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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, 2211👍, 0💬

What is the difference between a constructor and a method?
What is the difference between a constructor and a method? A constructor is a member function of a class that is used to create objects of that class. It has the same name as the class itself, has no return type, and is invoked using the new operator. A method is an ordinary member function of a cla... 2013-04-29, 2208👍, 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, 2208👍, 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, 2208👍, 0💬

What are different methods of session maintenance in ASP.NET?
What are different methods of session maintenance in ASP.NET? 3 types: In-process storage. Session State Service. Microsoft SQL Server. In-Process Storage The default location for session state storage is in the ASP.NET process itself. Session State Service As an alternative to using in-process stor... 2014-01-01, 2207👍, 0💬

What are scalar data and scalar variables?
What are scalar data and scalar variables? Perl has a flexible concept of data types. Scalar means a single thing, like a number or string. So the Java concept of int, float, double and string equals to Perl's scalar in concept and the numbers and strings are exchangeable. Scalar variable is a Perl ... 2013-08-28, 2205👍, 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, 2205👍, 0💬

What is a compilation unit?
What is a compilation unit? A compilation unit is a Java source code file. 2013-01-11, 2204👍, 0💬

What is a marker interface ?
What is a marker interface ? An interface that contains no methods. Eg: Serializable, Cloneable, SingleThreadModel etc. It is used to just mark java classes that support certain capability. 2013-03-11, 2202👍, 0💬

How do I sort a hash by the hash key?
How do I sort a hash by the hash key? Suppose we have a class of five students. Their names are kim, al, rocky, chrisy, and jane. Here's a test program that prints the contents of the grades hash, sorted by student name: #!/usr/bin/perl -w %grades = ( kim => 96, al => 63, rocky => 87, chrisy => 96, ... 2013-09-03, 2201👍, 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... 2013-02-08, 2200👍, 0💬

What is the difference between ADO and ADO.NET?
What is the difference between ADO and ADO.NET? ADO uses Recordsets and cursors to access and modify data. Because of its inherent design, Recordset can impact performance on the server side by tying up valuable resources. In addition, COM marshalling - an expensive data conversion process - is need... 2013-10-07, 2197👍, 0💬

If you're overriding the method equals() of an object, which other method you might also consider?
If you're overriding the method equals() of an object, which other method you might also consider? hashCode() 2013-04-15, 2194👍, 0💬

What are new language features in J2SE 5.0?
What are new language features in J2SE 5.0? Generally: 1. generics 2. static imports 3. annotations 4. typesafe enums 5. enhanced for loop 6. autoboxing/unboxing 7. varargs 8. covariant return types 2013-03-07, 2194👍, 0💬

Which of the following operators has the highest precedence?
Which of the following operators has the highest precedence? * Pre Increment (++x) * Shift bits left: &lt;&lt; * Bitwise Or: | * Post Increment (x++) Shift bits left 2014-03-19, 2188👍, 0💬

How can I read a single character from the keyboard without waiting for the RETURN key?
How can I read a single character from the keyboard without waiting for the RETURN key? How can I stop characters from being echoed on the screen as they're typed? Alas, there is no standard or portable way to do these things in C. Concepts such as screens and keyboards are not even mentioned in the... 2015-04-29, 2187👍, 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, 2187👍, 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, 2187👍, 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, 2185👍, 0💬

What is the difference between static and non-static variables?
What is the difference between static and non-static variables? A static variable is associated with the class as a whole rather than with specific instances of a class. Non-static variables take on unique values with each object instance. 2012-12-11, 2185👍, 0💬

Name few Garbage collection algorithms?
Name few Garbage collection algorithms? Here they go: Mark and Sweep Reference counting Tracing collectors Copying collectors Heap compaction Mark-compact collectors 2013-03-20, 2183👍, 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. 2013-01-28, 2183👍, 0💬

For which statements does it make sense to use a label?
For which statements does it make sense to use a label? The only statements for which it makes sense to use a label are those statements that can enclose a break or continue statement. 2012-11-27, 2183👍, 0💬

How do SQL Server 2000 and XML linked? What is SQL Server agent?
How do SQL Server 2000 and XML linked? What is SQL Server agent? Every Request or the Response to or from SQL Server is converted into XML format. Its purpose is to ease the implementation of tasks for the DBA, with its full-function scheduling engine, which allows you to schedule your own jobs and ... 2014-11-17, 2180👍, 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