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Patten/Practices Interview Questions and Answers

What is W3C Standard?

Author: abhays          Posted Date: August 15, 2014    Category: Patten/Practices     Points: 40

The World Wide Web Consortium (W3C) is an international community where Member organizations, a full-time staff, and the public work together to develop Web standards. Led by Web inventor Tim Berners-Lee and CEO Jeffrey Jaffe, W3C's mission is to lead the Web to its full potential.

What is SOA (service oriented architecture)

Author: Ashutosh Jha          Posted Date: March 30, 2014    Category: Patten/Practices     Points: 40

SOA - Services Oriented Architecture, is a kind of service oriented architecture used to support different kind of computing platforms and applications. Web services in asp.net are one of the technologies that supports that kind of architecture. we can call asp.net web services from any computing platforms and applications.

What advantages have Web services over Component Object Model (COM) and Distributed Component Object Model (DCOM)?

Author: Ashutosh Jha          Posted Date: March 30, 2014    Category: Patten/Practices     Points: 40

The advantages of Web services over COM and DCOM are as follows:
1.Web services are simple to use and can be implemented on varied platforms.
2.Web services are loosely coupled; as a result, their interfaces and methods can be extended.
3.Web services do not carry any state information with them so that multiple requests can be processed simultaneously.

When should design patterns be used?

Author: Akhil Raj          Posted Date: January 17, 2014    Category: Patten/Practices     Points: 40

While developing software applications, sound knowledge of industry proven design patterns make the development journey easy and successful. Whenever a requirement is recurring, a suitable design pattern should be identified. Usage of optimal design patterns enhance performance of the application. Though there are some caveats. Make sure that there are no overheads imposed on a simple requirement, which means that design patterns should not be unnecessarily be used.

What is the Lazy Design Pattern?

Author: Akhil Raj          Posted Date: January 15, 2014    Category: Patten/Practices     Points: 40

The approach of the Lazy Design Pattern is not to create objects until a specific requirement matches, and when it matches, object creation is triggered.

What is anti-patters?

Author: Akhil Raj          Posted Date: January 15, 2014    Category: Patten/Practices     Points: 40

The term 'anti-pattern' is used to describe a poor programming practice.

You found a code of List which is slower in enumeration. How to make it faster? (Arch level)

Author: Jean Paul          Posted Date: May 11, 2011    Category: Patten/Practices     Points: 40

Use HashSet class.

What is Microkernel architectural pattern?

Author: Jean Paul          Posted Date: May 11, 2011    Category: Patten/Practices     Points: 40

Microkernel is a pattern where the core functionalities will be kept minimal and we will use extensible features to provide the additional functionalities.

It is recommended where an application will have different views or tends to change with time. This could be accomplished by keeping the core features unchanged.

Which is the design pattern that is type-safe and still extensible on runtime?

Author: Jean Paul          Posted Date: May 04, 2011    Category: Patten/Practices     Points: 40

Decorator Pattern design pattern that is type-safe and still extensible on runtime
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