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how are spikes of electricity used in a computer to carry information?
the absence or presence of a spike represents 1 or 0.
true or false?
several logical circuits may be combined to implement a software program
false
how many different bytes can be directly addressed by a 32-bit address.
4 GB
en EKG signal is digitized at 200 samples per second and 256 levels of amplitude. approx how much memory is need to store 30 seconds worth of EKG data?
6 KB
true or false
one “meg” of RAM is approx one million bytes
true
true or false
peripheral devices include RAM
false
true or false
the CPU fetches program instructions from RAM
true
true or false
the CPU always executes CPU instructions sequentially, in the same sequence as they were written
false
the original IBM personal computer had 256 KB of RAM. about how many times more RAM does a modern comp with 2 GB of RAM have
8192
true or false
in general purpose personal computer, the operating system resides in ROM
false
true or false
when a program is running, it can read files located on the hard disk
true
true or false
when a program is running, it can change the contents of ROM
false
true or false
when a system “hangs” or crashes, the contents of ROM are lost
false
true or false
some programs can request data from the internet
true
gates, D/A converter, RAM
hardware properties
INternet browser, GUI
not hardware properties
how many different colors may be used in a digital image that uses 24 bits per pixel RGB color
over 16,000,000
what does smpt stand for
simple mail transfer protocol
