The singleton pattern is a software design pattern that restricts the instantiation of a class to one “single” instance. This is useful when exactly one object is needed to coordinate actions across the system. In C#, you use the “static” declaration. The singleton design pattern solves problems like:[5] How can it be ensured that a... » read more
An architectural pattern commonly used for developing user interfaces that divides an application into three interconnected parts. This is done to separate internal representations of information from the ways information is presented to and accepted from the user. The MVC design pattern decouples these major components allowing for efficient code reuse and parallel development. A variation is the... » read more
A distributed system is an application that executes a collection of protocols to coordinate the actions of multiple processes on a network, such that all components cooperate together to perform a single or small set of related tasks. Why build a distributed system? There are lots of advantages including the ability to connect remote users... » read more
https://extension.ucsd.edu/news-and-events/extension-blog/october-2015/lessons-from-the-pros-how-to-handle-job-interviews 1. It is not all about youKurt Gering, director of talent, culture and capability at the San Diego International Airport, likens a job interview to that of a first date where you begin to find out if a potential relationship makes sense. Because of that, you need to focus not just on your talents but... » read more
In general, the only difference between the Community and Professional editions of Visual Studio is one of licensing. According to my contacts at Microsoft, there is no operational difference between the two editions. The Community edition (which is a free download) can be used by individual developers and small teams (5 people or less, as... » read more
TempDB is used for many operations, such as user-created temporary objects, internal temporary objects and version stores and certain features like online re-indexing, multiple active record sets (MARS) and others. Because of all these uses, TempDB should be installed on a fast drive (like SSD) and even set to multiple disk drives. You should also... » read more
Removing Unnecessary Indexes Index maintenance requires lots of CPU and I/O. Every time we insert data into a database, SQL Server also needs to update the indexes, so it is better to remove them if they are not used. SQL Server Installation And Database Setup When setting up a database, we need to keep data... » read more
These four principles are referred to as ‘ACID’, and each letter is an acronym for one property of RDBMS systems that is non-negotiable for the sake of the integrity of the system. Atomic(ity) – The principle that each transaction is ‘all-or-nothing’, i.e. it either succeeds or it fails, regardless of external factors such as power... » read more
Some best practices for moving data from one table to another table. Use TRUNCATE instead of DELETE If you need to clear the data in a table, use TRUNCATE instead of DELETE. TRUNCATE lock the table instead of at each row. No triggers are activated and no logs are generated resulting in faster performance. Note:... » read more
Unit Testing is a level of software testing where individual units/ components of a software are tested. The purpose is to validate that each unit of the software performs as designed. A unit is the smallest testable part of any software. It usually has one or a few inputs and usually a single output. Unit Testing... » read more