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Test Your Knowledge in Computers #779
Difficulty: Medium
Spectrum analysis is also referred to as time domain analysis or time density estimation.
True or False?
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false(1) [freebsd man page]

FALSE(1)						    BSD General Commands Manual 						  FALSE(1)

false -- return false value SYNOPSIS
The false utility always returns with a non-zero exit code. Some shells may provide a builtin false command which is identical to this utility. Consult the builtin(1) manual page. SEE ALSO
builtin(1), csh(1), sh(1), true(1) STANDARDS
The false utility is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible. BSD
June 6, 1993 BSD

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TIME(1) 						    BSD General Commands Manual 						   TIME(1)

time -- time command execution SYNOPSIS
time [-lp] utility DESCRIPTION
The time utility executes and times utility. After the utility finishes, time writes the total time elapsed, the time consumed by system overhead, and the time used to execute utility to the standard error stream. Times are reported in seconds. Available options: -l The contents of the rusage structure are printed. -p The output is formatted as specified by IEEE Std 1003.2-1992 (``POSIX.2''). Some shells may provide a builtin time command which is similar or identical to this utility. Consult the builtin(1) manual page. DIAGNOSTICS
The time utility shall exit with one of the following values: 1-125 An error occurred in the time utility. 126 The utility was found but could not be invoked. 127 The utility could not be found. Otherwise, the exit status of time shall be that of utility. SEE ALSO
builtin(1), csh(1), getrusage(2) FILES
/usr/include/sys/resource.h STANDARDS
The time utility conforms to IEEE Std 1003.2-1992 (``POSIX.2''). BUGS
The granularity of seconds on microprocessors is crude and can result in times being reported for CPU usage which are too large by a second. BSD
June 6, 1993 BSD

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