- Everything is an object in Java( Single root hierarchy as everything gets derived from java.lang.Object).
- Java does not have all the complicated aspects of C++ ( For ex: Pointers, templates, unions, operator overloading, structures etc..).
- The Java language promoters initially said "No pointers!", but when many programmers questioned how you can work without pointers, the promoters began saying "Restricted pointers." You can make up your mind whether it's really a pointer or not. In any event, there's no pointer arithmetic.
- There are no destructors in Java. (automatic garbage collection), Java does not support conditional compile (#ifdef/#ifndef type).
- Thread support is built into java but not in C++. Java does not support default arguments.
- There's no scope resolution operator :: in Java. Java uses the dot for everything, but can get away with it since you can define elements only within a class. Even the method definitions must always occur within a class, so there is no need for scope resolution there either.
- There's no "goto " statement in Java. Java doesn't provide multiple inheritance (MI), at least not in the same sense that C++ does.
- Exception handling in Java is different because there are no destructors. Java has method overloading, but no operator overloading.
- The String class does use the + and += operators to concatenate strings and String expressions use automatic type conversion, but that's a special built-in case. Java is interpreted for the most part and hence platform independent
What is MQ and what does it do? Ans. MQ stands for MESSAGE QUEUEING. WebSphere MQ allows application programs to use message queuing to participate in message-driven processing. Application programs can communicate across different platforms by using the appropriate message queuing software products. What is Message driven process? Ans . When messages arrive on a queue, they can automatically start an application using triggering. If necessary, the applications can be stopped when the message (or messages) have been processed. What are advantages of the MQ? Ans. 1. Integration. 2. Asynchrony 3. Assured Delivery 4. Scalability. How does it support the Integration? Ans. Because the MQ is independent of the Operating System you use i.e. it may be Windows, Solaris,AIX.It is independent of the protocol (i.e. TCP/IP, LU6.2, SNA, NetBIOS, UDP).It is not required that both the sender and receiver should be running on the same platform What is Asynchrony? Ans. With messag...
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