Please fill in the blanks or answer the question asked.

$1.$ In computer memory management:

$\_\_\_\_\_\_\_\_$ thread management is done at the application level so that it does not interfere with the operating system.

Dynamic partitioning is more memory efficient than fixed partitioning but requires added considerations such as $\_\_\_\_\_\_\_\_.$

Internal fragmentation commonly occurs with $\_\_\_\_\_\_\_\_.$

If an organization has to assign file access control based upon an employee$$s duties and daily tasks, what is the most appropriate type?

A user who does not belong to an organization but uses deceptive means to gain access is termed as a $\_\_\_\_\_\_\_\_.$