Debug And Fix You

wcf

admin — Wed, 28 Dec 2011 01:50:42 +0000

What is ABC?
What are the five different contracts?
What is the advantage of XML Serialization over data contracts? Ans. Data Contracts
What are the three types of patterns?
What are the different Application Patterns? Ans. MVC, MVVM
What is the difference between Page Controller and Front Controller?
What takes more power? Cell or Wireless? Ans. Cell because the battery need to be charged. The Wireless is bandwidth per second.

Struct Vs Class

admin — Sat, 24 Dec 2011 11:49:41 +0000

1. Struct is a value type. Class is a reference.
2. Struct is created on stack. Class is created on the heap.
3. Struct can’t have parameterless default constructors. Class can have parameterless constructors.
4. Struct can’t be inherited like class. Struct can inherit from Object.
5. Struct is faster. Class is slow.

Microsoft Enterprise Library

admin — Thu, 22 Dec 2011 16:41:53 +0000

The Microsoft Enterprise Library has the following code blocks:

Caching
Cryptography
Data Access
Exception Handling
Logging
Policy Injection
Security
Unity
Validation

SQL Group by

admin — Mon, 19 Dec 2011 16:43:43 +0000

select name, sum(salary) from employee

The employee table may have 100 employees. Running the above statement return a single row for the sum(salary) and 100 rows for name. The sql can’t return this data set, so a ‘group by’ statement will help like this: select name, sum(salary) from employee group by name.

IEnumerable Vs IQueryable

admin — Mon, 19 Dec 2011 16:37:38 +0000

IEnumerable and IQueryable both work with data sources to return data. The IQueryable makes a tree expression and return efficient data while IEnumerable return ineffienct data. IEnumerable has to work in the inefficient data to return the efficient data again.