abstract Classes — Smashing Magazine

Arguably the worst way to teach the fundamentals of programming, is to describe what something is, without mention of how or when to use it. In this article, Ryan M. Kay discusses three core concepts in OOP.

238 views04:36

JAVA

Forwarded from Hasta Hua

Java interview questions (1).pdf

213.4 KB

597 views18:52

JAVA

JAVA pinned Deleted message

12:19

JAVA

public class Program
{
private int num; private Program(){ System.out.print("Constructor"); num=5; } public static void main(String[] args) { Program p=new Program(); System.out.println(p.num); } }

Anonymous Quiz

22 voters192 views18:19

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