Selected MCQ

Current Question
Which form of encryption uses two separate keys (public and private)?
  • A. Symmetric encryption
  • B. Hashing
  • C. Asymmetric encryption
  • D. Steganography
Correct Answer: C
Explanation:
Asymmetric (public-key) encryption uses one key to encrypt and another to decrypt.
Related Question 1
Which cryptocurrency uses a blockchain but was the first to implement smart contracts?
  • A. Bitcoin
  • B. Ethereum
  • C. Litecoin
  • D. Ripple
Correct Answer: B
Explanation:
Ethereum introduced smart contracts on the blockchain.
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
Which of the following spacecraft performed a flyby of Pluto in 2015?
  • A. Voyager 2
  • B. New Horizons
  • C. Cassini
  • D. Juno
Correct Answer: B
Explanation:
New Horizons is the probe that flew by Pluto in July 2015.
Related Question 4
Which actuation method provides high force in a compact form, often used in heavy robots?
  • A. Electric motors
  • B. Hydraulic actuators
  • C. Pneumatic cylinders
  • D. Solenoids
Correct Answer: B
Explanation:
Hydraulic actuators provide high force and are common in heavy-duty robotics.
Related Question 5
Which concept refers to a model's ability to perform well on unseen data?
  • A. Underfitting
  • B. Overfitting
  • C. Generalization
  • D. Normalization
Correct Answer: C
Explanation:
Generalization is a model's ability to apply learned patterns to new data.