Define Null reference
Null reference: A value utilized to mean, `no object'. Employed whenever an object reference variable is not referring to the object.
Explain the way to write the opening tag of an XHTML element.
Race hazard: It is a situation which occurs between multiple threads sharing a resource. The race hazard occurs whenever one thread's suppositions regarding the state of a resource are invalidated by the actions of the other thread.
Class inheritance: Whenever a super class is expanded through a sub class, a class inheritance relationship exists among them. The sub class inherits the attributes and methods of its super class. Class inheritance in Java, is single
State the term tombstone lifetime attribute?
Explain what is meant by the Class Selector in the CSS?
Client: It is a user of a service. The Web client requests resources from Web server, for example: Whenever the client is an object then this is the sender of messages to its object servers.
Write a function that takes an integer value and returns the number with its digits reversed. For example, given 7631, the function should return 1367.
Server: Something which gives a service. The Web server delivers resources to its clients, for example. Whenever the server is an object, this is the recipient of messages from its object clients.
Explain the relationship between XHTML and XML?
Runtime stack: It is a stack structure maintained by the Java Virtual Machine which records that methods are presently being executed. The most of late entered technique will be at the top of the stack and the main technique of an application will be
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