Selected MCQ

Current Question
Approximately how much data does the Vera C. Rubin Observatory collect each night?
  • A. 20 gigabytes
  • B. 200 gigabytes
  • C. 20 terabytes
  • D. 200 terabytes
Correct Answer: C
Explanation:
The Rubin Observatory’s 3.2-gigapixel camera captures about 20 TB of data per night.
Related Question 1
In what year did the Vera C. Rubin Observatory, with its 8.4-meter telescope, see first light?
  • A. 2023
  • B. 2024
  • C. 2025
  • D. 2026
Correct Answer: C
Explanation:
It saw first light in the summer of 2025 after over a decade of construction.
Related Question 2
The Vera C. Rubin Observatory's primary mission is to survey the sky for studies of:
  • A. Solar system planets
  • B. Dark matter and dark energy
  • C. Nearby satellites
  • D. Intergalactic propulsion
Correct Answer: B
Explanation:
Rubin Observatory's wide-field survey is focused on mapping dark matter and dark energy through cosmic structure.
Related Question 3
What ensures blockchain data integrity across nodes?
  • A. Public database
  • B. Hash-linked blocks and consensus
  • C. Encryption keys only
  • D. Trusted server
Correct Answer: B
Explanation:
Blockchain uses cryptographic hashes linking blocks and consensus protocols to maintain integrity.
Related Question 4
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 5
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.