Java ME (Java Platform, Micro Edition) MCQs (Chapterwise Multiple Choice Questions)

What will happen on attempting to compile and run the following code?
public class ERMidlet extends MIDlet implements CommandListener, Runnable
{
        private Display mDisplay;
        private Form myForm;
        private Command exitCommand;
        private StringItem myString;

        ERMidlet()
        {
                myForm = new Form("Expert Rating Exam");
                exitCommand = new Command("Exit",Command.EXIT, 0);
                myString = new StringItem("15");
                myForm.append(myString);

                myForm.addCommand(exitCommand);
                myForm.setCommandListener(this);

        }

        public void startApp()
        {
                mDisplay = Display.getDisplay(this);
                mDisplay.setCurrent(myForm);
        }

        public void commandAction (Command c, Displayable s)
        {
                destroyApp(false);
                notifyDestroyed();
        }

        public void run()
        {
        }

        public void pauseApp()
        {
        }

        public void destroyApp(boolean unconditional)
        {
        }

It will display 15 on the devices screen

The code will not compile

The code will compile but will throw a runtime exception

It will not display anything

Answer & Explanation

Correct Answer: It will display 15 on the devices screen

Note: This Question is unanswered, help us to find answer for this one

Which of the following could be the reasons for the introduction of the Generic Connection framework?

In J2SE Networking classes, the total size was greater than 200Mb

J2SE Networking classes assume TCP/IP is available

Both of the above

Answer & Explanation

Correct Answer: Both of the above

Note: This Question is unanswered, help us to find answer for this one

Which of the following image formats is supported by JTWI 1.0?

JPEG and GIF

PNG

TIFF and PNG

PNG and JPEG

Answer & Explanation

Correct Answer: PNG

Note: This Question is unanswered, help us to find answer for this one

Which of the following is used to specify the Push enable MIDlets?

Midlet-Push-<y>

Midlet-enable-<n>

Midlet-Push-<n>

Midlet-enable-<y>

Answer & Explanation

Correct Answer: Midlet-Push-<n>

Note: This Question is unanswered, help us to find answer for this one

According to JTWI, what is the recommended size for a heap?

256KB

128KB

64KB

16KB

Answer & Explanation

Correct Answer: 256KB

Note: This Question is unanswered, help us to find answer for this one

Which of the following authmodes can be used to share a RecordStore between multiple MIDlets?

AUTHMODE_ANY

AUTHMODE_SHARED

AUTHMODE_PUBLIC

A RecordStore cannot be shared between multiple MIDlets

Answer & Explanation

Correct Answer: AUTHMODE_ANY

Note: This Question is unanswered, help us to find answer for this one

What would be the values for boxes 1 and 2 respectively in the given Generic Framework figure?

Content connection and stream connection

Stream connection and content connection

Data Notifier and stream connection

Answer & Explanation

Correct Answer: Stream connection and content connection

Note: This Question is unanswered, help us to find answer for this one

Which of the following statements is correct regarding RecordStores?

A call to RecordStore.deleteRecord will allow the recordID to be reused

When updating a record, another user can update the same record at the same time

All RecordStore operations are atomic, synchronized, and serialized

Answer & Explanation

Correct Answer: All RecordStore operations are atomic, synchronized, and serialized

Note: This Question is unanswered, help us to find answer for this one

According to JTWI, what is the standard size for a JAD file?

32KB

128KB

64KB

5KB

Answer & Explanation

Correct Answer: 5KB

Note: This Question is unanswered, help us to find answer for this one

MIDP specification requires support for which of the following auth schemes?

Digest

Form

Basic

Answer & Explanation

Correct Answer: Basic

Note: This Question is unanswered, help us to find answer for this one

Java ME (Java Platform, Micro Edition) Quick Quiz

Poor Results!

You need a lot of improvement.

Just don't give up!

Correct Answers: 0/10

Start Practicing with our MCQs given below.