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
Correct Answer :
C. Unicode characters are all 16 bits.
Related Questions
JSP files creates ________________
html files
html files and java files
java files and class files
None of the above.
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");
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
When we implement the Runnable interface, we must define the method
start()
init()
runnable()
run()
A string object can not be modified after it is created.
True
False
The use of protected keyword to a member in a class will restrict its visibility as follows:
Visibility only in the class and its subclasses in the same package.
Visibility only inside the same package.
Visibility in all classes in the same package and subclasses in other packages.
Visibility only in the class where it is declared.
Which of the following methods can be used to draw the outline of a square?
fillRect()
drawLine()
drawString()
all of the above
In RMI before running the client program we must start RMI Registry.
True.
False.
All methods in an abstract class must be declared abstract.
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
Throwing an exception always causes program termination.
True
False
Which of the following command lines options generates documentation for all classes and methods?
-protected
-public
-private
-encoding
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)
Which of the following methods can be used to change the size of a
size() *
resize()
component
dimension()
setSize()
size()
It is an error if a class with one or more abstract methods is not explicitly declared abstract.
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
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
We can over load methods with differences only in their return type.
True
False
Which of the following are keywords?
integer
default
Boolean
Object
Declaring a method synchronized guarantees that the deadlock cannot occur.
True
False
The default case is always required in the switch selection structure.
True
False
Which of the following are the wrapper classes?
Random
Vector
Byte
all of the above
In evaluating a logical expression of type 'Boolean expression 1&& Boolean expression 2', both the Boolean expressions are not always evaluated.
True
False
Which of the following keywords are used to control access to a class member?
default
protected
interface
None of the above
A package is a collection of
classes
interface
editing tools
classes and interfaces
Java is fully object oriented programme.
true
false
The break statement is required in the default case of a switch selection structure.
True
False
Two methods cannot have the same name in Java.
True
False
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