Which of the following clearance levels or classification labels is not generally used in a government- or military-based MAC scheme?

If a queue is implemented as the ADT list, which of the following queue operations can be implemented as list.remove(1)?

a) enqueue() b) dequeue() c) isEmpty() d) peek()

The __________ SQL operator can be used to disqualify search criteria in a WHERE clause.

a. AND b. NOT c. EXCLUDE d. NOR