What method returns the number of items in LINQ query result q?

Which function calculates a periodic rate for an investment or loan given the number of payments, fixed periodic payments, and present value?

A) NPER B) RATE C) IPMT D) PV

Match each item with a statement below.

A. The process by which an attacker changes the format of the network packets and/or timing of their activities to avoid being detected by the IDPS. B. The process of reducing IDPS events in order to receive a better confidence in the alerts received. C. An alert or alarm that occurs in the absence of an actual attack. D. A value that sets the limit between normal and abnormal behavior. E. The process of adjusting an IDPS to maximize its efficiency in detecting true positives while minimizing both false positives and false negatives. F. An indication that a system has detected a possible attack. G. IDPS events that are accurate and noteworthy but do not pose a significant threat to information security. H. A value placed on an IDPS event's ability to correctly detect and identify certain types of attacks. I. The failure of an IDPS to react to an actual attack event.