Thick coaxial cable has limited noise isolation and typically carries baseband signals.?

What does it mean in Excel if you see a series of pound signs (

)? A) Your column is not wide enough. B) You have selected an inappropriate method of formatting that cell. C) Your row is not tall enough. D) You have an error in a formula in the cell.

A computer with interrupt?driven I/O has an interrupt response time of 4 ?s (i.e., it takes 4 ?s to invoke the interrupt handler and begin executing the target code). Similarly, it takes 2 ?s to return from the interrupt and begin executing the interrupted program.

a. If this computer executes 10 instructions per microsecond and the interrupt handler is 10 instructions long, how efficient is interrupt handling? b. If interrupt handling is approximately 80% efficient, how large should the interrupt handler be (in terms of instructions)?