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Java Interview Questions - Page 2

                         

Question: Parsers? DOM vs SAX parser
Answer:
parsers are fundamental xml components, a bridge between XML documents and applications that process that XML. The parser is responsible for handling xml syntax, checking the contents of the document against constraints established in a DTD or Schema.

Question: What is a platform?
Answer:
A platform is the hardware or software environment in which a program runs. Most platforms can be described as a combination of the operating system and hardware, like Windows 2000/XP, Linux, Solaris, and MacOS.

Question: What is the main difference between Java platform and other platforms?
Answer:
The Java platform differs from most other platforms in that it's a software-only platform that runs on top of other hardware-based platforms. The Java platform has two components:

1. The Java Virtual Machine (Java VM)

2. The Java Application Programming Interface (Java API)

Question: What is the Java Virtual Machine?
Answer:
The Java Virtual Machine is a software that can be ported onto various hardware-based platforms.

Question: What is the Java API?
Answer:
The Java API is a large collection of ready-made software components that provide many useful capabilities, such as graphical user interface (GUI) widgets.

Question: What is the package?
Answer:
The package is a Java namespace or part of Java libraries. The Java API is grouped into libraries of related classes and interfaces; these libraries are known as packages.

Question: What is native code?
Answer:
The native code is code that after you compile it, the compiled code runs on a specific hardware platform.

Question:  Is Java code slower than native code?  
Answer:
Not really. As a platform-independent environment, the Java platform can be a bit slower than native code. However, smart compilers, well-tuned interpreters, and just-in-time bytecode compilers can bring performance close to that of native code without threatening portability.

Question: What is the serialization? 
Answer:
The serialization is a kind of mechanism that makes a class or a bean persistence by having its properties or fields and state information saved and restored to and from storage.

Question: How to make a class or a bean serializable?
Answer:
By implementing either the java.io.Serializable interface, or the java.io.Externalizable interface. As long as one class in a class's inheritance hierarchy implements Serializable or Externalizable, that class is serializable.

                         

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Current Comments

9 comments so far (
post your own) View All Comments Latest 10 Comments:

This site is very good all the tutorials are available in one site

Posted by Satish kumar on Sunday, 01.20.08 @ 22:21pm | #45711

html is platform indipendent language or not?

what is the role of html in applets?


In html how to allocate memory for the variables and texts or strings?

Posted by jaffar on Saturday, 07.7.07 @ 15:48pm | #20884

very good site and very nice Q & Ans..............



lot of help to face the interview..........


yhanks lot of thanks...............

Posted by sushil gulhane on Wednesday, 06.27.07 @ 10:23am | #20262

how to add n no.of elements in ArrayList?

Posted by Satyanarayana on Friday, 05.18.07 @ 19:50pm | #16394

Hi,
When i will get selected in Wipro Tech. by reading the questions given by u then i will say that its good.

Posted by kauleshwar on Friday, 05.11.07 @ 09:45am | #15630

To understand a java subject from basic this site as proved incredible features.

thanks and regards to developer.

Posted by Shilpa Sawant on Friday, 03.2.07 @ 16:06pm | #10229

Everything is extraordinary

Posted by mitul on Monday, 01.22.07 @ 20:40pm | #4060

i like the site most and it helps me 2 prepare for my intervew.

thanx 2 all of the site owners and developpers


Posted by shyam on Friday, 01.5.07 @ 15:21pm | #2687

i like the site most and it helps me 2 prepare for my intervew.

thanx 2 all of the site owners and developpers

Posted by sunipatra on Saturday, 12.9.06 @ 11:22am | #685

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