Declaring a method synchronized guarantees that the deadlock cannot occur.
True
False
Correct Answer :
A. True
Related Questions
In RMI we invoke client method from remote server
True
False
Submit button always fires doPost(...)
True
False
Which of the following keywords are used to control access to a class member?
default
protected
interface
None of the above
With javadoc, which of the following denotes a javadoc comment?
//#
/*
/**
//**
A catch can have comma-separated multiple arguments.
True
False
The setBackground() method is part of the class
Applet
Component
Container
Object
A constructor must always invoke its supper class constructor in its first statement.
True
False
If a=10 and b= 15, then the statement x =(a>b)?a:b; assigns the value 15 to x.
True
False
Declarations can appear anywhere in the body of a Java method.
True
False
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
The modulus operator (%) can be used only with Integer operands.
True
False
All methods in an abstract class must be declared abstract.
True
False
Which of the following methods can be used to remove a component from the display?
remove()
desappear()
hide()
move()
Connection, Statement are interfaces and ResultSet is a class.
True.
False.
A JSP file can be stored_________________
With the extension .jsp in servlets folder of the jws
With the extension .html in public_html folder of the jws
With the extension .jsp in public_html folder of the jws
None of the above.
Java always provides a default constructor to a class.
True
False
For all insert, update, delete, query operations on a database, ResultSet object creation is mandatory.
True.
False.
Two methods cannot have the same name in Java.
True
False
In the code below, what data types the variable x can have?
byte b1 = 5;
byte b2 = 10;
x = b1 * b2;
int short
It is perfectly legal to assign a subclass object to a supper class reference.
True
False
The concept of multiple inheritance is implemented in Java by
extending two or more classes
extending one class and implementing one or more interfaces
all the above
putValue(...) method takes _____________________-
Two arguments of object type
First one is of a character type and second one is of an object type
First one is of an object type and second one is of a character type
None of the above.
Which of the following methods can be used to change the size of a
size() *
resize()
component
dimension()
setSize()
size()
All the bitwise operators have the same level of precedence in Java.
True
False
Which of the following string can be used as mode string for creating a RandomAccessFile object?
"rw"
"wr"
"0"
'w''
The name of a Java program file must match the name of the class with the extension Java.
True
False
A final class may not have any abstract method.
True
False
When present, package must be the first no comment statement in the file.
True
False
Which of the following methods can be used to draw the outline of a square?
fillRect()
drawLine()
drawString()
all of the above
Java is fully object oriented programme.
true
false