The default case is always required in the switch selection structure.
True
False
Correct Answer :
B. False
Related Questions
When X is a positive number the operations x>> 2 and x>>>2 both produce the same result.
True
False
Which of the following represent legal flow control statements?
break;
break();
continue(inner);
all of the above
A constructor must always invoke its supper class constructor in its first statement.
True
False
Members of a class specified as private are accessible only to the methods of the class.
True
False
JdbcOdbcDriver is an object of Object class
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
A variable declared inside the for loop control can not be referenced out side the loop.
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
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.
Consider the following statements:
int x = 10, y = 15;
x = ((x < y) ? (y + x) : (y - x);
What will be the value of x after executing these statements?
x = ((x < y) ? (y + x) : (y - x);
25
15
5
Error can't be executed.
Which of the following control expressions are valid for an if statement?
an integer expression
a Boolean expression
either A or B
Neither A or B
In the code below, what data types the variable x can have?
byte b1 = 5;
byte b2 = 10;
x = b1 * b2;
int short
forName() is a static factory method
True
False
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
The methods wait() and noify() are defined in
java.lang.Thread
java.lang.Runnable
java.lang.Object
java.lang.ThreadGroup
Connection, Statement are interfaces and ResultSet is a class.
True.
False.
The check box group class is a subclass of the component class.
True
False
A class may be both abstract and final.
True
False
If a=10 and b= 15, then the statement x =(a>b)?a:b; assigns the value 15 to x.
True
False
A Java monitor must either extend thread class or implement Runnable interface.
True
False
The name of a Java program file must match the name of the class with the extension Java.
True
False
One the features of is that an array can store many different types of values.
True
False
Any class may be inherited by another class in the same package.
True
False
For all insert, update, delete, query operations on a database, ResultSet object creation is mandatory.
True.
False.
When we implement an interface method, it should be declared as public.
True
False
Which of the following represent legal flow control statements?
break();
continue(inner);
return;
exit();
executeUpdate(------------) returns ___________
Nothing
Returns a ResultSet object
Returns an integer value to show the no. of updated rows
None of the above.
In a single Servlet class we can use____________
doGet(...) method only
doPost(...) method only
doGet(...) method and doPost(...) method both at a time.
Either 'a' or 'b'
Objects are passed to a method by use of call-by-reference.
True
False
Submit button always fires doPost(...)
True
False