Technology Questions

Data mining is a method for comparing large amounts of data for the purpose of finding patterns. Data mining is normally used for models and forecasting. Data mining is the process of correlations, patterns by shifting through large data repositories using pattern recognition techniques.

Data warehousing is the central repository for the data of several business systems in an enterprise. Data from various resources extracted and organized in the data warehouse selectively for analysis and accessibility.

The protocol specifies that frames need to be numbered. This is done by using sequence numbers. A field is added to the data frame to hold the sequence number of that frame. Since we want to minimize the frame size, the smallest range that provides unambiguous communication. The sequence numbers can wrap around.

In GUI testing, need to cover the customer requirement if don't have to validate  Font size, colors, spellings(labels) etc.

Every application should follow Microsoft rules like

- Controls should be Initcap (i.e every label should start with Capital letter )Can observe that in Win applications every label starts with Caps

- OK or Cancel button should exist

- Controls should not be overlapped

- Controls should be alligned properly (left side alignment is mandatory but the right side is optional)

- Controls should be visible

- Short cut keys should be provided

- System menu should exist (i.e if u press Alt key + Space bar a menu will appear at the left most corner )

- Mouse pointer events 

Colors, Label Names, Tab Order, Alignment, graphs , Navigation of the software to test in GUI Testing.

Android uses Dalvik Virtual Machine (DVM) which requires a special bytecode. We need to convert Java class files into Dalvik Executable files using an Android tool called "dx". In normal circumstances, developers will not be using this tool directly and build tools will care for the generation of DVM compatible files.

_VIEWSTATE is the command used to implement view state

With respect to multithreading, synchronization is the capability to control the access of multiple threads to shared resources. Without synchronization, it is possible for one thread to modify a shared object while another thread is in the process of using or updating that object's value. This often leads to significant errors.

Steps to step through the code in .NET:

1. Start the program in debug mode.


2. When the first breakpoint is reached then step through can be done in one of the two ways:

•  Press F10 to move to next line.


•  Select debug menu and click on step over. This would step over the breakpoint to next level.

       3. Other options are: “Step Into” and “Step Out”.