PowerBuilder Interview Question and Answers
| 76. |
Explain Computed Column |
| |
Computed clumn is a column that we define as a part of the SELECT statement. This values are calculated by the database and send to the PowerBuilder. |
| |
|
| 77. |
Explain Computed Field? |
| |
Computed fields are defined in DataWindow bands and PowerBuilder calculates these values, not the database server.
|
| |
|
| 78. |
How many DataWindow can share the data from a DataWindow? |
| |
There is no limitation. |
| |
|
| 79. |
What is DDE? |
| |
DDE means Dynamic Data Exchange. This technology allows two different applications talk to each other under MS-Windows environment and exchange data between them. |
| |
|
| 80. |
Explain TriggerEvent()? |
| |
TriggerEvent() executes the specifed event’s script right way. All pre-defined events are defined as enumerated data types under TriggerEvent().
TriggerEvent() function executes synchronously, the next command after this command will not be executed untill thios command is executed completly.
Return type is :
Return 1 Successfully Executed.
Return -1 Invalid. |
| |
|
| 81. |
Explain PostEvent()? |
| |
PostEvent() will be executed after completing the current script execution. PostEvent() executes asychronously. PostEvent() scripts are bending in the message queue. |
| |
|
| 82. |
Explain Diffrent levels of attribute method protections? |
| |
Public, Protected, Private, PrivateRead, PrivateWrite, ProtectedRead, ProtectedWrite. |
| |
|
| 83. |
How do you pass a value to a window at opening time? |
| |
Use either OpenWithParm() or OpenSheetWithParm(). |
| |
|
| 84. |
How to execute the ancestor event’s script from the decendent’s event? |
| |
We can use CALL SUPER::EVENT_NAME |
| |
|
| 85. |
Can we have Global and Local/Instance variable with the same name? |
| |
YES.
This.var_1 = 100 //Instance Variable.
var_1 = 100 //Local Variable.
::var_1 = 100 //Global Variable. |
| |
|
Gk Questions with Answers