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What is the difference between preemptive scheduling and time slicing?
What is the difference between preemptive scheduling and time slicing? Under preemptive scheduling, the highest priority task executes until it enters the waiting or dead states or a higher priority task comes into existence. Under time slicing, a task executes for a predefined slice of time and the... 2012-10-04, 2582👍, 0💬

When can an object reference be cast to an interface reference?
When can an object reference be cast to an interface reference? An object reference can be cast to an interface reference when the object implements the referenced interface. 2012-07-13, 2582👍, 0💬

What is the return type of a program's main() method?
What is the return type of a program's main() method? A program's main() method has a void return type. 2012-12-21, 2581👍, 0💬

What is the difference between a Scrollbar and a ScrollPane?
What is the difference between a Scrollbar and a ScrollPane? A Scrollbar is a Component, but not a Container. A ScrollPane is a Container. A ScrollPane handles its own events and performs its own scrolling. 2013-04-05, 2579👍, 0💬

What are the legal operands of the instanceof operator?
What are the legal operands of the instanceof operator? The left operand is an object reference or null value and the right operand is a class, interface, or array type. 2013-01-01, 2579👍, 0💬

What is the common usage of serialization?
What is the common usage of serialization? Whenever an object is to be sent over the network, objects need to be serialized. Moreover if the state of an object is to be saved, objects need to be serilazed. 2013-05-21, 2575👍, 0💬

What is the argument type of a program's main() method?
What is the argument type of a program's main() method? A program's main() method takes an argument of the String[] type. 2012-10-24, 2574👍, 0💬

You are planning to do an indexed search in a list of objects. Which of the two Java collections should you use: ArrayList or Li
You are planning to do an indexed search in a list of objects. Which of the two Java collections should you use: ArrayList or LinkedList? ArrayList 2013-04-16, 2570👍, 0💬

How can a dead thread be restarted?
How can a dead thread be restarted? A dead thread cannot be restarted. 2013-01-15, 2570👍, 0💬

How can you force garbage collection?
How can you force garbage collection? You can't force GC, but could request it by calling System.gc(). JVM does not guarantee that GC will be started immediately. 2012-08-03, 2569👍, 0💬

How do I mix JSP and SSI #include? What is the difference between include directive & jsp:include action?
How do I mix JSP and SSI #include? What is the difference between include directive & jsp:include action? Difference between include directive and 1. provides the benifits of automatic recompliation,smaller class size ,since the code corresponding to the included page is not present in the servl... 2013-08-06, 2568👍, 0💬

What is a Manifest?
What is a Manifest? An assembly manifest contains all the metadata needed to specify the assembly's version requirements and security identity, and all metadata needed to define the scope of the assembly and resolve references to resources and classes. The assembly manifest can be stored in either a... 2013-10-08, 2566👍, 0💬

Does garbage collection guarantee that a program will not run out of memory?
Does garbage collection guarantee that a program will not run out of memory? Garbage collection does not guarantee that a program will not run out of memory. It is possible for programs to use up memory resources faster than they are garbage collected. It is also possible for programs to create obje... 2013-06-06, 2566👍, 0💬

What is the purpose of the enableEvents() method?
What is the purpose of the enableEvents() method? The enableEvents() method is used to enable an event for a particular object. Normally, an event is enabled when a listener is added to an object for a particular event. The enableEvents() method is used by objects that handle events by overriding th... 2013-01-07, 2566👍, 0💬

Why is catch(Exception) almost always a bad idea?
Why is catch(Exception) almost always a bad idea? Well, if at that point you know that an error has occurred, then why not write the proper code to handle that error instead of passing a new Exception object to the catch block? Throwing your own exceptions signifies some design flaws in the project. 2014-02-24, 2565👍, 0💬

Which Container method is used to cause a container to be laid out and redisplayed?
Which Container method is used to cause a container to be laid out and redisplayed? validate() 2013-04-12, 2563👍, 0💬

If an object is garbage collected, can it become reachable again?
If an object is garbage collected, can it become reachable again? Once an object is garbage collected, it ceases to exist. It can no longer become reachable again. 2013-01-02, 2562👍, 0💬

What is the difference between the String and StringBuffer classes?
What is the difference between the String and StringBuffer classes? String objects are constants. StringBuffer objects are not. 2012-11-06, 2562👍, 0💬

To what value is a variable of the String type automatically initialized
To what value is a variable of the String type automatically initialized The default value of a String type is null. 2012-10-10, 2561👍, 0💬

What environment variables do I need to set on my machine in order to be able to run Java programs?
What environment variables do I need to set on my machine in order to be able to run Java programs? CLASSPATH and PATH are the two variables. 2013-05-07, 2559👍, 0💬

Can an anonymous class be declared as implementing an interface and extending a class?
Can an anonymous class be declared as implementing an interface and extending a class? An anonymous class may implement an interface or extend a superclass, but may not be declared to do both. 2012-10-15, 2559👍, 0💬

What is the difference between yielding and sleeping?
What is the difference between yielding and sleeping? When a task invokes its yield() method, it returns to the ready state. When a task invokes its sleep() method, it returns to the waiting state. 2012-09-28, 2559👍, 0💬

Can main() method be overloaded?
Can main() method be overloaded? Yes. the main() method is a special method for a program entry. You can overload main() method in any ways. But if you change the signature of the main method, the entry point for the program will be gone. 2013-02-25, 2557👍, 0💬

How are Java source code files named?
How are Java source code files named? A Java source code file takes the name of a public class or interface that is defined within the file. A source code file may contain at most one public class or interface. If a public class or interface is defined within a source code file, then the source code... 2012-11-01, 2557👍, 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