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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, 2271👍, 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, 2271👍, 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, 2271👍, 0💬

Is null a keyword?
Is null a keyword? The null value is not a keyword. 2013-02-14, 2267👍, 0💬

The two properties of a DataGrid that has to be specified to turn on sorting and paging respectively are ...
The two properties of a DataGrid that has to be specified to turn on sorting and paging respectively are ... The two properties of a DataGrid that has to be specified to turn on sorting and paging respectively are * EnableSorting = “true” and EnablePaging = “true” * DisableSorting = â... 2014-07-21, 2266👍, 0💬

How is it possible for two String objects with identical values not to be equal under the == operator?
How is it possible for two String objects with identical values not to be equal under the == operator? The == operator compares two objects to determine if they are the same object in memory. It is possible for two String objects to have the same value, but located indifferent areas of memory. 2012-12-28, 2266👍, 0💬

How do I do &lt; fill-in-the-blank &gt; for each element in a hash?
How do I do &lt; fill-in-the-blank &gt; for each element in a hash? Here's a simple technique to process each element in a hash: #!/usr/bin/perl -w %days = ( 'Sun' =>'Sunday', 'Mon' => 'Monday', 'Tue' => 'Tuesday', 'Wed' => 'Wednesday', 'Thu' => 'Thursday', 'Fri' => 'Friday', 'Sat' => 'Satur... 2013-09-03, 2265👍, 0💬

Can an Interface be final?
Can an Interface be final? yes. 2013-02-04, 2265👍, 0💬

Can there be an abstract class with no abstract methods in it?
Can there be an abstract class with no abstract methods in it? yes. 2013-02-01, 2262👍, 0💬

In C#, which character is used to indicate a verbatim string literal?
In C#, which character is used to indicate a verbatim string literal? In C#, which character is used to indicate a verbatim string literal? * @ * ! * " * # @ 2014-03-18, 2259👍, 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, 2259👍, 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, 2259👍, 0💬

The process that ASP.NET uses to keep track of Sessions without cookies is ..,
The process that ASP.NET uses to keep track of Sessions without cookies is .., The process that ASP.NET uses to keep track of Sessions without cookies is * Cookie Munging * Cookie Monking * Cookie Mocking * Cookie Munching Cookie munging 2014-06-16, 2258👍, 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, 2257👍, 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, 2256👍, 0💬

What are the advantages and drawbacks of using ADO.NET?
What are the advantages and drawbacks of using ADO.NET? Pros ==== ADO.NET is rich with plenty of features that are bound to impress even the most skeptical of programmers. If this weren’t the case, Microsoft wouldn’t even be able to get anyone to use the Beta. What we’ve done here is come ... 2013-12-13, 2254👍, 0💬

What is strong-typing versus weak-typing? Which is preferred? Why?
What is strong-typing versus weak-typing? Which is preferred? Why? Strong type is checking the types of variables as soon as possible, usually at compile time. While weak typing is delaying checking the types of the system as late as possible, usually to run-time. Which is preferred depends on what ... 2014-02-17, 2252👍, 0💬

What are class members and Instance members?
What are class members and Instance members? Any global members(Variables, methods etc.) which are static are called as Class level members and those which are non-static are called as Instance level members. 2013-03-19, 2252👍, 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, 2251👍, 0💬

Why aren't Perl's patterns regular expressions?
Why aren't Perl's patterns regular expressions? Because Perl patterns have backreferences. A regular expression by definition must be able to determine the next state in the finite automaton without requiring any extra memory to keep around previous state. A pattern /([ab]+)c\1/ requires the state m... 2013-09-02, 2249👍, 0💬

If we develop an application that must accommodate multiple security levels through secure login and ASP.NET web application is
If we develop an application that must accommodate multiple security levels through secure login and ASP.NET web application is spanned across three web-servers (using round-robin load balancing) what would be the best approach to maintain login-in state for the users? If we develop an application t... 2014-08-27, 2248👍, 0💬

How will you register COM+ services?
How will you register COM+ services? Through X-Copy Deployment. 2014-11-14, 2247👍, 0💬

What is OOPS?
What is OOPS? OOP is the common abbreviation for Object-Oriented Programming. 2013-02-27, 2247👍, 0💬

What restrictions are placed on method overloading?
What restrictions are placed on method overloading? Two methods may not have the same name and argument list but different return types. 2012-12-19, 2247👍, 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