Thursday, December 18, 2014

Creating LightSwitch Application using Visual Studio

We can easily build business applications by using the Visual Studio LightSwitch Development tool

Click on Visual Studio 2013 > Choose File, New, Project > In the list of templates, expand the Visual Basic or Visual C# node, Select LightSwitch node, and then choose the LightSwitch HTML Application template

It creates data folders and screen folders by default.

You can find data folders in the Solution explorer window

You can find screens folders in the explorer window

Create the entities under data folder.You can Create new table. The Entity Designer window opens.Define your data for your application.

Solution Explorer  choose Add Screen.The Add New Screen dialog box appears.In the Select a screen template list, choose Common Screen Set.Select the entity that you have defined earlier.

Save and Press f5 to run the application.

During you can add/edit/delete/browse the data. You can perform CRUD operations. It is so quick....

Monday, December 8, 2014

Big Data and Hadoop Interview Questions

 Q: What is Big Data and Why it is useful?

 Q: What is MapReduce?

 Q: What is Hadoop Framework?

 Q. What is JobTracker and its main functions

 Q. What is TaskTracker?

Q. What is Hadoop Streaming?

Q: What are the three modes in which Hadoop can be run?

Q:What is a metadata?

Q: What is a Datanode?

Q: What is a heartbeat in HDFS?

Q: Are Namenode and job tracker on the same host?

Q: What is a block in HDFS?