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Primitive data types are passed by reference or pass by value?
Primitive data types are passed by reference or pass by value? Primitive data types are passed by value. 2013-05-16, 2399👍, 0💬

Can an Interface be final?
Can an Interface be final? yes. 2013-02-04, 2399👍, 0💬

Can an exception be rethrown?
Can an exception be rethrown? Yes, an exception can be rethrown. 2012-12-13, 2396👍, 0💬

What are ClassLoaders?
What are ClassLoaders? A class loader is an object that is responsible for loading classes. The class ClassLoader is an abstract class. Given the name of a class, a class loader should attempt to locate or generate data that constitutes a definition for the class. A typical strategy is to transform ... 2013-03-14, 2391👍, 0💬

What are the restrictions placed on static method ?
What are the restrictions placed on static method ? We cannot override static methods. We cannot access any object variables inside static method. Also the this reference also not available in static methods. 2013-03-12, 2391👍, 0💬

How does an exception permeate through the code?
How does an exception permeate through the code? An unhandled exception moves up the method stack in search of a matching When an exception is thrown from a code which is wrapped in a try block followed by one or more catch blocks, a search is made for matching catch block. If a matching type is fou... 2013-05-31, 2390👍, 0💬

Can try statements be nested?
Can try statements be nested? Try statements may be tested. 2013-01-23, 2390👍, 0💬

Can an unreachable object become reachable again?
Can an unreachable object become reachable again? An unreachable object may become reachable again. This can happen when the object's finalize() method is invoked and the object performs an operation which causes it to become accessible to reachable objects. 2013-06-17, 2389👍, 0💬

What are different types of inner classes?
What are different types of inner classes? Nested top-level classes, Member classes, Local classes, Anonymous classes Nested top-level classes- If you declare a class within a class and specify the static modifier, the compiler treats the class just like any other top-level class. Any class outside ... 2013-05-13, 2389👍, 0💬

Is null a keyword?
Is null a keyword? The null value is not a keyword. 2013-02-14, 2389👍, 0💬

What are the Object and Class classes used for?
What are the Object and Class classes used for? The Object class is the highest-level class in the Java class hierarchy. The Class class is used to represent the classes and interfaces that are loaded by a Java program. 2013-01-25, 2389👍, 0💬

What is Externalizable interface?
What is Externalizable interface? Externalizable is an interface which contains two methods readExternal and writeExternal. These methods give you a control over the serialization mechanism. Thus if your class implements this interface, you can customize the serialization process by implementing the... 2013-05-22, 2383👍, 0💬

What is the serialization?
What is the serialization? 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. 2013-02-25, 2383👍, 0💬

You can create an abstract class that contains only abstract methods. On the other hand, you can create an interface that declar
You can create an abstract class that contains only abstract methods. On the other hand, you can create an interface that declares the same methods. So can you use abstract classes instead of interfaces? Sometimes. But your class may be a descendent of another class and in this case the interface is... 2013-04-14, 2382👍, 0💬

Objects are passed by value or by reference?
Objects are passed by value or by reference? Java only supports pass by value. With objects, the object reference itself is passed by value and so both the original reference and parameter copy both refer to the same object . 2013-05-17, 2381👍, 0💬

Explain garbage collection?
Explain garbage collection? Garbage collection is one of the most important feature of Java. Garbage collection is also called automatic memory management as JVM automatically removes the unused variables/objects (value is null) from the memory. User program cann't directly free the object from memo... 2013-02-26, 2378👍, 0💬

What are the high-level thread states?
What are the high-level thread states? The high-level thread states are ready, running, waiting, and dead. 2012-11-02, 2378👍, 0💬

What is an Iterator interface?
What is an Iterator interface? The Iterator interface is used to step through the elements of a Collection. 2012-09-26, 2377👍, 0💬

How is static Synchronization different form non-static synchronization?
How is static Synchronization different form non-static synchronization? When Synchronization is applied on a static Member or a static block, the lock is performed on the Class and not on the Object, while in the case of a Non-static block/member, lock is applied on the Object and not on class. [Tr... 2013-03-19, 2376👍, 0💬

Why isn't there operator overloading?
Why isn't there operator overloading? Because C++ has proven by example that operator overloading makes code almost impossible to maintain. In fact there very nearly wasn't even method overloading in Java, but it was thought that this was too useful for some very basic methods like print(). Note tha... 2013-02-11, 2376👍, 0💬

What modifiers may be used with a top-level class?
What modifiers may be used with a top-level class? A top-level class may be public, abstract, or final. 2013-01-25, 2372👍, 0💬

What methods are used to get and set the text label displayed by a Button object?
What methods are used to get and set the text label displayed by a Button object? getLabel() and setLabel() 2013-01-30, 2370👍, 0💬

Can an abstract class be final?
Can an abstract class be final? An abstract class may not be declared as final. 2013-01-17, 2370👍, 0💬

Use the Externalizable interface when you need complete control over your Bean's serialization (for example, when writing and r
Use the Externalizable interface when you need complete control over your Bean's serialization (for example, when writing and reading a specific file format). No. Earlier order is maintained. 2013-03-08, 2368👍, 0💬

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.NET C C++ CSS DBA General HTML Java JavaScript JSP JUnit MySQL Networking Oracle Perl Perl PHP PL/SQL RSS Software QA SQL Server Struts Unix Windows XHTML XML