Questions And Answers for PowerBuilder Interviews

Question

What is difference between 'prompt for criteria' and 'Query Mode'?

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Answer

'Prompt For Criteria' as the name says, prompts for the criteria--for all those columns that were marked--in its own display dialog box and ignores the DataWindow you have painted. It also ignores the tab sequence number, i.e., prompts even if the tab sequence is zero. 'QueryMode' is more flexible than the 'Prompt for Criteria', and it uses the DataWindow you have painted. It allows querying on all non-zero tab sequence columns in the DataWindow and you do not mark any column for this purpose. The former one promts for the values every time Retrieve() is called, where as the later one takes values only when you turn it on--by enabling QUERYMODE property.

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