What is the return type of a method that returns nothing?

If the destination table exists and you run the make table query, Access automatically deletes the source table

Indicate whether the statement is true or false

Assume that, in addition to the operations read(x) and write(x), a database has the operation increment(x,C), which (atomically) increments the value stored in record x by the constant C, which might be positive or negative. Design a conflict table for these operations for use in an immediate-update pessimistic concurrency control.

What will be an ideal response?