Data collection devices are used to read or scan data from a source document. 

In SharePoint, ________ lists display columns as a questionnaire or poll rather than a list of columns and rows

Fill in the blank(s) with correct word

An operation X upon an object o causes o to invoke an operation upon another object o?. It is now proposed to replicate o but not o?. Explain the difficulty that this raises concerning invocations upon o?, and suggest a solution.

What will be an ideal response?