Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q1121: What is the key characteristic of QPSK that differentiates it from BPSK?
- A: It uses amplitude variation
- B: It uses frequency shifts
- C: It uses four phase shifts
- D: It is less efficient
View Answer
C
Q1122: Fill in the blank: BPSK is also known as _______.
- A: Phase Reversal Keying
- B: Amplitude Inversion Keying
- C: Frequency Hopping Keying
- D: Quadrature Keying
View Answer
A
Q1123: Which parameter remains constant in QPSK?
- A: Amplitude
- B: Frequency
- C: Phase
- D: Symbol rate
View Answer
A
Q1124: What is the symbol duration for QPSK with a bit rate of 16 Mbps?
- A: 62.5 ns
- B: 125 ns
- C: 250 ns
- D: 500 ns
View Answer
B
Q1125: What does a Karnaugh Map help to simplify in Boolean algebra?
- A: Logic gates
- B: Boolean expressions
- C: Arithmetic operations
- D: Digital circuits
View Answer
B
Q1126: Social networks enable users to communicate with each other by posting _______.
- A: information, comments, messages, images, and videos
- B: technical documents
- C: programming code
- D: commercial advertisements
View Answer
A
Q1127: A Karnaugh Map is used in _______.
- A: Number theory
- B: Simplifying Boolean expressions
- C: Data structures
- D: Compiler design
View Answer
B
Q1128: The graphical representation of a signal element using two carriers is known as _______.
- A: Amplitude Spectrum
- B: Constellation Diagram
- C: Phase Shift Diagram
- D: Carrier Mapping
View Answer
B
Q1129: The two carriers used in a constellation diagram are called _______.
- A: Analog and Digital
- B: In-phase and Quadrature
- C: Amplitude and Frequency
- D: Sine and Cosine
View Answer
B
Q1130: A constellation diagram helps define the _______ of a signal element.
- A: Frequency
- B: Amplitude and Phase
- C: Wavelength
- D: Modulation index
View Answer
B