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What is the output of the following? // A simple example of recursion.class Factorial { // this is a recursive method int fact(int n) { int result; if(n==1) return 1; result = fact(n-1) * n; return result; }} class Recursion { public static void main(String args[]) { Factorial f = new Factorial(); System.out.println("Factorial of 3 is " + f.fact(3)); }}
A) Factorial of 3 is 3B) Factorial of 3 is 6C) Factorial of 3 is 9D) None of the above
r.praveenkumar
- Feb 26th, 2009
Ans is (d) None of the aboveBecause we are not defining else part of the if statement.Unreachable code error because of the absence of else part.
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How to send email using java?
vijays
- Jan 17th, 2009
?Java Mail API is ued to send a Mail through java application. To Test Program all you need to have is a SMTP address (Which your ISP Provides).?We will see a sample program to send a mail through j...
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Explain java classes in detail?
vijays
- Jan 17th, 2009
The Java class file is a precisely defined format for compiled Java. Java source code is compiled into class files that can be loaded and executed by any JVM. The class files may travel across a netwo...
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How to convert .class file to .exe file
vijays
- Jan 17th, 2009
This is a very common question asked in the comp.lang.java newsgroup. Its often useful to have an executable application when deploying your applications to a specific platform, but remember to make your .class files available for users running Unix/Macintosh/other platforms.
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The new operator dynamically allocates ________ for an object and returns a reference to it.
A) ClassesB) VariablesC) Memory D) None of the Above
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Java allows objects to initialize themselves when they are created using _________
A) ArgumentsB) ClassesC) ConstructorsD) Parameters
r.praveenkumar
- Aug 6th, 2008
Yes objects can be created only using constructors if we do not provide one compiler will create a default cons for us thus allocating memory for objects we are going to create and the default values ...
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Through _________ , you can control what parts of a program can access the members of a class
A) EncapsulationB) ClassC) InheritenceD) Polymorphism
supriya ahire
- Mar 23rd, 2006
ans is : Encapsulation Encapsulation is used to hide data or information.
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When we create a class, we are creating a new data type
A) TrueB) False
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A class is declared by use of the ________ keyword.
A) ObjectB) ClassC) Instance D) None of the above
sneh lata
- Sep 15th, 2007
A class is declared with "class" keyword not "Class" keyword.Class is a predefined class which is used to load other classes.
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The Code in java is contained within Methods
A) TrueB) False
keyvez
- Mar 19th, 2008
Code in Java can also be in instance initializer blocks and static and non-static blocks. So the answer to this question is false.
sukace
- Nov 20th, 2007
Code in java can also be in blocks(Static and non-static) which are not the part of the methods. So, the answer should be false not true.
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How to declare and defile a final class without use of final keyword?
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A paramter is a variable defined by a method that receives a value when the method is called.
A) TrueB) FalseExplanation: A argument is a variable defined by a method that receives a value when the method is called.
realneeraj
- Dec 28th, 2005
Well, An argument is what you pass to a function while calling. And parameter is a variable defined by the function to receive that value.
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The variable receiving the value returned by a method must also be compatible with the return type specified for the method.
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In Java, all class objects need not be dynamically allocated
A) TrueB) False
nkamuni
- Dec 19th, 2007
I think it is true. Because, we use initalize some variables which are not dynamic.For eg: int i = 10;
bujji
- Mar 24th, 2006
False
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It is possible to define a class within another class; such classes are known as ____________
A) Nested Classes
sukace
- Nov 20th, 2007
I think this mode of answering the question when you have to enter the text should not be used. one thing can be named in many ways, and you cant say that which is correct.I answered Inner classes and it says its wrong.
pandiyarajanm
- Apr 9th, 2007
A class is defined inside the another class(ie) innwerc class.Nested class is a class of class.
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The methods and variables defined within a class are called members of the class
A) TrueB) False
sneh lata
- Sep 15th, 2007
Truemembers of a class may include methods and variables.They can easily invoked by an object reference.
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What is enumeration?
godsgirl
- Jul 29th, 2007
Rabbi i appreciate your help, but do you know what enumeration is when talking about the 9th Amendment?
ramjee
- Nov 2nd, 2006
Enumeration is a legacy class it is same like Iterator i.e.it will add one element at a time the only diff is we cannot delete an element in Enumeration.cheers,Ramee..
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How do we call two interfaces in one interface?
sujatham
- Jul 28th, 2007
In interface we?can call two?interfaces?by?extending those interfaces with extends clause.
sri
- Dec 12th, 2005
if a interface extends another interface what we call extended interface for exinterface A{}interface B extends A{}what we call A
Java Classes Questions
Ans