Selected MCQ

Current Question
Which star is the closest known star to the Sun?
  • A. Proxima Centauri
  • B. Sirius
  • C. Alpha Centauri A
  • D. Barnard's Star
Correct Answer: A
Explanation:
Proxima Centauri, part of the Alpha Centauri system, is the Sun's nearest stellar neighbor at about 4.24 light-years.
Related Question 1
What is 'Proof of Stake' consensus primarily known for?
  • A. Requiring hardware to solve puzzles
  • B. Assigning validation rights based on stake held
  • C. Using artificial intelligence
  • D. Being unsecure
Correct Answer: B
Explanation:
Proof of Stake grants block validation rights to holders of cryptocurrency stake, using much less energy than PoW.
Related Question 2
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.
Related Question 3
What is the Goldilocks zone around a star?
  • A. Region where liquid water could exist
  • B. Area with intense radiation
  • C. Outer space boundary
  • D. Planet formation zone
Correct Answer: A
Explanation:
The Goldilocks (habitable) zone is where conditions may allow liquid water.
Related Question 4
In robot path planning, what is the role of the A* (A star) algorithm?
  • A. Mapping 3D environment
  • B. Optimal path search on a graph of possible moves
  • C. Real-time motion control
  • D. Image processing
Correct Answer: B
Explanation:
A* is a pathfinding algorithm that efficiently finds optimal paths on graphs or grids.
Related Question 5
Which service provides automated application security scanning against known vulnerabilities?
  • A. VPN
  • B. IDS (Intrusion Detection System)
  • C. WAF (Web Application Firewall)
  • D. Antivirus
Correct Answer: C
Explanation:
A Web Application Firewall (WAF) filters and monitors HTTP traffic for vulnerabilities like SQL injection.