Technician Asays fiber optics provide illumination of several objects by a single light source. Technician B says light rays travel through the plastic strands by means of external reflections. Who is correct?

A. Technician A only
B. Technician B only
C. Both Technician A and B
D. Neither Technician A nor B


Answer: A

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An FDMA data signal duration in accompanying image is = ___________.


Fill in the blank(s) with the appropriate word(s).

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Four fair coins are flipped. Each coin tail is recorded as a 0 and a head as a 1 and the source symbol is the sum, with X1 corresponding to sum =0, X2 to sum = 1, etc. The source entropy equals HS= ________(x.xx) bits/symbol?

Fill in the blank(s) with the appropriate word(s).

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What is the heaviest and strongest piping material available?

A. duriron B. steel C. aluminum D. PVC

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Which radio frequency band does Bluetooth use?

A. 2.4 GHz ISM B. 5.0 GHz ISM C. 2.0 GHz ISM D. 4.2 GHz ISM

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