On Wed, Jan 22, 2020 at 10:54 AM Warner Losh wrote: > > > On Wed, Jan 22, 2020 at 7:59 AM Dan Cross wrote: > >> Btw, the answer for #16 is `cagbef`: but `g` is not an option. I would >> think the answer would be `cafbde`. Apparently in the original, option >> '(d)' is missing; one imagines that was to trick the unwary who failed to >> adequately read the question. >> > > I think this is wrong: > 16. Q: Sort the following into chronological order: a) PWB 1.2, b) V7, c) > Whirlwind, d) System V, e) 4.2BSD, f) MERT. > A: cagbef > Whirlwind is a ringer. > > So the MERT ACM paper is 1975. The BSTJ is July/Aug 1978 (received Feb > 1978). Somewhere I read (don't have a handy reference for it) that MERT > ported V4 as a supervisor process which puts it in 1974 or so. In any > event, this predates everything except Whirlwind which I can't find a paper > for. > PWB 1.2 is based on V6 + stuff. PWB 1.0 was released 1977, but we don't > have an extant 1.2 tape to verify dates with, but 1978 wouldn't be > unreasonable. > We know 7th Edition was released Jan 1979 (PWB 2.0 was released, 1980 > sometime) > System V was released January 1983 > 4.2BSD was released September 1983 (4.1c was released in 1982 though :) > > So that would make the right answer c f a b d e > > Even DMERT for the 3B20 was released in January 1983 (or the IEEE paper > for it was released then), so it can't be last. > > I also have questions about this: > > 81. Q: What was the first Unix network? > A: spider > You thought it was Datakit, didn't you? But Sandy Fraser had an earlier > project. > > When did Alexander G Fraser's spider cell network happen? For that matter, > when did Datakit happen? I can't find references to either start date on > line (nor anything on spider except for references to it in Dr Fraser's > bio). I can find references to Datakit in 1978 or so. > Oopa, spoke one google search too soon. I found this: "Sandy (A. G.) Fraser devised the Spider local-area ring (v6) and the Datakit switch (v7) that have served in the lab for overadecade. Special services on Spider included a central network file store, nfs, and a communication package, ufs. Datakit, a ‘‘central office’’ for data communication, gav e added impetus to research in distributed computing. Fraser undertook the Unix Circuit Design System (see CDL in section 4.3) to support his hardware projects" in "A Research UNIX Reader: Annotated Excerpts from the Programmer’s Manual, 1971-1986" by Doug Mcillroy. > I thought the answer was "ARPANET" since we had a NCP on 4th edition Unix > in late 1974 or early 1975 from the University of Illinois dating from that > time (the code in TUHS appears to be based on V6 + a number of patches). > > Warner > > >> - Dan C. >> >> >> On Wed, Jan 22, 2020 at 4:32 AM Rob Pike wrote: >> >>> The answers are up: >>> >>> https://commandcenter.blogspot.com/2020/01/unix-quiz-answers.html >>> >>> -rob >>> >>>