A static class method can be invoked by simply using the name of the method alone.
True
False
Correct Answer :
B. False
Related Questions
A Java monitor must either extend thread class or implement Runnable interface.
True
False
Session bean
Represents a single client inside the application server
Can not be shared
Is not persistent
Satisfies all of the above conditions
A variable declared inside the for loop control can not be referenced out side the loop.
True
False
The use of protected keyword to a member in a class will restrict its visibility as follows:
Visibility only in the class and its subclasses in the same package.
Visibility only inside the same package.
Visibility in all classes in the same package and subclasses in other packages.
Visibility only in the class where it is declared.
One the features of is that an array can store many different types of values.
True
False
We would like to make a member of a class visible in all subclasses regardless of what package they are in. Which one of the following keywords would achieve this?
private
protected
public
private protected
An individual array element that is passed to a method and modified in that method will contain the modified value when the called method completes execution.
True
False
Which javadoc tag is used to denote a comment for methods parameters?
@method
@parameter
@argument
@param
Which of the following are not keywords?
NULL
Implements
Protected
None of the above
Objects are passed to a method by use of call-by-reference.
True
False
Declaring a method synchronized guarantees that the deadlock cannot occur.
True
False
Given the code
String s = new String("abc");
Which of the following calls are valid?
s.toUpperCase()
s.append("xyz")
s.setCharAt(1<'A')
all of the above
In order to connect to a database through java program we must create _______-
Connection, Statement, ResultSet
Connection, ResultSet
Statement< ResultSet
Connection, Statement
The expression (x == y && a<b) is true If either x == y is true or a<b is true.
True
False
Which of the following methods can be used to change the size of a
size() *
resize()
component
dimension()
setSize()
size()
Members of a class specified as private are accessible only to the methods of the class.
True
False
When we implement the Runnable interface, we must define the method
start()
init()
runnable()
run()
The setBackground() method is part of the class
Applet
Component
Container
Object
Consider the following code snippet:
try
{
int x=0; int y=50/x;
System.out.println("Division by zero");
}
catch(ArithmeticException e)
{
System.out.println("catch block");
}
What will be the output?
{
int x=0; int y=50/x;
System.out.println("Division by zero");
}
catch(ArithmeticException e)
{
System.out.println("catch block");
}
Error. Won't compile
Division by zero
Catch block
Division by zero catch block
If a=10 and b= 15, then the statement x =(a>b)?a:b; assigns the value 15 to x.
True
False
What is java -g used for?
Using the jdb tool
Executing a class with optimization turned off
To provided information about deprecated methods
Non of the above
What is wrong in the following class definitions?
abstract class print {
abstract show();
}
class Display extends print {
}
abstract show();
}
class Display extends print {
}
Nothing is wrong
Wrong Method show() should have a return type
Wrong Methods show() is not implemented in Display
Wrong Display does not contain any members.
In RMI we invoke client method from remote server
True
False
Which exception is thrown by the read() method of InputStream class?
IOException
FileNotFoundException
ReadException
None of the above
Give file is a file object, which of the following are legal statements to create a new file.
file.create();
FileOutputStream fos=new FileOutputStream(file);
FileInputStream fis=new FileInputStream(file);
all of the above
JdbcOdbcDriver is an object of Object class
True
False
Which of the following are keywords?
integer
default
Boolean
Object
Message-Driven beans act as a listener for the Java Message Service API, processing messages synchronously
True
False
Which of the following statements are true?
UTF characters are all 24 bits.
Reader class has methods that can read integers and floats.
Unicode characters are all 16 bits.
all of the above
Which of the following string can be used as mode string for creating a RandomAccessFile object?
"rw"
"wr"
"0"
'w''