Execution Sequence of Entity Framework

When talking about Entity Framework its important to understand the operations happening,

Loading metadata
Happens only once in each application domain. Model and mapping metadata used by EF is loaded into MetadataWorkspace.

Opening the database connection
EF opens and closes database connection as needed. 

Generating views
This is usually a costly operation

Preparing the query

Executing the query

Loading and validating types

Tracking



Materializing the objects

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Introduction to Asynchronous Programming

http://msdn.microsoft.com/en-us/library/w9fyc75f%28v=vs.71%29.aspx

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Functional and Non Functional Requirements

Basically functional requirement is something specific the system should do. Functional requirement of a system could be,

• Business rules
• Administrative functions
• Authentication and Authorization
• Reporting

On the other hand non functional requirement describes how system works or how the system should behave. These can be,

• Performance
• Scalability
• Capacity
• Availability
• Maintainability
• Security 
• Usability etc. 

Non functional requirements can be identified as quality attributes of a system. Non functional requirements are defined in terms of metrics (something that can be measured about the system).

Resources
http://reqtest.com/requirements-blog/functional-vs-non-functional-requirements/#conversion-0
http://stackoverflow.com/questions/16475979/what-is-functional-and-non-functional-requirement

image credit : http://www.steffen-zschaler.de/bibliographies/nfp/sommerville.png

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