The virus that infected Iranian nuclear facilities was exploiting vulnerability in SCADA systems

Synchronous communications that involve conferencing between parties causing text-based messages to pop-up on a user's machine is referred to as ________

A) mailing B) subscribing C) posting D) instant messaging

In a ________ database, the user can place the same field in two tables and then join the tables using the related fields

A) unique B) referential C) cascading D) relational