Date: Wed, 28 Mar 2001 20:32:10 From: Mark Jacobson To: 810-023-01@uni.edu Subject: Chapter 7 MODEM online quiz... Hi 023 students, Chapter 7 modems quiz consists of 45 questions. 42 of them are Multiple Choice and True/False and 3 of them are fill in the blank with the one or two word term. I decided to make it available to take from today THRU Sunday, April 8th. I believe the lab is open from 5 p.m. until 10 p.m. on Sundays. (It was stated it would be till April 6th, one week from Friday this morning in class). You have till April 8th instead. We have a hands-on class on the next two Mondays. You one 8 1/2 by 11 cheat sheet is due next Wednesday and will be graded. It should be a review of everything covered in lectures and handouts and hands-on classes, but does not need to cover the online quiz type of stuff from the book. As stated in class this morning, your cheat sheet should be useful to anyone taking the 023 class. ------ You cheat sheet only has to be understood by you, so I mean with half an hour or so of training on your cheat sheet, any student from our class should get the best possible score by using it a couple hours later to take the final exam. The reason for the above requirement is to make sure you fill your cheat sheet front and back with as much summary information as possible and whatever parts of the class seem most difficult to remember or to problem solve. There is no excuse for not maximizing your use of that 187 square inches of paper. Consume some ink and use up lots of that sheet of paper and write small. We'll probably do some sort of group exercise involving these cheat sheets on the day you turn them in or on the day I turn them back to you. Mark P.S. An 8 1/2 by 11 inch sheet of paper gives 93.5 square inches of writing surface on each side. Total area of paper: 187 inches. Biction makes a difference. See below for the bc calculator (Linux and Unix) input and output on these biction matters, as well as how to use bc to help you learn binary or hexadecimal and verify your results. ------------------------------------------------------------------------ chaos:~$ bc <---- Calculator on chaos.cns.uni.edu 8.5 * 11 bc - basic calculator 93.5 8.5 * 11 * 2 187.0 obase=2 <---- Change the output base to binary, 15 to base 2 instead of 1111 base 10. 2 * 4 + 1 1001 <---- 9 is 1001 in binary 253 + 1 11111110 <---- 253 + 1 = 254 which is 1111 1110 in binary F E obase=16 <---- obase or output base is base 16 hexadecimal 254 FE obase=10 <---- obase (output base) back to base 10 decimal - ---- ibase=2 <---- ibase or input base is now binary, base 2 11110000 - ---- 240 11111111 255 11111111 255 -15 -1111 ---- -------- 1111 240 11110000 15 255 - 240 equals 240