Why is the len ( ) function useful when using a loop to iterate through a stack?
the len ( ) function will print the elements of the stack.
the len ( ) function will run with each iteration, printing the element number each time.
the len ( ) function will tell the program the number of elements in the stack.
the len ( ) function will remove the duplicate elements in the stack.

You have a linux system that has a 1000gb hard disk drive, which has a 90gb partition containing an ext4 filesystem mounted to the / directory and a 4gb swap partition. currently, this linux system is only used by a few users for storing small files; however, the department manager wants to upgrade this system and use it to run a database application that will be used by 100 users. the database application and the associated data will take up over 200gb of hard disk space. in addition, these 100 users will store their personal files on the hard disk of the system. each user must have a maximum of 5gb of storage space. the department manager has made it very clear that this system must not exhibit any downtime as a result of hard disk errors. how much hard disk space will you require, and what partitions would you need to ensure that the system will perform as needed? where would these partitions be mounted? what quotas would you implement? what commands would you need to run and what entries to /etc/fstab would you need to create? justify your answers.

20 points archie wants to use a reflector as he photographs a newlywed couple. what would he consider in his choice? a. shadow and sunny b. homemade and professional c. lamps and boards d. incident and reflected e. neutral density and enhancement

Which of these might be an example of an advertiser's target group? a.people who have no access to media b.people the advertisers know nothing about c. people who watch a variety of tv shows d. people who live in the same region of the country