(Please don't take this down yet) Anyone here have Discord? If so, would you like to chat? (I'm so bored-)

Which of the following is a way the operating system prevents unknown or unauthorized users from accessing the system?

Type the correct answer in the box. spell all words correctly. which view of report creation allows you to customize the report before the database program creates it? creating a report in allows you to customize the report before the database program creates it. pl asap

Acomputer has a two-level cache. suppose that 60% of the memory references hit on the first level cache, 35% hit on the second level, and 5% miss. the access times are 5 nsec, 15 nsec, and 60 nsec, respectively, where the times for the level 2 cache and memory start counting at the moment it is known that they are needed (e. g., a level 2 cache access does not even start until the level 1 cache miss occurs). what is the average access time?