Java Screening Test

When Exceptions in Java does arise in code sequence?

Run Time

Compilation Time

Can Occur Any Time

None of the mentioned

Which of the following can be used to fully abstract a class from its implementation?

Objects

Packages

Interfaces

None

What is the difference between Text Area and Text Field ?

A Text Area can handle multiple lines of text

A text area can be used for output

Text Area is not a class

Text areas are used for displaying graphics

What will be the output of the program?

Public class Test {

Public Static Void Main (String [] args) {

String str = NULL;

System.out.println (str);

} }

NULL

Complication Error

Code runs but no output

Runtime Exception

Which object of HttpSession can be used to view and manipulate information about a session?

creation time

session identifier

last accessed time

All of the mentioned

What technique is used for the authentication mechanism in servlet specification?

Role Based Authentication

Form Based Authentication

Both 1 & 2

None of the above

What is the output of the program?

Class Expectation {

Public Static Void Main (String [] args) {

Try {

System.out.println (“Hello” +””+1/0);

} catch (ArithmeticException e) {

System.out.println (“World”);

}}}

Hello

World

HelloWorld

Hello World

Which constructs an anonymous inner class instance?

Runnable r = new Runnable () { };

Runnable r = new Runnable (public void run() { });

Runnable r = new Runnable {public void run(){}};

System.out.println (new Runnable() {public void run() { }});

In JSP Action tags which tags are used for bean development?

jsp:useBean

jsp:setPoperty

jsp:getProperty

All mentioned above

What is the output of the program

Public class A {

Public static void main (String [] args)

{if (true)

Break ;}}

Run without Error

Throws Error

What happens when compile and run the program?

Public class collection {

Public static void main (String [] args) {

List<Integer> list = new ArrayList<Integer> ();

Integer [] arr = {2, 10, 3};

List = Arrays.asList (arr);

List. Set (0, 3);

System.out.println (list);

List. Add (1);

System.out.println (list);

}}

What is the output of the program?

Public class Test {

Public static void main (String [] args) {

System.out.println (Math.min (Double.MIN_VALUE, 0.0d));

}}

Compile Time Exception

Run Time Exception

0.0

2^(-1074)

13. Can you override a private or static method in Java?

Yes

What does the expression 1.0 / 0.0 will return? Will it throw Exception? Any compile time error?

Throw ArithmeticException

Run Successfully without any error

Any other exception

What does the following Java program print?

public class Test {

Public static void main (String [] args) throws Exception {

Char [] chars = new char [] {'\u0097'};

String str = new String (chars);

Byte [] bytes = str.getBytes ();

System.out.println (Arrays.toString (bytes));

} }.

Return value of -105 ((byte) 0x97).

Result depends on the Operating System & Locale

Returns 63

None of the above