A constructor must always invoke its supper class constructor in its first statement.
True
False
Correct Answer :
B. False
Related Questions
class.forName(...) creates an instance of java ODBC driver
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
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
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
The import statement is always the first no comment statement in a Java program files.
True
False
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.
Which of the following are keywords?
integer
default
Boolean
Object
It is perfectly legal to assign a subclass object to a supper class reference.
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 error in the following class definitions?
abstract class xy {
abstract sum(int x, int y) {
}
}
abstract sum(int x, int y) {
}
}
class header is not define properly
constructor is no defined
method is not defined properly
no error
Java is fully object oriented programme.
true
false
The default case is always required in the switch selection structure.
True
False
We can over load methods with differences only in their return type.
True
False
The keywords reserved but not used in the initial version of Java re:
Synchronized
Boolean
union
goto
The modulus operator (%) can be used only with Integer operands.
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
When we implement the Runnable interface, we must define the method
start()
init()
runnable()
run()
With javadoc, which of the following denotes a javadoc comment?
//#
/*
/**
//**
Any method in a supper class can be over ridden in its subclass.
True
False
Frames and applets cannot be used together in the same program.
True
False
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'
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
Which of the following statements are valid array declarations?
int number();
float average[];
double[] marks;
counter int[];
Servlet can have ___________
get method and post method
get method or post method
Either of the above
All methods in an abstract class must be declared abstract.
True
False
When the string objects are compared with ==, the result is true If the strings contain the same values.
True
False
Declaring a method synchronized guarantees that the deadlock cannot occur.
True
False
Which of the following will produce a value of 22 if x=22.9:
Ceil(x)
Round(x)
Rint(x)
Abs(x)
Which of the following represent legal flow control statements?
break();
continue(inner);
return;
exit();
When X is a positive number the operations x>> 2 and x>>>2 both produce the same result.
True
False