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Can you make an instance of an abstract class? For example - java.util.Calender is an abstract class with a method getInstance()
Can you make an instance of an abstract class? For example - java.util.Calender is an abstract class with a method getInstance() which returns an instance of the Calender class. No! You cannot make an instance of an abstract class. An abstract class has to be sub-classed. If you have an abstract cla... 2012-08-21, 2347👍, 0💬

What is Session Facade pattern?
What is Session Facade pattern? Session facade is one design pattern that is often used while developing enterprise applications. It is implemented as a higher level component (i.e.: Session EJB), and it contains all the iteractions between low level components (i.e.: Entity EJB). It then provides a... 2013-03-15, 2346👍, 0💬

Under what conditions is an object's finalize() method invoked by the garbage collector?
Under what conditions is an object's finalize() method invoked by the garbage collector? The garbage collector invokes an object's finalize() method when it detects that the object has become unreachable. 2012-12-26, 2346👍, 0💬

ASP.NET interview questions only (2)
ASP.NET interview questions only (2) 1. What is a static class? 2. What is static member? 3. What is static function? 4. What is static constructor? 5. How can we inherit a static variable? 6. How can we inherit a static member? 7. Can we use a static function with a non-static variable? 8. How can ... 2014-01-08, 2344👍, 0💬

How does a try statement determine which catch clause should be used to handle an exception?
How does a try statement determine which catch clause should be used to handle an exception? When an exception is thrown within the body of a try statement, the catch clauses of the try statement are examined in the order in which they appear. The first catch clause that is capable of handling the e... 2013-01-28, 2344👍, 0💬

How do I send e-mail from a Perl/CGI program on a Unix system?
How do I send e-mail from a Perl/CGI program on a Unix system? Sending e-mail from a Perl/CGI program on a Unix computer system is usually pretty simple. Most Perl programs directly invoke the Unix sendmail program. We'll go through a quick example here. Assuming that you've already have e-mail info... 2013-09-04, 2343👍, 0💬

How to open and read data files with Perl
How to open and read data files with Perl Data files are opened in Perl using the open() function. When you open a data file, all you have to do is specify (a) a file handle and (b) the name of the file you want to read from. As an example, suppose you need to read some data from a file named "check... 2013-08-22, 2343👍, 0💬

How will you register COM+ services?
How will you register COM+ services? Through X-Copy Deployment. 2014-11-14, 2342👍, 0💬

How do you validate the controls in an ASP .NET page?
How do you validate the controls in an ASP .NET page? Using special validation controls that are meant for this. We have Range Validator, Email Validator. 2013-10-01, 2339👍, 0💬

How are this() and super() used with constructors?
How are this() and super() used with constructors? This() is used to invoke a constructor of the same class. super() is used to invoke a superclass constructor. 2013-06-13, 2339👍, 0💬

What will be the output on executing the following code...
What will be the output on executing the following code... What will be the output on executing the following code. public class MyClass { public static void main (String args[] ) { int abc[] = new int [5]; System.out.println(abc[0]); } } A Error array not initialized B 5 C 0 D Print some junk chara... 2013-03-11, 2337👍, 0💬

What are the two basic ways in which classes that can be run as threads may be defined?
What are the two basic ways in which classes that can be run as threads may be defined? A thread class may be declared as a subclass of Thread, or it may implement the Runnable interface. 2013-01-31, 2334👍, 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, 2333👍, 0💬

What is CLR?
What is CLR? Answer 1: CLR(Common Language Runtime) is the main resource of .Net Framework. it is collection of services like garbage collector, exception handler, jit compilers etc. with the CLR cross language integration is possible. Answer 2: The .NET Framework provides a runtime environment whic... 2013-12-18, 2330👍, 0💬

How do I set variables to, or test for IEEE NaN?
How do I set variables to, or test for IEEE NaN (``Not a Number'') and other special values? Many systems with high-quality IEEE floating-point implementations provide facilities (e.g. predefined constants, and functions like isnan(), either as nonstandard extensions in &lt;math.h> or perhaps in... 2015-06-21, 2328👍, 0💬

What is Viewstate?
What is Viewstate? A server control’s view state is the accumulation of all its property values. In order to preserve these values across HTTP requests, ASP.NET server controls use this property, which is an instance of the StateBag class, to store the property values. 2014-01-01, 2326👍, 0💬

What is the use of ErrorProvider Control?
What is the use of ErrorProvider Control? The ErrorProvider control is used to indicate invalid data on a data entry form. Using this control, you can attach error messages that display next to the control when the data is invalid, as seen in the following image. A red circle with an exclamation poi... 2013-12-18, 2326👍, 0💬

What is a Metadata?
What is a Metadata? Metadata is information about a PE. In COM, metadata is communicated through non-standardized type libraries. In .NET, this data is contained in the header portion of a COFF-compliant PE and follows certain guidelines; it contains information such as the assembly’s name, versi... 2013-10-25, 2326👍, 0💬

The following is a valid statement in ASP.NET&lt;%@ Page Language="C" %&gt;: * True or * False
The following is a valid statement in ASP.NET&lt;%@ Page Language="C" %&gt;: * True or * False False 2014-08-18, 2323👍, 0💬

How can printf use f for type double, if scanf requires lf?
Someone told me it was wrong to use %lf with printf. How can printf use %f for type double, if scanf requires %lf? It's true that printf's %f specifier works with both float and double arguments Due to the ``default argument promotions'' (which apply in variable-length argument lists values of type ... 2015-11-06, 2319👍, 0💬

What is .NET / .NET Framework?
What is .NET / .NET Framework? It is a Framework in which Windows applications may be developed and run. The Microsoft .NET Framework is a platform for building, deploying, and running Web Services and applications. It provides a highly productive, standards-based, multi-language environment for int... 2013-10-28, 2317👍, 0💬

How ASP .NET different from ASP?
How ASP .NET different from ASP? Scripting is separated from the HTML, Code is compiled as a DLL, these DLLs can be executed on the server. 2013-09-27, 2316👍, 0💬

What’s wrong with a line like this? DateTime.Parse(myString)
What’s wrong with a line like this? DateTime.Parse(myString) the result returned by this function is not assigned to anything, should be something like varx = DateTime.Parse(myString) 2014-02-28, 2313👍, 0💬

How does output caching work in ASP.NET?
How does output caching work in ASP.NET? Output caching is a powerful technique that increases request/response throughput by caching the content generated from dynamic pages. Output caching is enabled by default, but output from any given response is not cached unless explicit action is taken to ma... 2013-12-30, 2313👍, 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