Coursera IOT How did we get here exam

What are the three technologies that had a huge impact on humanity in terms of information?

• Printing press

• Steam Engine

• Telephone

• Fire

• Internet

What does the right side of the video control about the audio?

• Beat

• Volume

• Tempo

• Noise

• Melody

Why did humans need language when we were hunting with tools?

• We liked to talk about our lives while hunting

• It was just the natural way to communicate

• We didn't need it

• Their hands became full and we needed a way of communicating

• We always used language

What altruistic background did Alexander Graham Bell have in speech before he invented the Telephone?

• Taught a class on giving speeches

• Taught the deaf how to communicate in alternate ways

• Was a volunteer speech giver

• Worked on audio amplifiers

• Worked on the telegraph lines

According to Nyquist, at what KHz frequency do we need to properly sample a signal with a bandwidth of 4KHz?

What is the significance of simultaeneous masking?

• We can transfer data at lower voltages

• Speech signals must be larger than normal

• More data points need to be represented

• Some data points do not need to represented

• We can transfer data at higher voltages

What does the encoder add more of that compression strips away?

• Entropy

• Redundancy

• Voltage

• Quality

• Clarity

Which of the following are based on Unix?

• iOS

• Linux

• Android

• Windows

• OSX

According to the network effect, if a network has a cost of 10, what is its value?

Which of the programming language is one of the most popular for embedded and scientific programming?

• C

• PHP

• HTML & CSS

• JavaScript