Digital Communication Systems Quiz

What is the primary focus of UNIT-I in the course contents?

• Digital Communication System

• Digital Modulation Techniques

• Baseband Digital Transmissions

• Spread Spectrum Techniques

Which of the following is NOT a type of digital modulation technique mentioned?

• AM

• FSK

• QAM

• ASK

What does PCM stand for in digital communication?

• Phase Code Modulation

• Pulse Code Modulation

• Pulse Carrier Modulation

• Phase Continuous Modulation

Which system allows communication in both directions simultaneously?

• Analog System

• Full Duplex System

• Simplex System

• Half Duplex System

What is the main advantage of digital communication over analog communication?

• Lower bandwidth requirement

• Better noise immunity

• Simplicity of transmitters

• Continuous wave modulation

Which of the following is a disadvantage of digital communication?

• More complex signal processing

• Less reliable than analog

• Easier to implement

• Requires less bandwidth

What is the purpose of modulation in communication systems?

• To increase the signal strength

• To convert baseband signals to higher frequencies

• To reduce noise

• To simplify the receiver design

Which type of modulation varies the amplitude of the carrier signal?

• Frequency Shift Keying

• Phase Shift Keying

• Pulse Width Modulation

• Amplitude Modulation

Which of the following is a characteristic of baseband transmission?

• Is suitable for long-distance communication

• Transmits original information signals directly

• Uses modulation techniques

• Requires high frequency carriers

Which of the following is a type of spread spectrum technique?

• Pulse Code Modulation

• Direct Sequence Spread Spectrum

• Time Division Multiplexing

• Frequency Division Multiplexing