MSBTE AJP Online Test: Practice MCQs for Advanced Java Programming

MCQ Test

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Which of these events is generated when the size of an event is changed?

ComponentEvent ContainerEvent FocusEvent InputEvent

Which of these methods can be used to get reference to a component that was removed from a container?

getComponent() getchild() getContainerComponent() getComponentChild()

The superclass of ContainerEvent, FocusEvent and WindowEvent is _________

ActionEvent ItemEvent KeyEvent ComponentEvent

The getComponent() method returns the component that generated the ________.

object event All of these ComponentEvent

What is the use of getChild() method.

component added to or removed. component created Both (a) / (b) None of these

A socket is consist of ?

only IP address port + IP address only port address none of the above

Which packet implements is Connectionlesss paket delivery service

server socket datagrampaket Inetserver datagramSocket

ServerSocket class creates ________ a specified port

UDP HTTP KeyEvent TCP

UDP Protocol uses following classes for communication

DatagramPacket and DatagramSocket Only DatagramPacket SeverSocket and Server None of these

Which of these events is generated when the component is added or removed?

ComponentEvent FocusEvent ContainerEvent InputEvent

UDP Protocol uses following classes for communication

DatagramPacket and DatagramSocket getData getAddress() None of these

_______ method of DatagramSocket class is used to receive DatagramPacket

Get(DatagramPacket packet) receive(DatagramPacket packet) Get(datagrampacket packet) None of these

If we create the datagram packet with following constructor: DatagramPacket (byte data[],int offset, int size, InetAddress ipaddress, int port) What "size" parameter specifies?

size of InerAddress Size of data size of the packet None of these

select the proper method to retrive the data from DatagramPacket

getData() GetData() Data() None of these

Write a syntax to prepare DatagramPacket Object as sendPacket by using other parameter as following. InetAddress IPAddress = InetAddress.getByName("127.0.0.1"); byte[] sendData = new byte[1024]; int port=9876; String sentence = inFromUser.readLine(); sendData = sentence.getBytes();

DatagramPacket sendPacket=DatagramPacket(sendData, sendData.length, IPAddress, port); datagrampacket sendPacket=datagrampacket(sendData, sendData.length, IPAddress, port); Datagrampacket sendpacket=Datagrampacket(senddata, sendData.length, IPaddress, port); None of these

Which of these class is necessary to implement datagrams?

DatagramPacket DatagramSocket All of the mentioned None of these

Which of these are integer constants of ComponentEvent class?

COMPONENT_HIDDEN COMPONENT_MOVED COMPONENT_RESIZE All of the mentioned

Which of the following components generate action events?

Buttons Labels Check boxes Windows

__________are used to invoke events on the parent component from child components in the hierarchy of components.

Inputs Outputs Blueprints hooks

Which API gets the SocketAddress (usually IP address + port number) of the remote host that this packet is being sent to or is coming from.

DatagramPacket and DatagramSocket getAddress getSocketAddress() address

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