A field that is ________, is empty and contains no value

A(n) ________ anomaly forces you to change data in multiple records, such as when you need to change the name of a product and you must change multiple rows

A) insertion B) update C) delete D) cascade

The port number at which the server waits for connections is often called the __________ point.

a. handhold. b. handshake. c. handoff. d. handle.