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How can we use .NET components in COM
What is CCW (COM callable wrapper) ? or How do we ensure that .NET components is compatible with COM ? .NET components can not be used in straight forward way with COM. You will need to create CCW in order that COM components communicate with .NET assemblies. Following are the different approaches t... 2007-10-22, 6216👍, 0💬

What Is Rollback
What Is Rollback? - MySQL FAQs - Database Basics and Terminologies Rollback is a way to terminate a transaction with all database changes not saving to the database server. 2007-05-10, 6214👍, 0💬

Relation between HTML and SGML
What Is the Relation between HTML and SGML? SGML (Standard Generalized Markup Language) is a metalanguage in which one can define markup languages, like HTML, for documents. SGML is a descendant of IBM's Generalized Markup Language (GML), developed in the 1960s by Charles Goldfarb, Edward Mosher and... 2007-03-03, 6214👍, 0💬

define() - Defining Constants
How do you define a constant in PHP? You can define a constant by using the define() function. Once a constant is defined, it can never be changed or undefined. For example: &lt;?php define("CONSTANT", "Hello world."); echo CONSTANT; // outputs "Hello world." echo Constant; // outputs "Constant"... 2007-02-27, 6214👍, 0💬

How To Create an Image with Text
How To Create an Image with Text? - PSP Tutorials - Fading Images to Background Colors with PSP You can follow the steps below to create a new image with some text: Go to menu: File > New. You will get the New Image dialog box. Enter Width: 728; Height: 90; Background color: White. Click OK. You wil... 2007-05-12, 6206👍, 0💬

How To Update Existing Rows in a Table
How To Update Existing Rows in a Table? - MySQL FAQs - Managing Tables and Running Queries with PHP Scripts Updating existing rows in a table requires to run the UPDATE statement with a WHERE clause to identify the row. The following sample script updates one row with two new values: &lt;?php in... 2007-05-11, 6205👍, 0💬

What is Oracle Forms and what is it used for?
What is Oracle Forms and what is it used for? Oracle Forms is a 4GL Rapid Application Development (RAD) environment. Forms Builder is used to create applications to enter, access, change, or delete data from Oracle (and other) databases. The Forms Runtime environment is required to execute compiled ... 2011-03-15, 6202👍, 0💬

How To Quote Date and Time Values in SQL Statements
How To Quote Date and Time Values in SQL Statements? - MySQL FAQs - Managing Tables and Running Queries with PHP Scripts If you want to provide date and time values in a SQL statement, you should write them in the format of "yyyy-mm-dd hh:mm:ss", and quoted with single quotes ('). The tutorial exerc... 2007-05-11, 6202👍, 0💬

How To Use Subqueries with the EXISTS Operator
How To Use Subqueries with the EXISTS Operator? - MySQL FAQs - SQL SELECT Statements with JOIN and Subqueries A subquery can be used with the EXISTS operator as "EXISTS (subquery)", which returns true if the subquery returns one or more rows. The following statement is a good example of "EXISTS (sub... 2007-05-11, 6201👍, 0💬

require(), include() and include_once() Functions
What are the differences between require(), include() and include_once() functions in PHP? All three functions are used to include and evaluate a file into the current script execution. The include_once() statement includes and evaluates the specified file during the execution of the script. This is... 2007-02-27, 6201👍, 0💬

How To Initialize Variables with Default Values
How To Initialize Variables with Default Values? - Oracle DBA FAQ - Understanding PL/SQL Language Basics There are two ways to assign default values to variables at the time of declaration: Using key word DEFAULT - Appending "DEFAULT value" to the end of declaration statements. Using assignment oper... 2007-04-30, 6198👍, 0💬

Describe the various components in sequence diagrams
Describe the various components in sequence diagrams? Object lifeline: It represents the lifetime of an object creation and its destruction. If the object is created or destroyed during the time period the diagram represents, then the lifeline stops or starts at the appropriate point. An object's de... 2007-10-26, 6197👍, 0💬

How To Enter Element Content
How To Enter Element Content? - XHTML Tutorials - Introduction To Tag and Attribute Syntax Most of XHML elements allow you to specify contents. But there are some XHTML elements that do not allow any contents. If an XHTML element does allow element content, you need to enter the content between the ... 2007-05-12, 6197👍, 0💬

How do you convert numbers between different bases in JavaScript?
How do you convert numbers between different bases in JavaScript? Use the parseInt() function, that takes a string as the first parameter, and the base as a second parameter. So to convert hexadecimal 3F to decimal, use parseInt ("3F", 16); 2008-04-29, 6193👍, 0💬

What Happens When FireFox Knows a Web Page Has Atom Feeds
What Happens When FireFox Knows a Web Page Has Atom Feeds? - RSS FAQs - Atom Feed Introduction and File Generation When you use a FireFox browser visiting a Web page that has an Atom feed define, FireFox will display a "live bookmark" icon in the status bar. You can click the "live bookmark" to add ... 2007-05-12, 6193👍, 0💬

What Is Primary Key
What Is Primary Key? - MySQL FAQs - Database Basics and Terminologies A primary key is a single column or multiple columns defined to have unique values that can be used as row identifications. 2007-05-10, 6189👍, 0💬

sleep() and yield() Methods
What is the difference between yielding and sleeping? When a thread invokes its yield() method, it returns to the ready state. When a thread invokes its sleep() method, it returns to the waiting state. 2007-03-03, 6187👍, 0💬

What is the difference between a NULL pointer and a void pointer
What is the difference between a NULL pointer and a void pointer? A NULL pointer is a pointer of any type whose value is zero. A void pointer is a pointer to an object of an unknown type, and is guaranteed to have enough bits to hold a pointer to any object. A void pointer is not guaranteed to have ... 2007-11-13, 6186👍, 0💬

What is the design role played by Struts
What is the design role played by Struts? The role played by Structs is controller in Model/View/Controller(MVC) style. The View is played by JSP and Model is played by JDBC or generic data source classes. The Struts controller is a set of programmable components that allow developers to define exac... 2007-11-30, 6185👍, 0💬

Performance Testing
What are major factors to consider when doing performance testing What is Performance Testing? Testing conducted to evaluate the compliance of a system or component with specified performance requirements. Often this is performed using an automated test tool to simulate large number of users. Also k... 2009-03-23, 6184👍, 0💬

What Is Atom
What Is Atom? - RSS FAQs - Introduction to RSS (Really Simple Syndication) Basics Atom is an XML-based document format that describes lists of related information known as "feeds". Feeds are composed of a number of items, known as "entries", each with an extensible set of attached metadata. For exam... 2007-05-12, 6184👍, 0💬

What Is InnoDB
What Is InnoDB? - MySQL FAQs - Database Basics and Terminologies InnoDB is a transaction safe storage engine developed by Innobase Oy (an Oracle company now). 2007-05-10, 6178👍, 0💬

What is multiprogramming
What is multiprogramming? Multiprogramming is a rapid switching of the CPU back and forth between processes. 2007-11-11, 6177👍, 0💬

In what instances you will declare a constructor to be private
In what instances you will declare a constructor to be private? When we create a private constructor, we can not create object of the class directly from a client. So you will use private constructors when you do not want instances of the class to be created by any external client. Example UTILITY f... 2007-10-23, 6172👍, 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