ARUL KUMAR JAVA PDF

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It is also possible for programs to create objects that are not subject to garbage collection. What is the difference between a Web server and an application server? The String class is immutable, javaa that once it is created a String object cannot be changed.

200 LATEST JAVA interview Questions pdf arul kumar

Higher load factor values default kumae factor of 0. So care should be taken not to unintentionally expose the collection fields to the caller.

As a software engineer, your income will start to plateau in 8 to 10 years. So, if two objects agree that they are equal and follow the above mentioned symmetric principle, then Java – Fundamentals 35 one of them cannot decide to have a similar contract with another object of different class. For example String class uses the following methods: Refer Q16 and Q39 in Java section.

What will xrul if static modifier is removed from the signature of the main method? The following method is specified in the Comparator interface.

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Define the system structure better. The code sleep ; puts thread aside for exactly two seconds. Should we use Value Objects to reduce network overhead? Method overloading increases the readability of the program. How would you refresh your cache if your database is shared by more than one application?

It is easy to implement the equals method incorrectly, if you do not understand the contract.

Is it necessary that each try block must be followed by a catch block? If multiple threads concurrently access a collection and at least one of the threads either adds or deletes an entry into the collection, then the collection must be externally synchronized. If you define your own key class then it is a best practice to make the key class an immutable object i.

Also where applicable consider using composite design pattern, where an object may represent a single object or a collection of objects.

If the access modifier of the inner class is static, then it becomes nested class. What is Serialization and deserialization? An abstract base class usually provides an implementation inheritance.

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Integer or a java. Composite design pattern manipulates composite objects just like you manipulate individual components. When Java is compiled, it is not compiled into platform specific machine, rather into platform independent byte code. A class is a blue print from which individual objects are created.

What is the default value of float and double datatype in Java? Web service, messaging system, sockets, RPC etc. A multithreaded program contains two or more parts that can run concurrently. Path is defines where the system can find the executables. The Exception class has two main subclasses: The increased quality and reduced development time are the by-products of the key benefits discussed above.

If you define a equals method then you must define a hashCode method as well.

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List of items from an array of objects, then it is more efficient and it is a best practice to use Arrays. The management was impressed with the outcome and rewarded the team with an outstanding achievement award. LF CO A According to Kmar Operator precedence, which operator is considered to be with highest precedence?

For example while you were working for Bips telecom, you pro-actively identified a performance issue due to database connection resource leak. A client program creates a socket on its end of the communication and attempts to connect that socket to a server. This overnight batch process is responsible for performing a very database intensive search and compute changes like cost of ingredients, selling price, javs menu item etc made in various retail stores and package those changes into XML files and send those XML data to the respective stores where they kumag uploaded into their point of sale registers to reflect the changes.

If you happen to be in an interview with an organization which is working on a pilot project using a different development methodology like agile methodology etc or has just started adopting a newer development kumwr or methodology iava you are likely to be asked questions on this key area.

How Java enabled High Performance? Implementing a properly functioning clone method is complex and it is rarely necessary. This is one of 3 methods used by JComponents to paint themselves. The class, which is implementing the interface, should provide the actual implementation.