Selected MCQ

Current Question
In quantum communication, what is a significant advantage of quantum key distribution (QKD)?
  • A. It is faster than classical encryption
  • B. Any eavesdropping attempt can be detected
  • C. It uses standard wireless frequencies
  • D. It requires no mathematics
Correct Answer: B
Explanation:
QKD uses quantum states, so any interception of the state changes it, alerting the parties to eavesdropping. a
Related Question 1
What is a key feature of quantum computing that offers computational advantages?
  • A. Using vacuum tubes
  • B. Superposition and entanglement
  • C. Fiber optic circuits
  • D. DC power only
Correct Answer: B
Explanation:
Quantum superposition and entanglement enable certain calculations to be done much faster.
Related Question 2
Which technology helps secure communications using quantum mechanics?
  • A. Quantum key distribution (QKD)
  • B. Standard VPN
  • C. Hashing
  • D. WPA2
Correct Answer: A
Explanation:
QKD uses quantum particles to securely share encryption keys, with eavesdropping detectable.
Related Question 3
Which technology is used for secure, short-range wireless communication in IoT devices?
  • A. Wi-Fi
  • B. Bluetooth Low Energy (BLE)
  • C. Ethernet
  • D. 4G LTE
Correct Answer: B
Explanation:
Bluetooth Low Energy is a wireless protocol for low-power short-range communication.
Related Question 4
What is a major challenge in large-scale quantum computing today?
  • A. Lack of electricity
  • B. Qubit decoherence and error rates
  • C. Too much classical memory
  • D. No known algorithms
Correct Answer: B
Explanation:
Keeping qubits coherent and reducing errors are key challenges in building large quantum computers.
Related Question 5
What is a key feature of quantum computing that can offer speedups?
  • A. Using vacuum tubes
  • B. Superposition and entanglement
  • C. Fiber optic circuits
  • D. DC power only
Correct Answer: B
Explanation:
Quantum superposition and entanglement enable parallelism that can speed up tasks like factoring.