QUIZ-1-SS

Your digital thermometer converts temperature to a digital display. This process involves:

• a) Only sampling

• b) Only quantization

• c) Both sampling and quantization

• d) Neither sampling nor quantization

When you speak into a microphone during a function, the signal processing chain includes:

• a) Only sampling

• b) Only quantization

• c) Sampling, quantization, and encoding

• d) Direct transmission

In your favorite music streaming app, the audio is typically sampled at 44.1 kHz. Why is this specific rate chosen?

• a) It's a random number

• b) It's twice the highest frequency humans can hear

• c) It saves storage space

• d) It's easier to process

What is the main difference between discrete-time and digital signals?

• a) There is no difference

• b) Digital signals have discrete amplitudes while discrete-time signals don't

• 
  c) Digital signals are always periodic

• 
  
  d) Discrete-time signals are always DIGITAL in amplitude

When you send an emoji in WhatsApp, what type of encoding is used?

• a) Analog encoding

• 
  b) Digital encoding
  

• c) No encoding
  

• d) Natural encoding

what is the main purpose of encoding in digital communication?

• a) To make signals louder

• b) To represent information in binary form

• c) To remove noise

• d) To increase signal speed

when you switch on your fan using the regulator, the speed changes from zero to a constant value. This resembles which elementary signal?

• a) Unit impulse signal

• b) Unit step signal

• 
  c) Ramp signal

• 
  
  d) Sinusoidal signal

The alternating current (AC) that powers our homes in India operates at 50 Hz. This is an example of:

• a) Unit step signal

• b) Sinusoidal signal

• 
  c) Rectangular signal

• 
  d) Triangular signal

What is the main purpose of sampling in signal processing?

• a) To reduce signal strength

• b) To convert continuous-time signals to discrete-time signals

• c) To amplify the signal

• 
  d) To remove noise from signals

When you record your voice on WhatsApp voice notes, sampling occurs. What happens during this process?

• a) Voice is converted directly to text

• b) Continuous voice signal is converted to discrete samples

• c) Voice is only compressed

• d) Voice is amplified