Two hundred memory units are available to the Operating System. Process A is using 50 units and can claim 60. Process B is using 10 units and can claim 30 units. Process C is using 40 units and can claim 60. Process D is using 80 units and can claim 100. Process A requests an additional 20 units. Can the Operating System grant the request? Why? Show all your work.  You may assume you are currently in a safe state.

Are the real-time periodic tasks A, B, and C schedulable if A arrives every 10 units and takes 4 units, B arrives every 20 units and takes 3 units, and C arrives every 5 units and takes 3 units. Show all the steps.

Assume we are dealing with a system that places programs in memory following a first-fit dynamic partitioning scheme. At some point in time, we have just loaded a program that needed 48 MB, and memory is as depicted below (not to scale). Shaded (blue) regions are full, blanks are holes (with sizes in megabytes as indicated); the cross-hatched region is the location of the most recently loaded program, it is at least 48 MB in size. Show, on the memory diagram, where the following sequence of new programs will be positioned and the resultant holes. The programs require in order 32MB, 7 MB, 10 MB, 5 MB, and 35 MB of memory. Show memory at each modification.  

A risk with ___________ is the possibility of starvation for longer processes, as long as there is a steady supply of shorter processes.

In the dynamic partitioning technique of memory management, the placement algorithm that scans memory from the beginning of memory and chooses the next available block that is large enough to satisfy the request is called

A benefit of using threads includes

Which of the following patients  requires specialty-center capabilities beyond that offered by a trauma center?

Part Two—Essay (approx. 40 minutes) Answer 1 of 2 Worth 60 points In your estimation, what are three of the most important themes in American history from Reconstruction to World War One?  To illustrate each theme, reference a primary source we have read this semester.  Successful answers will be specific, will provide examples from the readings, and will demonstrate a thorough engagement with and understanding of the chosen texts. Who were Booker T. Washington and WEB DuBois, and how did their perspectives on race relations differ?  How were they similar?  And lastly, place them into the larger context of the Black Freedom Struggle—IE, how were they different from what came before, and what came after?

Attention in the first year of life is dominated by a(n) _____ process, which involves directing attention to potentially important locations in the environment (that is, where) and recognizing objects and their features (that is, what).

A loss or impairment of language processing ability caused by brain injury is called