I wants process to display message box every after 30 seconds to call center representative until customer call is on Hold, which activity needs to be used?

Developer wants process to display message box every after 30 seconds to call center representative until customer call is on Hold, which activity needs to be used?

Do While
Delay
Comment
Break

Robot generates employee Id in the format of XXX-XX-XXXX, where the X represents Integer, which recommended data type should be used to store all new employee id

String
Int32
String
List

User want to extract text from scanned pdf, which screen scraping method should be used to perform the activity

Native Only
Full Text Only
Full Text and Native
OCR

Can anybody help me to get correct answer for some of this questions, Thanks in advance.

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