A string object can not be modified after it is created.
True
False
Correct Answer :
A. True
Related Questions
Every method of a final in class is implicitly final.
True
False
Which key word can protect a class in package from accessibility by the classes outside the package?
private
protected
final
don't use any keyword at all(make it default)
If you want to assign a value of 99 to the variable year, then which of the following lines can be used within an <applet> tags?
number=getParameter(99)
<number==99>
<param = radius value ==99>
Throwing an exception always causes program termination.
True
False
When the string objects are compared with ==, the result is true If the strings contain the same values.
True
False
If m and n are int type variables, what will be the result of the expression
'm % n' when m = -14 and n = -3?
4
2
-2
-4
To delete a file, we can use an instance of class file.
True
False
The expression (x == y && a<b) is true If either x == y is true or a<b is true.
True
False
A final class may not have any abstract method.
True
False
Which javadoc tag is used to denote a comment for methods parameters?
@method
@parameter
@argument
@param
If a=10 and b= 15, then the statement x =(a>b)?a:b; assigns the value 15 to x.
True
False
Which are the valid ways to create DataInputStream streams?
new DataInputStream(new File("in.dat"));
new DataInputStream(new FileInputStream("in.dat"));
new DataInputStream("in.dat");
new DataInputStream("in.data","r");
It is perfectly legal to assign a subclass object to a supper class reference.
True
False
Connection, Statement are interfaces and ResultSet is a class.
True.
False.
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
A package is a collection of
classes
interface
editing tools
classes and interfaces
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
In RMI we invoke client method from remote server
True
False
Which of the following methods can be used to draw the outline of a square?
fillRect()
drawLine()
drawString()
all of the above
Which of the following will produce a value of 10 if x = 9.7?
floor(x)
abs(x)
rint(x)
round(x)
Which of the following methods belong to the String class?
length()
compareTo()
substring()
all of the them
Session bean
Represents a single client inside the application server
Can not be shared
Is not persistent
Satisfies all of the above conditions
The programmer must explicitly create the system .in and system .out objects.
True
False
Consider the following class definition.
Class Student extends String
{
}
What happens when we try to compile this class?
Will not compile because class body is not defined
Will not compile because class is not declared public
Will compile successfully.
Will not compile because String is abstract
executeUpdate automatically updates data because___________
auto commit is on, by default
It performs a hidden commit statement as well
Does not commit
None of the above.
Consider the following class definitions:
class maths {
student student1;
}
class student {
String name;
}
student student1;
}
class student {
String name;
}
This code represents:
an 'is a' relationship
a 'has a' relationship
both
neither
Java is fully object oriented programme.
true
false
A variable declared inside the for loop control can not be referenced out side the loop.
True
False
Submit button always fires doPost(...)
True
False
A Java monitor must either extend thread class or implement Runnable interface.
True
False