Assume that the following are concurrent statements. L <= P nand Q after 10 ns; M <= L nor N after 5 ns; R <= not M; -- $3 Initially at time t=0 ns, P=1, Q=1, and N=0. If Q becomes 0 at time t=4 ns, a) At what time will the statement S1 execute? b) At what time will L be updated? -- d) At what time will R be updated? S1 S2 c) At what time will the statement S3 execute? ns ns ns ns

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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27.2

Assume that the following are concurrent statements.
L<= P nand Q after 10 ns;
M <= L nor N after 5 ns;
b) At what time will L be updated?
--
R <= not M;
Initially at time t=0 ns, P=1, Q=1, and N=0. If Q becomes 0 at time t=4 ns,
a) At what time will the statement S1 execute?
d) At what time will R be updated?
S1
--
S2
S3
c) At what time will the statement S3 execute?
ns
ns
ns
ns
Transcribed Image Text:Assume that the following are concurrent statements. L<= P nand Q after 10 ns; M <= L nor N after 5 ns; b) At what time will L be updated? -- R <= not M; Initially at time t=0 ns, P=1, Q=1, and N=0. If Q becomes 0 at time t=4 ns, a) At what time will the statement S1 execute? d) At what time will R be updated? S1 -- S2 S3 c) At what time will the statement S3 execute? ns ns ns ns
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