You have developed a new mobile app. It is a game where users try to remember a series of shapes, to help train their memory. You conduct a user trial by
releasing the app to the public, and you program the app to send you back data on
user interactions, time of day of usage, and geographical locations of usage. This
data will allow you to study the ways people use your app, and the contexts in
which they use it. Data collection and the nature of your trial are explained to the
user on first launch and must be agreed to before any data is collected.
Explain any potential ethical issues you see with this study design, and explain
changes you could make to conduct the study in a more ethically sound manner.

Technician a says that if a valve is open when a piston rises to the very top of a cylinder, the piston may actually strike the valve head and cause serious engine damage. technician b says if the camshaft is located in the engine block, then the engine is called an overhead valve engine, ohv engine, or an in-block camshaft. who is right? a. b only b. both a and b c. a only d. neither a nor b

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.

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