Hand your Quiz Worksheet to your high school instructor at t…
Hand your Quiz Worksheet to your high school instructor at the end of the quiz. Do not upload anything here unless instructed to do so. Your college instructor will grade your work steps shown on your Quiz Worksheet and include your effort score here.
Read Detailsたなかさんの せんしゅう See what Tanaka-san did last week…
たなかさんの せんしゅう See what Tanaka-san did last week. Answer the question based on the information. Do not miss to use Te-form of verbs. Record and upload Video. Information げつようび 8:00 a.m. しゅくだいを します。 6:30 p.m. うちで ばんごはんを たべます。 かようび 8:00 p.m. ほんを よみます。 11:30 a.m. がっこうに いきます。 6:30 p.m. うちでゆっくりします。 すいようび 8:00 a.m. しゅくだいを します。 6:30 p.m. うちで ばんごはんを たべます。 もくようび 8:00 a.m. しゅくだいを します。 11:30 a.m. がっこうに いきます。 6:30 p.m. うちでゆっくりします。 きんようび 8:00 a.m. しゅくだいを します。 6:30 p.m. うちで ばんごはんを たべます。 どようび 10:00 a.m. おきます。 1:00 p.m. えいがを みます。 8:00 p.m. おふろにはいります。 にちようび 6:30 p.m. しゅくだいを します。
Read DetailsThe course is built on three pillars. Virtualization gives e…
The course is built on three pillars. Virtualization gives each program the illusion of having the machine to itself. Concurrency keeps results correct when programs really do run alongside one another. Persistence keeps data available after a program ends or the power goes out. Three things go wrong on one machine. (i) Two programs write to the same file and the lines come out mixed together. (ii) A program reads one of its own addresses and finds another program’s data there. (iii) A file written yesterday is missing after a restart. Which pillar does each belong to?
Read DetailsIn 1998 the CIH virus running on Windows 95/98 could reach t…
In 1998 the CIH virus running on Windows 95/98 could reach the boot sector of a disk — the part holding the code a machine needs in order to start — and destroy it. The lecture used this as the protection problem: what if a malicious program could bypass the OS? What made that damage possible, and what prevents it on a modern machine?
Read DetailsThe bare-metal Hello World had to know the output device’s e…
The bare-metal Hello World had to know the output device’s exact hardware addresses and handle every hardware detail itself, in twenty-five-plus lines. Under an operating system the same greeting takes one line. Grant that the library only ever has to serve this exact machine, so no question of portability arises. Why can that one line still not be the bare-metal code packaged into a library that programs call?
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