Types of signals: analog and digital MCQs January 8, 2026November 20, 2024 by u930973931_answers 16 min Score: 0 Attempted: 0/16 Subscribe 1. Which of the following is an example of an analog signal? (A) A digital clock’s output (B) A binary sequence (C) A sine wave (D) Morse code 2. What is a digital signal? (A) A discrete signal represented by binary values (0s and 1s) (B) A continuous signal that varies smoothly over time (C) A signal that cannot be represented in frequency domain (D) A signal with infinite resolution 3. Which of these devices works primarily with analog signals? (A) Digital thermometer (B) Smartphone screen (C) Computer processor (D) Microphone 4. What type of signal is used in modern computers for processing and storage? (A) Analog (B) Periodic (C) Continuous (D) Digital 5. Analog signals are characterized by: (A) Continuous amplitude and time (B) Discrete time intervals (C) Binary representation (D) Fixed resolution 6. What property is unique to digital signals compared to analog signals? (A) Infinite frequency range (B) Can be processed using binary arithmetic (C) Susceptibility to noise (D) Continuous representation of data 7. Which of the following is NOT a characteristic of analog signals? (A) Infinite resolution (B) More prone to noise (C) Continuous waveforms (D) Discrete time intervals 8. Digital signals are generally preferred in modern technology because they: (A) Consume more power (B) Are less susceptible to noise (C) Are continuous in nature (D) Require infinite bandwidth 9. What is the process of converting an analog signal to a digital signal called? (A) Sampling (B) Quantization (C) All of the above (D) Digitization 10. Which theorem dictates the minimum sampling rate for an analog signal to be accurately converted into a digital signal? (A) Fourier Theorem (B) Shannon’s Law (C) Nyquist Theorem (D) Z-transform Theorem 11. What is quantization in the context of analog-to-digital conversion? (A) Mapping continuous signal values to discrete levels (B) Measuring signal amplitude continuously (C) Combining multiple signals into one (D) Modulating an analog signal 12. Aliasing occurs when the sampling rate is __________ the Nyquist rate. (A) Greater than (B) Double (C) Equal to (D) Less than 13. Which of the following is an application of digital signals? (A) FM radio transmission (B) Analog television broadcasting (C) Compact disc (CD) audio storage (D) Voltage output from a thermocouple 14. Which of the following systems primarily uses analog signals? (A) USB communication (B) Landline telephones (old models) (C) Optical fiber data transmission (D) Wi-Fi communication 15. What is the major disadvantage of analog signals compared to digital signals? (A) High susceptibility to noise (B) Limited frequency range (C) Difficulty in continuous transmission (D) Inability to represent real-world phenomena 16. A significant advantage of digital signals is: (A) Infinite resolution (B) Higher bandwidth requirement (C) Easier representation of natural phenomena (D) Less noise interference