The document discusses several topics in operating systems including concurrency challenges, differences between multiprogramming, multiuser, and multiprocessing, interpretation vs compilation, logical vs physical file descriptions, and advantages of command line, graphical, and web-based interfaces. The major challenges for an OS designer supporting efficient concurrency include managing shared resources, synchronization, and ensuring independent program progress compared to running programs sequentially.

1. 1.
(2 points)
Concurrency, of course, is a requirement for modern operating
systems. What
are the major challenges that an OS designer faces in supporting
efficient concurrency that she would not face if the operating
system could just run one program at a time?
2.
(2 points)
Clearly explain the differences between multiprogramming,
multiuser, and multiprocessing.
3.
(2 points)
How does interpretation differ from compilation?
4.
(2 points)
What is the difference between the logical description of a file
and the physical
description?

2. 5.
(2 points)
List and explain some definite advantages to the use of a
command line interface over other types of interfaces. Do the
same for a graphical user interface. Do the same for a Web-
based interface. What is the target audience for each type of
interface?