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How To Save Query Output to a Local File
How To Save Query Output to a Local File? - Oracle DBA FAQ - Introduction to Command-Line SQL*Plus Client Tool Normally, when you run a SELECT statement in SQL*Plus, the output will be displayed on your screen. If you want the output to be saved to local file, you can use the "SPOOL fileName" comman... 2007-04-29, 6586👍, 0💬

How to prevent my .NET DLL to be decompiled
How to prevent my .NET DLL to be decompiled? By design .NET embeds rich Meta data inside the executable code using MSIL. Any one can easily decompile your DLL back using tools like ILDASM (owned by Microsoft) or Reflector for .NET which is a third party. Secondly there are many third party tools whi... 2007-10-22, 6585👍, 0💬

Waiting State in a Thread
What are three ways in which a thread can enter the waiting state? A thread can enter the waiting state by invoking its sleep() method, by blocking on IO, by unsuccessfully attempting to acquire an object's lock, or by invoking an object's wait() method. It can also enter the waiting state by invoki... 2007-03-03, 6575👍, 0💬

What Are the Differences between CHAR and NCHAR
What Are the Differences between CHAR and NCHAR? - Oracle DBA FAQ - Understanding SQL Basics Both CHAR and NCHAR are fixed length character data types. But they have the following differences: CHAR's size is specified in bytes by default. NCHAR's size is specified in characters by default. A charact... 2016-06-25, 6569👍, 0💬

What is XMLTextReader
What is XMLTextReader? XPOINTER is used to locate data within XML document. XPOINTER can point to a particular portion of a XML document, for instance address.xml#xpointer(/descenda nt::streetnumber[@id=9])The “XmlTextReader” class helps to provide fast access to streams of XML data in a forward-onl... 2007-10-31, 6548👍, 0💬

What is encapsulation technique
What is encapsulation technique? Hiding data within the class and making it available only through the methods. This technique is used to protect your class against accidental changes to fields, which might leave the class in an inconsistent state. 2007-11-16, 6487👍, 0💬

How To Write a JUnit Test Method
How To Write a JUnit Test Method? This interview question is to check if you know the basic rules about writing a JUnit test method: You need to mark the method as a JUnit test method with the JUnit annotation: @org.junit.Test. A JUnit test method must be a "public" method. This allows the runner cl... 2008-01-22, 6471👍, 0💬

What does a socket consists of
What does a socket consists of? The combination of an IP address and a port number is called a socket. 2007-11-11, 6470👍, 0💬

What is the main difference between MSML and .NET Framework XML classes
What is the main difference between MSML and .NET Framework XML classes? MSXML supports XMLDOM and SAX parsers while .NET framework XML classes support XML DOM and XML readers and writers. MSXML supports asynchronous loading and validation while parsing. For instance you can send synchronous and asy... 2007-10-31, 6468👍, 0💬

What Happens to the Current Transaction If a DDL Statement Is Executed
What Happens to the Current Transaction If a DDL Statement Is Executed? - MySQL FAQs - Transaction Management: Commit or Rollback If a DDL statement is executed, the current transaction will be committed and ended. All the database changes made in the current transaction will become permanent. This ... 2007-05-11, 6461👍, 0💬

Native Method
What is a native method? A native method is a method that is implemented in a language other than Java. 2007-03-03, 6452👍, 0💬

What is Indexer
What is Indexer ? An indexer is a member that enables an object to be indexed in the same way as an array. 2007-10-23, 6441👍, 0💬

Placing a Table in the Center of a Page
How do I center a table? You place a table in the center of a page with the help of CSS as shown in this example: In your HTML, use &lt;div class="center"> &lt;table>...&lt;/tabl e>&lt;/div> In your CSS, use div.center { text-align: center; } div.center table { margin-left: auto; mar... 2007-03-03, 6431👍, 0💬

Two Sets of Links with Different Colors
How can I have two sets of links with different colors? You can suggest this presentation in a style sheet. First, specify colors for normal links, like this: a:link {color: blue; background: white} a:visited {color: purple; background: white} a:active {color: red; background: white} Next, identify ... 2007-03-03, 6426👍, 0💬

How To Break Output into Pages
How To Break Output into Pages? - MySQL FAQs - Managing Tables and Running Queries with PHP Scripts If you have a query that returns hundreds of rows, and you don't want to present all of them to your users on a single page. You can break output into multiple pages, and only present 10 rows per page... 2007-05-10, 6421👍, 0💬

What is the difference between “Web farms” and “Web garden”?
What is the difference between “Web farms” and “Web garden”? “Web farms” are used to have some redundancy to minimize failures. It consists of two or more web server of the same configuration and they stream the same kind of contents. When any request comes there is switching / routing logic which... 2007-10-24, 6415👍, 0💬

What is Post Cache substitution
What is Post Cache substitution? Post cache substitution is used when we want to cache the whole page but also need some dynamic region inside that cached page. Some examples like QuoteoftheDay, RandomPhotos, and AdRotator etc. are examples where we can implement Post Cache Substitution. Post-cache ... 2007-10-23, 6404👍, 0💬

Creating Links to Send Emails
How do I create a link that sends me email? Use a mailto link, for example: Send me email at: &lt;A HREF="mailto:me@fyicenter.com" >me@fyicenter.com&lt;/A>. 2007-03-03, 6403👍, 0💬

How can we identify that the Page is PostBack
How can we identify that the Page is PostBack ? Page object has a “IsPostBack” property which can be checked to know that is the page posted back. 2007-10-24, 6402👍, 0💬

What Are Transaction Isolation Levels Supported by Oracle
What Are Transaction Isolation Levels Supported by Oracle? - Oracle DBA FAQ - Understanding SQL Transaction Management Oracle supports two transaction isolation levels: READ COMMITTED (the default option). If the transaction contains DML that requires row locks held by another transaction, then the ... 2007-04-17, 6399👍, 0💬

Persistent Cookies
What Is a Persistent Cookie? A persistent cookie is a cookie which is stored in a cookie file permanently on the browser's computer. By default, cookies are created as temporary cookies which stored only in the browser's memory. When the browser is closed, temporary cookies will be erased. You shoul... 2007-02-27, 6399👍, 0💬

What Happens to Your Transactions When ERROR 1205 Occurred
What Happens to Your Transactions When ERROR 1205 Occurred? - MySQL FAQs - Transaction Management: Commit or Rollback If your transaction receives the "Lock wait timeout exceeded" - ERROR 1205, MySQL server automatically terminates your transaction and rolls back your data changes of the entire tran... 2007-05-11, 6391👍, 0💬

Some nested data structure
Assume that $ref refers to a scalar, an array, a hash or to some nested data structure. Explain the following statements: $$ref; # returns the scalar pointed by $ref. $$ref[0]; # returns the first element of the array pointed by $ref. $ref-&gt;[0]; # returns the first element of the array pointe... 2007-11-21, 6373👍, 0💬

Define XPATH
Define XPATH? It is an XML query language to select specific parts of an XML document. Using XPATH you can address or filter elements and text in a XML document. For instance a simple XPATH expression like “Invoice/Amount” states find “Amount” node which are children of “Invoice” node. 2007-10-31, 6371👍, 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