Selected MCQ

Current Question
Which sensor type measures distance by using light pulses and time-of-flight calculations?
  • A. Ultrasonic sensor
  • B. Infrared sensor
  • C. LiDAR sensor
  • D. GPS sensor
Correct Answer: C
Explanation:
LiDAR uses laser light pulses and timing to determine distances to objects.
Related Question 1
Which concept involves using sensor data to create a 3D model of a city or facility?
  • A. Digital wallet
  • B. Digital twin
  • C. Virtual machine
  • D. Quantum replica
Correct Answer: B
Explanation:
Digital twins can model entire environments or systems in real-time using sensor data.
Related Question 2
What sensor does a robot use for mapping its surroundings using laser beams?
  • A. Gyroscope
  • B. Lidar
  • C. GPS
  • D. Thermometer
Correct Answer: B
Explanation:
LiDAR uses laser pulses to measure distances and help create a map of the environment.
Related Question 3
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 4
Which type of malware encrypts a user’s data and demands payment?
  • A. Ransomware
  • B. Spyware
  • C. Adware
  • D. Rootkit
Correct Answer: A
Explanation:
Ransomware locks or encrypts data and demands payment (ransom) for the key.
Related Question 5
What type of celestial object is often referred to as a "baby star" still in formation?
  • A. White dwarf
  • B. Brown dwarf
  • C. Protostar
  • D. Red giant
Correct Answer: C
Explanation:
A protostar is a very young star still forming from a collapsing gas cloud.