Unit 3-M3-L2 Modern Communication with Digital signals

Which is the best model of an analog signal?

• a smooth wave

• a light switch going on and of

• a series of 1’s and 0’s

• a series of pulses

Which statement defines the analog signal?

• a continuous signal representing information

• a nonlinear signal that interferes with the original signal of information

• a discrete signal representing information

• an unavoidable modification of signal representing information

........is the unavoidable modification of a signal.

• Probe

• Noise

• Digital change

• Analog change

Which best compares the reliability of analog signals and digital signals?

• Only analog signals are reliable.

• Analog signals are more reliable than digital signals.

• Digital signals are more reliable than analog signals.

• Both types of signals are equally reliable.

Which best describes binary numbers?

• a continuously changing wave

• a set of two discrete values

• a large array of values

• a set of four or five numbers

For which type(s) of signals does noise alter the original information?

• analog only

• digital only

• both analog and digital

• neither analog nor digital

How does a wireless Wi-Fi router transmit an internet connection?

• As digital signals

• as noise

• as analog signals

• as particles

Which of the below applications functions similar to a digital signal?

• an air conditioner

• a light switch

• a wooden door

• a refrigerator

What is the value of the high part of the shown digital signal?

• 1

• 10

• 0.1

• 0

What is true about speakers?

• Speakers emit sound waves that do not change with time.

• Speakers emit sound waves that change continuously with time.

• Speakers emit sound waves that change discretely with time.

• Speakers emit digital waves .