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What is an Iterator?
Some of the collection classes give traversal of their contents via a java.util.Iterator interface. This interface permits you to walk through a collection of objects, operating on every object in turn.
Remember when using Iterators that they have a snapshot of the collection at the time the Iterator was obtained; generally it is not advisable to modify the collection itself whereas traversing an Iterator.
Question 1: a) What is an "Operating System"? b) Describe the four main computer system components. c) Describe and compare "Parallel Systems" and "Distributed Systems
What is the Set interface? A Set interface is collection of element that can't be duplicated. Set interface comprise methods inherited from collection. It provides method
calculator
Problem description: A travelling salesman wants to make a tour of the cities and returns back to the starting point. What is the minimum length tour? Formal Definiti
When should a method be static? • Neither reads from nor writes to example fields • Independent of the state of the object • Mathematical methods which accept arguments, appl
EJBs are distributed elements, which need the RMI framework for object distribution. An EJB application server gives more services like object pooling, transaction management, data
Describe the relational operators in java? Java has six relational operators which compare two numbers and return a boolean value. The relational operators are , > , , >=
What is synchronization and why is it important? With respect to multithreading, synchronization is the potential to control the access of multiple threads to shared resources.
According to XMPP Standards Foundation "XMPP is the Extensible Messaging and Presence Protocol, a set of open technologies for instant messaging, presence, multi-party chat, voice
Describe about Applet Security? The possibility of surfing the Net, wandering across a random page, playing an applet and catching a virus is a fear in which has scared several
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