The expression (x == y && a<b) is true If either x == y is true or a<b is true.
True
False
Correct Answer :
B. False
Related Questions
A thread can make second thread ineligible for execution by calling the suspend (-) method on second thread.
True
False
The programmer must explicitly create the system .in and system .out objects.
True
False
The setBackground() method is part of the class
Applet
Component
Container
Object
It is an error if a class with one or more abstract methods is not explicitly declared abstract.
True
False
It is an error to have a method with the same signature in both the super class and its subclass.
True
False
The import statement is always the first no comment statement in a Java program files.
True
False
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
The length of a string object 's1' can be obtained using the expression s1.length.
True
False
The default case is always required in the switch selection structure.
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
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
When we implement an interface method, it should be declared as public.
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()
Session bean
Represents a single client inside the application server
Can not be shared
Is not persistent
Satisfies all of the above conditions
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
The break statement is required in the default case of a switch selection structure.
True
False
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.
Declaring a method synchronized guarantees that the deadlock cannot occur.
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)
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.
When present, package must be the first no comment statement in the file.
True
False
Which of the following methods can be used to change the size of a
size() *
resize()
component
dimension()
setSize()
size()
If a=10 and b= 15, then the statement x =(a>b)?a:b; assigns the value 15 to x.
True
False
Any method in a supper class can be over ridden in its subclass.
True
False
Which of the following are keywords?
integer
default
Boolean
Object
Which of the following represent legal flow control statements?
break;
break();
continue(inner);
all of the above
forName() is a static factory method
True
False
When we invoke repaint () for a Component, the AWT invokes the method:
draw()
update()
show()
paint()
Which of the following classes are available in the java.lang package?
Random
Stack
String Buffer
Vector