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Which of the following methods cause the String object referenced by s to be changed? (Select multiple)
A) s.concat( )B) s.toUpperCase( )C) s.replace( )D) s.valueOf( )
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What is the difference between a Choice and a List
A Choice is displayed in a compact form that requires you to pull it down to see the listof availablechoices. Only one item may be selected from a Choice. A List may be displayed in such away that severalList items are visible. A List supports the selection of one or more List items.
Anurag yadav
- Oct 9th, 2019
Choice and list awt
Sandhya.Kishan
- Jun 11th, 2012
Choice contains a list of items and we can only select one item from a choice.
List is used to display several items and we can select more than one item from a list. -
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Which of the following types of class members can be part of the internal part of a class? (Select multiple)
A) Public instance variablesB) Private instance variablesC) Public methodsD) Private methods
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The this reference is used in conjunction with ___methods.
A) staticB) non-staticC) privateD) protected.
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Which of the following declare an array of string objects? (Select Multiple)
A) String[ ] s;B) String [ ]s:C) String[ s]:D) String s[ ]:
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The Java compiler requires that a source file use the ________ filename extension
A) .hB) . javaC) >javaD) .class
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Can an anonymous class be declared as implementing an interface and extending aclass
An anonymous class may implement an interface or extend a superclass, but may not bedeclared to do both.
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Without main Method
How can we use method without using main method in JAVA?
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IS String is a wrapperclass? explain wrapper class
Raghu Chahar
- Jun 5th, 2018
But char is a primitive datatype and String wraps it.
jegadeesh
- Nov 9th, 2005
no String is not wrapper class.wrapper class is class that allows us to access primitive data types as objects.there r 8 wrapper classes r there in java. Integer,Float,Double,Byte,Charactor,Short,Long,Boolean.
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Is null a keyword
The null value is not a keyword.
Himanshu chauhan
- May 26th, 2018
False
jimmy514in
- Jul 4th, 2010
Null is not a keyword in Java.It is a literal and cannot be used anywhereReference: http://java.sun.com/docs/books/tutorial/java/nutsandbolts/_keywords.html
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What is the difference between an if statement and a switch statement
The if statement is used to select among two alternatives. It uses a boolean expression todecide which alternative should be executed. The switch statement is used to select among multiple alternatives. It uses an int expression to determine which alternativeshould be executed.
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What are the two types of multitasking?1. Process-based2. Thread-based
A) 1B) 2C) Both 1,2D) None of the above
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What is the output of the following program?
class Test{
public static void main(String [] args){
int a=8;
a=--a+a--+a++;
System.out.println(a );
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What are the functions of the dot(.) operator? (Select multiple)
A) It enables you to access instance variables of any objects within a classB) It enables you to store values in instance variables of an objectC) It is used to call object methodsD) It is to create a new object
Java Interview Questions
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